PlayfulJSTerrain port

[DruggedBunnyParticipant]

This is a heightmap generator by PlayfulJS (see links in code). Screenshot below.

The author doesn’t attach a license of any kind (he treats it as public domain), which won’t suit everyone, but this port is of course provided on the same basis…

Monkey

' ----------------------------------------------------------------------------- ' Start of PlayfulJSTerrain ' ----------------------------------------------------------------------------- Class PlayfulJSTerrain ' Hunter Loftis ' http://www.playfuljs.com/realistic-terrain-in-130-lines/ ' https://github.com/hunterloftis/playfuljs-demos/blob/gh-pages/terrain/index.html Field size:Int Field max:Int Field map:Float[] Field roughness:Float Field upper:Float Field lower:Float Method New (seed:ULong, pixmap_size:Int = 1024, in_roughness:Float = 0.5) Assert (IsPow2 (pixmap_size), "PlayfulJSTerrain.New (pixmap_size) must be power of 2!") SeedRnd (seed) roughness = in_roughness size = pixmap_size + 1 max = size - 1 map = New Float[size * size] Generate () End Method GetHeight:Float (x:Int, y:Int) If (x < 0 Or x > max Or y < 0 Or y > max) Then Return -1 Return map[x + size * y] End Method SetHeight (x:Int, y:Int, val:Float) map[x + size * y] = val If val < lower Then lower = val If val > upper Then upper = val End Method Generate () lower = 0 upper = 0 SetHeight (0, 0, max) SetHeight (max, 0, max * 0.5) SetHeight (max, max, 0) SetHeight (0, max, max * 0.5) Divide (max) End Method Divide (size:Int) Local half:Int = size / 2 ' Weird failed optimisation: "If size < 2 Then Return" at start is slower than this with half < 1 check! If half < 1 Then Return Local scale:Float = roughness * size Local scale2:Float = scale * 2 ' Quick pre-calc for the two loops below... Local x:Int Local y:Int For y = half To max Step size For x = half To max Step size Square (x, y, half, Rnd () * scale2 - scale) Next Next For y = 0 To max Step half For x = (y + half) Mod size To max Step size Diamond (x, y, half, Rnd () * scale2 - scale) Next Next ' Recursive call until too small (see "If half < 1")... Divide (size / 2) End Method Square (x:Int, y:Int, in_size:Int, offset:Float) Local total:Float Local count:Int Local xms:Int = x - in_size Local yms:Int = y - in_size Local xps:Int = x + in_size Local yps:Int = y + in_size Local h0:Float = GetHeight (xms, yms) Local h1:Float = GetHeight (xps, yms) Local h2:Float = GetHeight (xps, yps) Local h3:Float = GetHeight (xms, yps) If h0 <> -1 Then total = total + h0; count = count + 1 If h1 <> -1 Then total = total + h1; count = count + 1 If h2 <> -1 Then total = total + h2; count = count + 1 If h3 <> -1 Then total = total + h3; count = count + 1 If Not count Then Return ' Don't divide by zero! SetHeight (x, y, total / count + offset) End Method Diamond (x:Int, y:Int, in_size:Int, offset:Float) Local total:Float Local count:Int Local h0:Float = GetHeight (x, y - in_size) Local h1:Float = GetHeight (x + in_size, y) Local h2:Float = GetHeight (x, y + in_size) Local h3:Float = GetHeight (x - in_size, y) If h0 <> -1 Then total = total + h0; count = count + 1 If h1 <> -1 Then total = total + h1; count = count + 1 If h2 <> -1 Then total = total + h2; count = count + 1 If h3 <> -1 Then total = total + h3; count = count + 1 If Not count Then Return ' Don't divide by zero! SetHeight (x, y, total / count + offset) End Method RenderPixmap:Pixmap () Local pix:Pixmap = New Pixmap (max, max, PixelFormat.I8) Local rgb:Float Local color:Color = New Color (0.0, 0.0, 0.0) For Local y:Int = 0 Until max For Local x:Int = 0 Until max If (upper - lower) = 0 ' Make sure range is valid for TransformRange! rgb = 0.0 Else rgb = TransformRange (GetHeight (x, y), lower, upper, 0.0, 1.0) Endif color.R = rgb color.G = rgb color.B = rgb pix.SetPixel (x, y, color) Next Next Return pix End Method TransformRange:Float (input_value:Float, from_min:Float, from_max:Float, to_min:Float, to_max:Float) ' Algorithm via jerryjvl at https://stackoverflow.com/questions/929103/convert-a-number-range-to-another-range-maintaining-ratio Local from_delta:Float = from_max - from_min ' Input range, eg. 0.0 - 1.0 Local to_delta:Float = to_max - to_min ' Output range, eg. 5.0 - 10.0 Assert (from_delta <> 0.0, "TransformRange: Invalid input range!") Return (((input_value - from_min) * to_delta) / from_delta) + to_min End Method IsPow2:Long (value:Long) Return Not (value & (value - 1)) End End ' ----------------------------------------------------------------------------- ' End of PlayfulJSTerrain ' -----------------------------------------------------------------------------

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' ----------------------------------------------------------------------------- ' Start of PlayfulJSTerrain ' ----------------------------------------------------------------------------- Class PlayfulJSTerrain ' Hunter Loftis ' http://www.playfuljs.com/realistic-terrain-in-130-lines/ ' https://github.com/hunterloftis/playfuljs-demos/blob/gh-pages/terrain/index.html Field size:Int Field max:Int Field map:Float[] Field roughness:Float Field upper:Float Field lower:Float Method New (seed:ULong, pixmap_size:Int = 1024, in_roughness:Float = 0.5) Assert (IsPow2 (pixmap_size), "PlayfulJSTerrain.New (pixmap_size) must be power of 2!") SeedRnd (seed) roughness = in_roughness size = pixmap_size + 1 max = size - 1 map = New Float[size * size] Generate () End Method GetHeight:Float (x:Int, y:Int) If (x < 0 Or x > max Or y < 0 Or y > max) Then Return -1 Return map[x + size * y] End Method SetHeight (x:Int, y:Int, val:Float) map[x + size * y] = val If val < lower Then lower = val If val > upper Then upper = val End Method Generate () lower = 0 upper = 0 SetHeight (0, 0, max) SetHeight (max, 0, max * 0.5) SetHeight (max, max, 0) SetHeight (0, max, max * 0.5) Divide (max) End Method Divide (size:Int) Local half:Int = size / 2 ' Weird failed optimisation: "If size < 2 Then Return" at start is slower than this with half < 1 check! If half < 1 Then Return Local scale:Float = roughness * size Local scale2:Float = scale * 2 ' Quick pre-calc for the two loops below... Local x:Int Local y:Int For y = half To max Step size For x = half To max Step size Square (x, y, half, Rnd () * scale2 - scale) Next Next      For y = 0 To max Step half For x = (y + half) Mod size To max Step size Diamond (x, y, half, Rnd () * scale2 - scale) Next Next ' Recursive call until too small (see "If half < 1")... Divide (size / 2) End    Method Square (x:Int, y:Int, in_size:Int, offset:Float) Local total:Float Local count:Int   Local xms:Int = x - in_size Local yms:Int = y - in_size Local xps:Int = x + in_size Local yps:Int = y + in_size Local h0:Float = GetHeight (xms, yms) Local h1:Float = GetHeight (xps, yms) Local h2:Float = GetHeight (xps, yps) Local h3:Float = GetHeight (xms, yps)   If h0 <> -1 Then total = total + h0; count = count + 1 If h1 <> -1 Then total = total + h1; count = count + 1 If h2 <> -1 Then total = total + h2; count = count + 1 If h3 <> -1 Then total = total + h3; count = count + 1 If Not count Then Return ' Don't divide by zero! SetHeight (x, y, total / count + offset)      End    Method Diamond (x:Int, y:Int, in_size:Int, offset:Float)    Local total:Float Local count:Int Local h0:Float = GetHeight (x, y - in_size) Local h1:Float = GetHeight (x + in_size, y) Local h2:Float = GetHeight (x, y + in_size) Local h3:Float = GetHeight (x - in_size, y) If h0 <> -1 Then total = total + h0; count = count + 1 If h1 <> -1 Then total = total + h1; count = count + 1 If h2 <> -1 Then total = total + h2; count = count + 1 If h3 <> -1 Then total = total + h3; count = count + 1   If Not count Then Return ' Don't divide by zero! SetHeight (x, y, total / count + offset)      End Method RenderPixmap:Pixmap () Local pix:Pixmap = New Pixmap (max, max, PixelFormat.I8) Local rgb:Float Local color:Color = New Color (0.0, 0.0, 0.0) For Local y:Int = 0 Until max For Local x:Int = 0 Until max If (upper - lower) = 0 ' Make sure range is valid for TransformRange! rgb = 0.0 Else rgb = TransformRange (GetHeight (x, y), lower, upper, 0.0, 1.0) Endif color.R = rgb color.G = rgb color.B = rgb pix.SetPixel (x, y, color) Next Next Return pix End Method TransformRange:Float (input_value:Float, from_min:Float, from_max:Float, to_min:Float, to_max:Float) ' Algorithm via jerryjvl at https://stackoverflow.com/questions/929103/convert-a-number-range-to-another-range-maintaining-ratio Local from_delta:Float = from_max - from_min ' Input range, eg. 0.0 - 1.0 Local to_delta:Float = to_max - to_min ' Output range, eg. 5.0 - 10.0 Assert (from_delta <> 0.0, "TransformRange: Invalid input range!") Return (((input_value - from_min) * to_delta) / from_delta) + to_min End Method IsPow2:Long (value:Long) Return Not (value & (value - 1)) End End   ' ----------------------------------------------------------------------------- ' End of PlayfulJSTerrain ' -----------------------------------------------------------------------------

 

You can get a simple heightmap by doing this:

Monkey

Local terrain:PlayfulJSTerrain = New PlayfulJSTerrain (seed, pixmap_size, roughness) ' eg. 1, 1024, 0.5 Local heightmap:Pixmap = terrain.RenderPixmap () heightmap.Save (DesktopDir () + "\mx2__rendered__heightmap.png")

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Local terrain:PlayfulJSTerrain = New PlayfulJSTerrain (seed, pixmap_size, roughness) ' eg. 1, 1024, 0.5 Local heightmap:Pixmap = terrain.RenderPixmap () heightmap.Save (DesktopDir () + "\mx2__rendered__heightmap.png")

 

… and here it is in runnable mojo3d demo form — paste into Ted2Go and run it! (Tested in latest GitHub develop release.)

Monkey

#Import "<std>" #Import "<mojo>" #Import "<mojo3d>" Using std.. Using mojo.. Using mojo3d.. #Rem Basic usage to generate 2D PNG heightmap (size must be power of 2): Local terrain:PlayfulJSTerrain = New PlayfulJSTerrain (seed, pixmap_size, roughness) ' eg. 1, 1024, 0.5 Local heightmap:Pixmap = terrain.RenderPixmap () heightmap.Save (DesktopDir () + "\mx2__rendered__heightmap.png") #End ' ----------------------------------------------------------------------------- ' Start of PlayfulJSTerrain ' ----------------------------------------------------------------------------- Class PlayfulJSTerrain ' Hunter Loftis ' http://www.playfuljs.com/realistic-terrain-in-130-lines/ ' https://github.com/hunterloftis/playfuljs-demos/blob/gh-pages/terrain/index.html Field size:Int Field max:Int Field map:Float[] Field roughness:Float Field upper:Float Field lower:Float Method New (seed:ULong, pixmap_size:Int = 1024, in_roughness:Float = 0.5) Assert (IsPow2 (pixmap_size), "PlayfulJSTerrain.New (pixmap_size) must be power of 2!") SeedRnd (seed) roughness = in_roughness size = pixmap_size + 1 max = size - 1 map = New Float[size * size] Generate () End Method GetHeight:Float (x:Int, y:Int) If (x < 0 Or x > max Or y < 0 Or y > max) Then Return -1 Return map[x + size * y] End Method SetHeight (x:Int, y:Int, val:Float) map[x + size * y] = val If val < lower Then lower = val If val > upper Then upper = val End Method Generate () lower = 0 upper = 0 SetHeight (0, 0, max) SetHeight (max, 0, max * 0.5) SetHeight (max, max, 0) SetHeight (0, max, max * 0.5) Divide (max) End Method Divide (size:Int) Local half:Int = size / 2 ' Weird failed optimisation: "If size < 2 Then Return" at start is slower than this with half < 1 check! If half < 1 Then Return Local scale:Float = roughness * size Local scale2:Float = scale * 2 ' Quick pre-calc for the two loops below... Local x:Int Local y:Int For y = half To max Step size For x = half To max Step size Square (x, y, half, Rnd () * scale2 - scale) Next Next For y = 0 To max Step half For x = (y + half) Mod size To max Step size Diamond (x, y, half, Rnd () * scale2 - scale) Next Next ' Recursive call until too small (see "If half < 1")... Divide (size / 2) End Method Square (x:Int, y:Int, in_size:Int, offset:Float) Local total:Float Local count:Int Local xms:Int = x - in_size Local yms:Int = y - in_size Local xps:Int = x + in_size Local yps:Int = y + in_size Local h0:Float = GetHeight (xms, yms) Local h1:Float = GetHeight (xps, yms) Local h2:Float = GetHeight (xps, yps) Local h3:Float = GetHeight (xms, yps) If h0 <> -1 Then total = total + h0; count = count + 1 If h1 <> -1 Then total = total + h1; count = count + 1 If h2 <> -1 Then total = total + h2; count = count + 1 If h3 <> -1 Then total = total + h3; count = count + 1 If Not count Then Return ' Don't divide by zero! SetHeight (x, y, total / count + offset) End Method Diamond (x:Int, y:Int, in_size:Int, offset:Float) Local total:Float Local count:Int Local h0:Float = GetHeight (x, y - in_size) Local h1:Float = GetHeight (x + in_size, y) Local h2:Float = GetHeight (x, y + in_size) Local h3:Float = GetHeight (x - in_size, y) If h0 <> -1 Then total = total + h0; count = count + 1 If h1 <> -1 Then total = total + h1; count = count + 1 If h2 <> -1 Then total = total + h2; count = count + 1 If h3 <> -1 Then total = total + h3; count = count + 1 If Not count Then Return ' Don't divide by zero! SetHeight (x, y, total / count + offset) End Method RenderPixmap:Pixmap () Local pix:Pixmap = New Pixmap (max, max, PixelFormat.I8) Local rgb:Float Local color:Color = New Color (0.0, 0.0, 0.0) For Local y:Int = 0 Until max For Local x:Int = 0 Until max If (upper - lower) = 0 ' Make sure range is valid for TransformRange! rgb = 0.0 Else rgb = TransformRange (GetHeight (x, y), lower, upper, 0.0, 1.0) Endif color.R = rgb color.G = rgb color.B = rgb pix.SetPixel (x, y, color) Next Next Return pix End Method TransformRange:Float (input_value:Float, from_min:Float, from_max:Float, to_min:Float, to_max:Float) ' Algorithm via jerryjvl at https://stackoverflow.com/questions/929103/convert-a-number-range-to-another-range-maintaining-ratio Local from_delta:Float = from_max - from_min ' Input range, eg. 0.0 - 1.0 Local to_delta:Float = to_max - to_min ' Output range, eg. 5.0 - 10.0 Assert (from_delta <> 0.0, "TransformRange: Invalid input range!") Return (((input_value - from_min) * to_delta) / from_delta) + to_min End Method IsPow2:Long (value:Long) Return Not (value & (value - 1)) End End ' ----------------------------------------------------------------------------- ' End of PlayfulJSTerrain ' ----------------------------------------------------------------------------- ' Helper function to generate checkerboard Pixmap... Function CheckerPixmap:Pixmap (color0:Color, color1:Color) Local pixels:Pixmap = New Pixmap (256, 256, PixelFormat.RGBA8) pixels.Clear (color0) Local pixel_toggle:Int = 0 For Local gp_y:Int = 0 Until pixels.Height For Local gp_x:Int = 0 Until pixels.Width If pixel_toggle Then pixels.SetPixel (gp_x, gp_y, color1) pixel_toggle = 1 - pixel_toggle Next pixel_toggle = 1 - pixel_toggle Next Return pixels End ' Demo... Class MyWindow Extends Window Field scene:Scene Field camera:Camera Field light:Light Field ground:Model Field seed:Int = 0 Field turn:Bool = True Method New( title:String="PlayfulJSTerrain to Monkey2!",width:Int=1024,height:Int=768,flags:WindowFlags=WindowFlags.Center ) ' Method New( title:String="PlayfulJSTerrain to Monkey2!",width:Int=App.DesktopSize.X,height:Int=App.DesktopSize.Y,flags:WindowFlags=WindowFlags.Fullscreen ) Super.New( title,width,height,flags ) End Method OnCreateWindow() Override scene=New Scene scene.ClearColor = Color.Sky scene.FogColor = Color.Sky scene.FogNear = 256 scene.FogFar = 1024 camera=New Camera( Self ) camera.AddComponent<FlyBehaviour>() camera.Move( 0,300,0 ) camera.Far = 1024.0 camera.Rotate (45, 0, 0) light=New Light light.CastsShadow=True light.Move (-512, 256, 0) ' GenerateTerrain returns a mojo3d Model... ground = GenerateTerrain (seed, 1024) light.PointAt(ground) Mouse.PointerVisible = False End Method OnRender( canvas:Canvas ) Override If turn Then ground.Rotate (0.0, 0.125, 0.0) If Keyboard.KeyHit (Key.Escape) Then App.Terminate () If Keyboard.KeyHit (Key.T) Then turn = Not turn ' Toggle turn variable on/off... If Keyboard.KeyHit (Key.G) seed = seed + 1 ground.Destroy () ground = GenerateTerrain (seed, 1024) Endif ' Hitting S demonstrates simple non-3D usage to generate a heightmap... If Keyboard.KeyHit (Key.S) ' Create a terrain with same details as 3D one... Local terrain:PlayfulJSTerrain = New PlayfulJSTerrain (seed) ' Defaults to size = 1024 x 1024, roughness = 0.5 ' Render to Pixmap and save to desktop... Local heightmap:Pixmap = terrain.RenderPixmap () heightmap.Save (DesktopDir () + "\mx2__rendered__heightmap.png") Endif RequestRender() scene.Update() camera.Render( canvas ) canvas.DrawText( "Seed=" + seed + ", FPS="+App.FPS,20,20 ) canvas.DrawText( "G to generate new terrain",20,40 ) canvas.DrawText( "S to save heightmap to desktop",20,60 ) canvas.DrawText( "T to toggle rotation",20,80 ) canvas.DrawText( "Cursors + A/Z to move (slowly!)",20,100 ) canvas.DrawText( "Esc to exit",20,140 ) End End ' For demo only... Function GenerateTerrain:Model (seed:ULong, size:Int = 1024, roughness:Float = 0.5, color0:Color = New Color (0.8, 0.5, 0.1), color1:Color = New Color (0.75, 0.35, 0.05)) Local terrain:PlayfulJSTerrain = New PlayfulJSTerrain (seed, size, roughness) Local heightmap:Pixmap = terrain.RenderPixmap () If Not heightmap Then RuntimeError ("Failed to generate heightmap!") heightmap.FlipY () ' 2D Y (increases downwards) translates to 3D Z (increases upwards) Local terrain_material:PbrMaterial = New PbrMaterial () terrain_material.ColorTexture = New Texture (CheckerPixmap (color0, color1), TextureFlags.None) Local terrain_height:Float = 256.0 ' TODO! Local height_box:Boxf = New Boxf (-heightmap.Width * 0.5, 0.0, -heightmap.Height * 0.5, heightmap.Width * 0.5, terrain_height, heightmap.Height * 0.5) Return Model.CreateTerrain (heightmap, height_box, New PbrMaterial (terrain_material)) End Function Main() New AppInstance New MyWindow App.Run() End

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#Import "<std>" #Import "<mojo>" #Import "<mojo3d>"   Using std.. Using mojo.. Using mojo3d..   #Rem   Basic usage to generate 2D PNG heightmap (size must be power of 2): Local terrain:PlayfulJSTerrain = New PlayfulJSTerrain (seed, pixmap_size, roughness) ' eg. 1, 1024, 0.5 Local heightmap:Pixmap = terrain.RenderPixmap ()   heightmap.Save (DesktopDir () + "\mx2__rendered__heightmap.png") #End   ' ----------------------------------------------------------------------------- ' Start of PlayfulJSTerrain ' ----------------------------------------------------------------------------- Class PlayfulJSTerrain ' Hunter Loftis ' http://www.playfuljs.com/realistic-terrain-in-130-lines/ ' https://github.com/hunterloftis/playfuljs-demos/blob/gh-pages/terrain/index.html Field size:Int Field max:Int Field map:Float[] Field roughness:Float Field upper:Float Field lower:Float Method New (seed:ULong, pixmap_size:Int = 1024, in_roughness:Float = 0.5) Assert (IsPow2 (pixmap_size), "PlayfulJSTerrain.New (pixmap_size) must be power of 2!") SeedRnd (seed) roughness = in_roughness size = pixmap_size + 1 max = size - 1 map = New Float[size * size] Generate () End Method GetHeight:Float (x:Int, y:Int) If (x < 0 Or x > max Or y < 0 Or y > max) Then Return -1 Return map[x + size * y] End Method SetHeight (x:Int, y:Int, val:Float) map[x + size * y] = val If val < lower Then lower = val If val > upper Then upper = val End Method Generate () lower = 0 upper = 0 SetHeight (0, 0, max) SetHeight (max, 0, max * 0.5) SetHeight (max, max, 0) SetHeight (0, max, max * 0.5) Divide (max) End Method Divide (size:Int) Local half:Int = size / 2 ' Weird failed optimisation: "If size < 2 Then Return" at start is slower than this with half < 1 check! If half < 1 Then Return Local scale:Float = roughness * size Local scale2:Float = scale * 2 ' Quick pre-calc for the two loops below... Local x:Int Local y:Int For y = half To max Step size For x = half To max Step size Square (x, y, half, Rnd () * scale2 - scale) Next Next      For y = 0 To max Step half For x = (y + half) Mod size To max Step size Diamond (x, y, half, Rnd () * scale2 - scale) Next Next ' Recursive call until too small (see "If half < 1")... Divide (size / 2) End    Method Square (x:Int, y:Int, in_size:Int, offset:Float) Local total:Float Local count:Int   Local xms:Int = x - in_size Local yms:Int = y - in_size Local xps:Int = x + in_size Local yps:Int = y + in_size Local h0:Float = GetHeight (xms, yms) Local h1:Float = GetHeight (xps, yms) Local h2:Float = GetHeight (xps, yps) Local h3:Float = GetHeight (xms, yps)   If h0 <> -1 Then total = total + h0; count = count + 1 If h1 <> -1 Then total = total + h1; count = count + 1 If h2 <> -1 Then total = total + h2; count = count + 1 If h3 <> -1 Then total = total + h3; count = count + 1 If Not count Then Return ' Don't divide by zero! SetHeight (x, y, total / count + offset)      End    Method Diamond (x:Int, y:Int, in_size:Int, offset:Float)    Local total:Float Local count:Int Local h0:Float = GetHeight (x, y - in_size) Local h1:Float = GetHeight (x + in_size, y) Local h2:Float = GetHeight (x, y + in_size) Local h3:Float = GetHeight (x - in_size, y) If h0 <> -1 Then total = total + h0; count = count + 1 If h1 <> -1 Then total = total + h1; count = count + 1 If h2 <> -1 Then total = total + h2; count = count + 1 If h3 <> -1 Then total = total + h3; count = count + 1   If Not count Then Return ' Don't divide by zero! SetHeight (x, y, total / count + offset)      End Method RenderPixmap:Pixmap () Local pix:Pixmap = New Pixmap (max, max, PixelFormat.I8) Local rgb:Float Local color:Color = New Color (0.0, 0.0, 0.0) For Local y:Int = 0 Until max For Local x:Int = 0 Until max If (upper - lower) = 0 ' Make sure range is valid for TransformRange! rgb = 0.0 Else rgb = TransformRange (GetHeight (x, y), lower, upper, 0.0, 1.0) Endif color.R = rgb color.G = rgb color.B = rgb pix.SetPixel (x, y, color) Next Next Return pix End Method TransformRange:Float (input_value:Float, from_min:Float, from_max:Float, to_min:Float, to_max:Float) ' Algorithm via jerryjvl at https://stackoverflow.com/questions/929103/convert-a-number-range-to-another-range-maintaining-ratio Local from_delta:Float = from_max - from_min ' Input range, eg. 0.0 - 1.0 Local to_delta:Float = to_max - to_min ' Output range, eg. 5.0 - 10.0 Assert (from_delta <> 0.0, "TransformRange: Invalid input range!") Return (((input_value - from_min) * to_delta) / from_delta) + to_min End Method IsPow2:Long (value:Long) Return Not (value & (value - 1)) End End   ' ----------------------------------------------------------------------------- ' End of PlayfulJSTerrain ' -----------------------------------------------------------------------------   ' Helper function to generate checkerboard Pixmap...   Function CheckerPixmap:Pixmap (color0:Color, color1:Color)   Local pixels:Pixmap = New Pixmap (256, 256, PixelFormat.RGBA8) pixels.Clear (color0) Local pixel_toggle:Int = 0 For Local gp_y:Int = 0 Until pixels.Height For Local gp_x:Int = 0 Until pixels.Width If pixel_toggle Then pixels.SetPixel (gp_x, gp_y, color1) pixel_toggle = 1 - pixel_toggle Next pixel_toggle = 1 - pixel_toggle Next Return pixels End   ' Demo...   Class MyWindow Extends Window Field scene:Scene Field camera:Camera Field light:Light Field ground:Model Field seed:Int = 0 Field turn:Bool = True Method New( title:String="PlayfulJSTerrain to Monkey2!",width:Int=1024,height:Int=768,flags:WindowFlags=WindowFlags.Center ) ' Method New( title:String="PlayfulJSTerrain to Monkey2!",width:Int=App.DesktopSize.X,height:Int=App.DesktopSize.Y,flags:WindowFlags=WindowFlags.Fullscreen ) Super.New( title,width,height,flags ) End Method OnCreateWindow() Override scene=New Scene scene.ClearColor = Color.Sky scene.FogColor = Color.Sky scene.FogNear = 256 scene.FogFar = 1024 camera=New Camera( Self ) camera.AddComponent<FlyBehaviour>() camera.Move( 0,300,0 ) camera.Far = 1024.0 camera.Rotate (45, 0, 0) light=New Light light.CastsShadow=True light.Move (-512, 256, 0) ' GenerateTerrain returns a mojo3d Model... ground = GenerateTerrain (seed, 1024) light.PointAt(ground)   Mouse.PointerVisible = False End Method OnRender( canvas:Canvas ) Override If turn Then ground.Rotate (0.0, 0.125, 0.0) If Keyboard.KeyHit (Key.Escape) Then App.Terminate ()   If Keyboard.KeyHit (Key.T) Then turn = Not turn ' Toggle turn variable on/off... If Keyboard.KeyHit (Key.G) seed = seed + 1 ground.Destroy () ground = GenerateTerrain (seed, 1024) Endif   ' Hitting S demonstrates simple non-3D usage to generate a heightmap... If Keyboard.KeyHit (Key.S)   ' Create a terrain with same details as 3D one... Local terrain:PlayfulJSTerrain = New PlayfulJSTerrain (seed) ' Defaults to size = 1024 x 1024, roughness = 0.5 ' Render to Pixmap and save to desktop... Local heightmap:Pixmap = terrain.RenderPixmap () heightmap.Save (DesktopDir () + "\mx2__rendered__heightmap.png")   Endif RequestRender() scene.Update() camera.Render( canvas ) canvas.DrawText( "Seed=" + seed + ", FPS="+App.FPS,20,20 ) canvas.DrawText( "G to generate new terrain",20,40 ) canvas.DrawText( "S to save heightmap to desktop",20,60 ) canvas.DrawText( "T to toggle rotation",20,80 ) canvas.DrawText( "Cursors + A/Z to move (slowly!)",20,100 ) canvas.DrawText( "Esc to exit",20,140 )   End End   ' For demo only...   Function GenerateTerrain:Model (seed:ULong, size:Int = 1024, roughness:Float = 0.5, color0:Color = New Color (0.8, 0.5, 0.1), color1:Color = New Color (0.75, 0.35, 0.05))   Local terrain:PlayfulJSTerrain = New PlayfulJSTerrain (seed, size, roughness)   Local heightmap:Pixmap = terrain.RenderPixmap ()   If Not heightmap Then RuntimeError ("Failed to generate heightmap!")   heightmap.FlipY () ' 2D Y (increases downwards) translates to 3D Z (increases upwards) Local terrain_material:PbrMaterial = New PbrMaterial ()   terrain_material.ColorTexture = New Texture (CheckerPixmap (color0, color1), TextureFlags.None) Local terrain_height:Float = 256.0 ' TODO! Local height_box:Boxf = New Boxf (-heightmap.Width * 0.5, 0.0, -heightmap.Height * 0.5, heightmap.Width * 0.5, terrain_height, heightmap.Height * 0.5) Return Model.CreateTerrain (heightmap, height_box, New PbrMaterial (terrain_material))   End   Function Main()   New AppInstance New MyWindow App.Run() End

Attachments:

1. 

   terrain.jpg
   

[DruggedBunnyParticipant]

Experimental

Multi-threaded the terrain generation (for 3D demo)!

Binary for Windows x64

(VirusTotal results)

Model.CreateTerrain is the slowest part in generating the terrain, so this does the heightmap generation/mesh creation in a background thread, meaning there’s only a small jerk while the new terrain swaps in. Not sure what causes the jerk — uploading to graphics card, maybe? Still much nicer than the previous demo.

Hit G to generate new terrain while running.

Threading is probably only in the GitHub develop branch, and is experimental. Anyway, just quickly hacked it in out of curiosity!

Note the ground?  checks for ease of use here, avoiding complex flags while the thread does its thing. I can simply turn the ground using ground?.Rotate (0.0, 0.125, 0.0) and if ground:Model is still loading/Null then it has no effect. Mark recommends against over-use of ?  checks!

(I realised GenerateTerrain also hard-codes the height for now (256), easy enough to modify, of course.)

Monkey

#Import "<std>" #Import "<mojo>" #Import "<mojo3d>" #Import "<thread>" Using std.. Using mojo.. Using mojo3d.. #Rem Basic usage to generate 2D PNG heightmap (size must be power of 2): Local terrain:PlayfulJSTerrain = New PlayfulJSTerrain (seed, pixmap_size, roughness) ' eg. 1, 1024, 0.5 Local heightmap:Pixmap = terrain.RenderPixmap () heightmap.Save (DesktopDir () + "\mx2__rendered__heightmap.png") #End ' ----------------------------------------------------------------------------- ' Start of PlayfulJSTerrain ' ----------------------------------------------------------------------------- Class PlayfulJSTerrain ' Hunter Loftis ' http://www.playfuljs.com/realistic-terrain-in-130-lines/ ' https://github.com/hunterloftis/playfuljs-demos/blob/gh-pages/terrain/index.html Field size:Int Field max:Int Field map:Float[] Field roughness:Float Field upper:Float Field lower:Float Method New (seed:ULong, pixmap_size:Int = 1024, in_roughness:Float = 0.5) Assert (IsPow2 (pixmap_size), "PlayfulJSTerrain.New (pixmap_size) must be power of 2!") SeedRnd (seed) roughness = in_roughness size = pixmap_size + 1 max = size - 1 map = New Float[size * size] Generate () End Method GetHeight:Float (x:Int, y:Int) If (x < 0 Or x > max Or y < 0 Or y > max) Then Return -1 Return map[x + size * y] End Method SetHeight (x:Int, y:Int, val:Float) map[x + size * y] = val If val < lower Then lower = val If val > upper Then upper = val End Method Generate () lower = 0 upper = 0 SetHeight (0, 0, max) SetHeight (max, 0, max * 0.5) SetHeight (max, max, 0) SetHeight (0, max, max * 0.5) Divide (max) End Method Divide (size:Int) Local half:Int = size / 2 ' Weird failed optimisation: "If size < 2 Then Return" at start is slower than this with half < 1 check! If half < 1 Then Return Local scale:Float = roughness * size Local scale2:Float = scale * 2 ' Quick pre-calc for the two loops below... Local x:Int Local y:Int For y = half To max Step size For x = half To max Step size Square (x, y, half, Rnd () * scale2 - scale) Next Next For y = 0 To max Step half For x = (y + half) Mod size To max Step size Diamond (x, y, half, Rnd () * scale2 - scale) Next Next ' Recursive call until too small (see "If half < 1")... Divide (size / 2) End Method Square (x:Int, y:Int, in_size:Int, offset:Float) Local total:Float Local count:Int Local xms:Int = x - in_size Local yms:Int = y - in_size Local xps:Int = x + in_size Local yps:Int = y + in_size Local h0:Float = GetHeight (xms, yms) Local h1:Float = GetHeight (xps, yms) Local h2:Float = GetHeight (xps, yps) Local h3:Float = GetHeight (xms, yps) If h0 <> -1 Then total = total + h0; count = count + 1 If h1 <> -1 Then total = total + h1; count = count + 1 If h2 <> -1 Then total = total + h2; count = count + 1 If h3 <> -1 Then total = total + h3; count = count + 1 If Not count Then Return ' Don't divide by zero! SetHeight (x, y, total / count + offset) End Method Diamond (x:Int, y:Int, in_size:Int, offset:Float) Local total:Float Local count:Int Local h0:Float = GetHeight (x, y - in_size) Local h1:Float = GetHeight (x + in_size, y) Local h2:Float = GetHeight (x, y + in_size) Local h3:Float = GetHeight (x - in_size, y) If h0 <> -1 Then total = total + h0; count = count + 1 If h1 <> -1 Then total = total + h1; count = count + 1 If h2 <> -1 Then total = total + h2; count = count + 1 If h3 <> -1 Then total = total + h3; count = count + 1 If Not count Then Return ' Don't divide by zero! SetHeight (x, y, total / count + offset) End Method RenderPixmap:Pixmap () Local pix:Pixmap = New Pixmap (max, max, PixelFormat.I8) Local rgb:Float Local color:Color = New Color (0.0, 0.0, 0.0) For Local y:Int = 0 Until max For Local x:Int = 0 Until max If (upper - lower) = 0 ' Make sure range is valid for TransformRange! rgb = 0.0 Else rgb = TransformRange (GetHeight (x, y), lower, upper, 0.0, 1.0) Endif color.R = rgb color.G = rgb color.B = rgb pix.SetPixel (x, y, color) Next Next Return pix End Method TransformRange:Float (input_value:Float, from_min:Float, from_max:Float, to_min:Float, to_max:Float) ' Algorithm via jerryjvl at https://stackoverflow.com/questions/929103/convert-a-number-range-to-another-range-maintaining-ratio Local from_delta:Float = from_max - from_min ' Input range, eg. 0.0 - 1.0 Local to_delta:Float = to_max - to_min ' Output range, eg. 5.0 - 10.0 Assert (from_delta <> 0.0, "TransformRange: Invalid input range!") Return (((input_value - from_min) * to_delta) / from_delta) + to_min End Method IsPow2:Long (value:Long) Return Not (value & (value - 1)) End End ' ----------------------------------------------------------------------------- ' End of PlayfulJSTerrain ' ----------------------------------------------------------------------------- ' Helper function to generate checkerboard Pixmap... Function CheckerPixmap:Pixmap (color0:Color, color1:Color) Local pixels:Pixmap = New Pixmap (256, 256, PixelFormat.RGBA8) pixels.Clear (color0) Local pixel_toggle:Bool = False For Local gp_y:Int = 0 Until pixels.Height For Local gp_x:Int = 0 Until pixels.Width If pixel_toggle Then pixels.SetPixel (gp_x, gp_y, color1) pixel_toggle = Not pixel_toggle Next pixel_toggle = Not pixel_toggle Next Return pixels End ' Demo... Class MyWindow Extends Window Field scene:Scene Field camera:Camera Field light:Light Field seed:Int = 0 Field turn:Bool = True Field ground:Model Field ground_thread:Thread Field render_timer:Int Method New( title:String="PlayfulJSTerrain to Monkey2!",width:Int=1024,height:Int=768,flags:WindowFlags=WindowFlags.Center ) ' Method New( title:String="PlayfulJSTerrain to Monkey2!",width:Int=App.DesktopSize.X,height:Int=App.DesktopSize.Y,flags:WindowFlags=WindowFlags.Fullscreen ) Super.New( title,width,height,flags ) End Method GenerateTerrain_Threaded () ' Local ticks:Int = Millisecs () Local tg:Model = GenerateTerrain (seed, 1024) ground?.Destroy () ground = tg ' Print "Terrain rendering thread took " + (Millisecs () - ticks) + " ms" ' About a second... End Method OnCreateWindow() Override scene=New Scene scene.ClearColor = Color.Sky scene.FogColor = Color.Sky scene.FogNear = 256 scene.FogFar = 1024 camera=New Camera( Self ) camera.Move( 0,300,0 ) camera.Far = 1024.0 camera.Rotate (45, 0, 0) light=New Light light.CastsShadow=True light.Move (-512, 256, 0) ' GenerateTerrain returns a mojo3d Model... 'ground = GenerateTerrain (seed, 1024) ground_thread = New Thread (GenerateTerrain_Threaded) Mouse.PointerVisible = False ' render_timer = Millisecs () End Method OnRender( canvas:Canvas ) Override ' Local render_time:Int = Millisecs () - render_timer ' render_timer = Millisecs () ' If render_time > 17 ' Print "Rendering exceeded 17 ms, taking " + render_time + " ms" ' Endif If turn Then ground?.Rotate (0.0, 0.125, 0.0) If Keyboard.KeyHit (Key.Escape) Then App.Terminate () If Keyboard.KeyHit (Key.T) Then turn = Not turn ' Toggle turn variable on/off... If Keyboard.KeyHit (Key.G) ' One at a time, please... If Not ground_thread.Running seed = seed + 1 ground_thread = New Thread (GenerateTerrain_Threaded) Endif Endif ' Hitting S demonstrates simple non-3D usage to generate a heightmap... If Keyboard.KeyHit (Key.S) ' Create a terrain with same details as 3D one... Local terrain:PlayfulJSTerrain = New PlayfulJSTerrain (seed) ' Defaults to size = 1024 x 1024, roughness = 0.5 ' Render to Pixmap and save to desktop... Local heightmap:Pixmap = terrain.RenderPixmap () heightmap.Save (DesktopDir () + "\mx2__rendered__heightmap.png") Endif If Keyboard.KeyDown (Key.A) camera.Move (0.0, 0.0, 1.0) Else If Keyboard.KeyDown (Key.Z) camera.Move (0.0, 0.0, -1.0) Endif Endif If Keyboard.KeyDown (Key.Left) camera.Rotate (0.0, 1.0, 0.0) Else If Keyboard.KeyDown (Key.Right) camera.Rotate (0.0, -1.0, 0.0) Endif Endif If Keyboard.KeyDown (Key.Up) camera.Rotate (1.0, 0.0, 0.0, True) Else If Keyboard.KeyDown (Key.Down) camera.Rotate (-1.0, 0.0, 0.0, True) Endif Endif RequestRender() scene.Update() camera.Render( canvas ) canvas.DrawText( "Seed=" + seed + ", FPS="+App.FPS,20,20 ) canvas.DrawText( "G to generate new terrain",20,40 ) canvas.DrawText( "S to save heightmap to desktop",20,60 ) canvas.DrawText( "T to toggle rotation",20,80 ) canvas.DrawText( "Cursors + A/Z to move (slowly!)",20,100 ) canvas.DrawText( "Esc to exit",20,140 ) If ground_thread.Running canvas.DrawText( "Generating new terrain...",20,180 ) Endif End End ' For demo only... Function GenerateTerrain:Model (seed:ULong, size:Int = 1024, roughness:Float = 0.5, color0:Color = New Color (0.8, 0.5, 0.1), color1:Color = New Color (0.75, 0.35, 0.05)) Local terrain:PlayfulJSTerrain = New PlayfulJSTerrain (seed, size, roughness) Local heightmap:Pixmap = terrain.RenderPixmap () If Not heightmap Then RuntimeError ("Failed to generate heightmap!") heightmap.FlipY () ' 2D Y (increases downwards) translates to 3D Z (increases upwards) Local terrain_material:PbrMaterial = New PbrMaterial () terrain_material.ColorTexture = New Texture (CheckerPixmap (color0, color1), TextureFlags.None) Local terrain_height:Float = 256.0 ' TODO! Local height_box:Boxf = New Boxf (-heightmap.Width * 0.5, 0.0, -heightmap.Height * 0.5, heightmap.Width * 0.5, terrain_height, heightmap.Height * 0.5) Return Model.CreateTerrain (heightmap, height_box, New PbrMaterial (terrain_material)) End Function Main() New AppInstance New MyWindow App.Run() End

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#Import "<std>" #Import "<mojo>" #Import "<mojo3d>" #Import "<thread>" Using std.. Using mojo.. Using mojo3d.. #Rem Basic usage to generate 2D PNG heightmap (size must be power of 2): Local terrain:PlayfulJSTerrain = New PlayfulJSTerrain (seed, pixmap_size, roughness) ' eg. 1, 1024, 0.5 Local heightmap:Pixmap = terrain.RenderPixmap () heightmap.Save (DesktopDir () + "\mx2__rendered__heightmap.png") #End ' ----------------------------------------------------------------------------- ' Start of PlayfulJSTerrain ' ----------------------------------------------------------------------------- Class PlayfulJSTerrain ' Hunter Loftis ' http://www.playfuljs.com/realistic-terrain-in-130-lines/ ' https://github.com/hunterloftis/playfuljs-demos/blob/gh-pages/terrain/index.html Field size:Int Field max:Int Field map:Float[] Field roughness:Float Field upper:Float Field lower:Float Method New (seed:ULong, pixmap_size:Int = 1024, in_roughness:Float = 0.5) Assert (IsPow2 (pixmap_size), "PlayfulJSTerrain.New (pixmap_size) must be power of 2!") SeedRnd (seed) roughness = in_roughness size = pixmap_size + 1 max = size - 1 map = New Float[size * size] Generate () End Method GetHeight:Float (x:Int, y:Int) If (x < 0 Or x > max Or y < 0 Or y > max) Then Return -1 Return map[x + size * y] End Method SetHeight (x:Int, y:Int, val:Float) map[x + size * y] = val If val < lower Then lower = val If val > upper Then upper = val End Method Generate () lower = 0 upper = 0 SetHeight (0, 0, max) SetHeight (max, 0, max * 0.5) SetHeight (max, max, 0) SetHeight (0, max, max * 0.5) Divide (max) End Method Divide (size:Int) Local half:Int = size / 2 ' Weird failed optimisation: "If size < 2 Then Return" at start is slower than this with half < 1 check! If half < 1 Then Return Local scale:Float = roughness * size Local scale2:Float = scale * 2 ' Quick pre-calc for the two loops below... Local x:Int Local y:Int For y = half To max Step size For x = half To max Step size Square (x, y, half, Rnd () * scale2 - scale) Next Next      For y = 0 To max Step half For x = (y + half) Mod size To max Step size Diamond (x, y, half, Rnd () * scale2 - scale) Next Next ' Recursive call until too small (see "If half < 1")... Divide (size / 2) End    Method Square (x:Int, y:Int, in_size:Int, offset:Float) Local total:Float Local count:Int   Local xms:Int = x - in_size Local yms:Int = y - in_size Local xps:Int = x + in_size Local yps:Int = y + in_size Local h0:Float = GetHeight (xms, yms) Local h1:Float = GetHeight (xps, yms) Local h2:Float = GetHeight (xps, yps) Local h3:Float = GetHeight (xms, yps)   If h0 <> -1 Then total = total + h0; count = count + 1 If h1 <> -1 Then total = total + h1; count = count + 1 If h2 <> -1 Then total = total + h2; count = count + 1 If h3 <> -1 Then total = total + h3; count = count + 1 If Not count Then Return ' Don't divide by zero! SetHeight (x, y, total / count + offset)      End    Method Diamond (x:Int, y:Int, in_size:Int, offset:Float)    Local total:Float Local count:Int Local h0:Float = GetHeight (x, y - in_size) Local h1:Float = GetHeight (x + in_size, y) Local h2:Float = GetHeight (x, y + in_size) Local h3:Float = GetHeight (x - in_size, y) If h0 <> -1 Then total = total + h0; count = count + 1 If h1 <> -1 Then total = total + h1; count = count + 1 If h2 <> -1 Then total = total + h2; count = count + 1 If h3 <> -1 Then total = total + h3; count = count + 1   If Not count Then Return ' Don't divide by zero! SetHeight (x, y, total / count + offset)      End Method RenderPixmap:Pixmap () Local pix:Pixmap = New Pixmap (max, max, PixelFormat.I8) Local rgb:Float Local color:Color = New Color (0.0, 0.0, 0.0) For Local y:Int = 0 Until max For Local x:Int = 0 Until max If (upper - lower) = 0 ' Make sure range is valid for TransformRange! rgb = 0.0 Else rgb = TransformRange (GetHeight (x, y), lower, upper, 0.0, 1.0) Endif color.R = rgb color.G = rgb color.B = rgb pix.SetPixel (x, y, color) Next Next Return pix End Method TransformRange:Float (input_value:Float, from_min:Float, from_max:Float, to_min:Float, to_max:Float) ' Algorithm via jerryjvl at https://stackoverflow.com/questions/929103/convert-a-number-range-to-another-range-maintaining-ratio Local from_delta:Float = from_max - from_min ' Input range, eg. 0.0 - 1.0 Local to_delta:Float = to_max - to_min ' Output range, eg. 5.0 - 10.0 Assert (from_delta <> 0.0, "TransformRange: Invalid input range!") Return (((input_value - from_min) * to_delta) / from_delta) + to_min End Method IsPow2:Long (value:Long) Return Not (value & (value - 1)) End End   ' ----------------------------------------------------------------------------- ' End of PlayfulJSTerrain ' -----------------------------------------------------------------------------   ' Helper function to generate checkerboard Pixmap... Function CheckerPixmap:Pixmap (color0:Color, color1:Color) Local pixels:Pixmap = New Pixmap (256, 256, PixelFormat.RGBA8) pixels.Clear (color0) Local pixel_toggle:Bool = False For Local gp_y:Int = 0 Until pixels.Height For Local gp_x:Int = 0 Until pixels.Width If pixel_toggle Then pixels.SetPixel (gp_x, gp_y, color1) pixel_toggle = Not pixel_toggle Next pixel_toggle = Not pixel_toggle Next Return pixels End ' Demo... Class MyWindow Extends Window Field scene:Scene Field camera:Camera Field light:Light Field seed:Int = 0 Field turn:Bool = True Field ground:Model Field ground_thread:Thread Field render_timer:Int Method New( title:String="PlayfulJSTerrain to Monkey2!",width:Int=1024,height:Int=768,flags:WindowFlags=WindowFlags.Center ) ' Method New( title:String="PlayfulJSTerrain to Monkey2!",width:Int=App.DesktopSize.X,height:Int=App.DesktopSize.Y,flags:WindowFlags=WindowFlags.Fullscreen ) Super.New( title,width,height,flags ) End Method GenerateTerrain_Threaded () ' Local ticks:Int = Millisecs () Local tg:Model = GenerateTerrain (seed, 1024) ground?.Destroy () ground = tg ' Print "Terrain rendering thread took " + (Millisecs () - ticks) + " ms" ' About a second... End Method OnCreateWindow() Override scene=New Scene scene.ClearColor = Color.Sky scene.FogColor = Color.Sky scene.FogNear = 256 scene.FogFar = 1024 camera=New Camera( Self ) camera.Move( 0,300,0 ) camera.Far = 1024.0 camera.Rotate (45, 0, 0) light=New Light light.CastsShadow=True light.Move (-512, 256, 0) ' GenerateTerrain returns a mojo3d Model... 'ground = GenerateTerrain (seed, 1024) ground_thread = New Thread (GenerateTerrain_Threaded) Mouse.PointerVisible = False ' render_timer = Millisecs () End Method OnRender( canvas:Canvas ) Override   ' Local render_time:Int = Millisecs () - render_timer   ' render_timer = Millisecs () ' If render_time > 17 ' Print "Rendering exceeded 17 ms, taking " + render_time + " ms" ' Endif   If turn Then ground?.Rotate (0.0, 0.125, 0.0) If Keyboard.KeyHit (Key.Escape) Then App.Terminate () If Keyboard.KeyHit (Key.T) Then turn = Not turn ' Toggle turn variable on/off... If Keyboard.KeyHit (Key.G) ' One at a time, please... If Not ground_thread.Running seed = seed + 1 ground_thread = New Thread (GenerateTerrain_Threaded) Endif Endif ' Hitting S demonstrates simple non-3D usage to generate a heightmap... If Keyboard.KeyHit (Key.S) ' Create a terrain with same details as 3D one... Local terrain:PlayfulJSTerrain = New PlayfulJSTerrain (seed) ' Defaults to size = 1024 x 1024, roughness = 0.5 ' Render to Pixmap and save to desktop... Local heightmap:Pixmap = terrain.RenderPixmap () heightmap.Save (DesktopDir () + "\mx2__rendered__heightmap.png") Endif If Keyboard.KeyDown (Key.A) camera.Move (0.0, 0.0, 1.0) Else If Keyboard.KeyDown (Key.Z) camera.Move (0.0, 0.0, -1.0) Endif Endif   If Keyboard.KeyDown (Key.Left) camera.Rotate (0.0, 1.0, 0.0) Else If Keyboard.KeyDown (Key.Right) camera.Rotate (0.0, -1.0, 0.0) Endif Endif   If Keyboard.KeyDown (Key.Up) camera.Rotate (1.0, 0.0, 0.0, True) Else If Keyboard.KeyDown (Key.Down) camera.Rotate (-1.0, 0.0, 0.0, True) Endif Endif RequestRender() scene.Update() camera.Render( canvas ) canvas.DrawText( "Seed=" + seed + ", FPS="+App.FPS,20,20 ) canvas.DrawText( "G to generate new terrain",20,40 ) canvas.DrawText( "S to save heightmap to desktop",20,60 ) canvas.DrawText( "T to toggle rotation",20,80 ) canvas.DrawText( "Cursors + A/Z to move (slowly!)",20,100 ) canvas.DrawText( "Esc to exit",20,140 ) If ground_thread.Running canvas.DrawText( "Generating new terrain...",20,180 ) Endif End End ' For demo only...   Function GenerateTerrain:Model (seed:ULong, size:Int = 1024, roughness:Float = 0.5, color0:Color = New Color (0.8, 0.5, 0.1), color1:Color = New Color (0.75, 0.35, 0.05)) Local terrain:PlayfulJSTerrain = New PlayfulJSTerrain (seed, size, roughness) Local heightmap:Pixmap = terrain.RenderPixmap () If Not heightmap Then RuntimeError ("Failed to generate heightmap!") heightmap.FlipY () ' 2D Y (increases downwards) translates to 3D Z (increases upwards) Local terrain_material:PbrMaterial = New PbrMaterial () terrain_material.ColorTexture = New Texture (CheckerPixmap (color0, color1), TextureFlags.None) Local terrain_height:Float = 256.0 ' TODO! Local height_box:Boxf = New Boxf (-heightmap.Width * 0.5, 0.0, -heightmap.Height * 0.5, heightmap.Width * 0.5, terrain_height, heightmap.Height * 0.5) Return Model.CreateTerrain (heightmap, height_box, New PbrMaterial (terrain_material)) End Function Main() New AppInstance New MyWindow App.Run() End

[DruggedBunnyParticipant]

Updated to fix jagged edges — threaded demo source and binary updated too. (Non-threaded ‘should’ just run from Ted2Go in recent releases, without needing GitHub develop branch.)

[AmonParticipant]

This is cool.

[Author]

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