Entity pitch/roll/yaw?

Tagged: Entity, Matrix, pitch, reset, roll, yaw

This topic contains 5 replies, has 3 voices, and was last updated by DruggedBunny 1 year, 4 months ago.

Viewing 6 posts - 1 through 6 (of 6 total)

Author

Posts

November 30, 2017 at 11:05 pm #12045

DruggedBunny

Participant

How do you get an entity’s pitch/roll/yaw in mojo3d?

The only references I can find are buried in a Mat3<T>, in which the GetPitch, etc, methods seem to be located, but entities’ Matrix properties seem to be an AffineMat4f and er.. I…

Could we have an Entity.Pitch/Roll/Yaw? (Preferably in degrees, ahem… )

I was actually kinda hoping that this would work for resetting a camera to absolute world 0.0, 0.0, 0.0 with default rotation!

camera.Position = Null ' This works!
camera.Rotation = Null ' Entity.Rotation is not a thing. Boo!

camera.Position = Null ' This works!

camera.Rotation = Null ' Entity.Rotation is not a thing. Boo!

Even had a vague attempt at casting, but jeeeez (no go!)…

Print Mat3<Float> (camera.Matrix).GetPitch () ' Nuh-uh...

1	Print Mat3<Float> (camera.Matrix).GetPitch () ' Nuh-uh...

December 1, 2017 at 3:04 am #12048

nerobot

Participant

Look at monkey2\modules\mojo3d\scene\entityexts.monkey2.

Maybe Rx / Ry / Rz extension properties are what you searching for.

Also Vec3 struct have Yaw and Pitch properties, but suddenly haven’t Roll.

I was actually kinda hoping that this would work for resetting a camera to absolute world 0.0, 0.0, 0.0 with default rotation!

Yes, you can assing null to Vectors…

More correct way is to set vectors:

camera.Position=New Vec3f( 0 )
camera.Rotation=New Vec3f( 0 )

camera.Position=New Vec3f( 0 )

camera.Rotation=New Vec3f( 0 )

December 1, 2017 at 7:31 pm #12057

Mark Sibly

Keymaster

camera.Rotation = Null ‘ Entity.Rotation is not a thing. Boo!

This should work! I just tested entity.Rotation by adding this at the top of OnRender in (very latest) ducks demo:

		Local yrot:=_ducks[0].Rotation.y
		_ducks[0].Rotation=New Vec3f( 0,yrot+1,0 )

Local yrot:=_ducks[0].Rotation.y

_ducks[0].Rotation=New Vec3f( 0,yrot+1,0 )

_ducks[0].Rotation=Null also works here too…

[edit]

Maybe Rx / Ry / Rz extension properties are what you searching for.

Bingo. Just went to add pitch, yaw, roll, and they’re already in there as Rx, Ry, Rz, LocalRx, LocalRy, LocalRz. I may add Pitch, Yaw, Roll equivalents too…will think about it.

Also Vec3 struct have Yaw and Pitch properties, but suddenly haven’t Roll.

Vec3 has never had roll – vectors in general can’t have roll as they are infinitely thin, ie: there is no ‘sideways’ *to* roll! Matrices can though as they really represent an entire ‘space’.

December 2, 2017 at 1:16 am #12065

DruggedBunny

Participant

Ah, cool — I don’t think the IDE picks up .Rotation then! It does indeed work, though, thought I’d tried it!

Just added to the scene/model viewer below. Been using various downloaded models, but mainly the .fbx versions of these two from the new Google Poly:

https://poly.google.com/view/bmDjSxceaEE
https://poly.google.com/view/2binsxeOBve

(You have to mess about with positioning in-demo to see them properly!)

#Import "<std>"
#Import "<mojo3d>"
#Import "<mojo3d-loaders>"
#Import "<assimp>"

Using std..
Using mojo..
Using mojo3d..

' ----------------------------------------
' Application name...
' ----------------------------------------

Const FORMATS_3D:String = "fbx, obj, b3d, gltf" ' More available!

Global AppName:String = "Viewer 0.0000000000000001... pre-alpha"

Function CenterModel:Void (model:Model, scale:Float)

	' Not bulletproof! 10000 hard-coded, not sure how you get around this...
	
	model.Mesh.FitVertices (New Boxf (-10000, 0, -10000, 10000, scale, 10000), True)
	model.Position = Null
	
End

Class Game Extends Window

	Const SHIFT_BOOST:Float = 5.0
	
	Field scene:Scene
	Field camera:Camera
	Field light:Light
 
 	Field camera_boost:Float = 1.0
	
	Field modelpath:String

	Field model:Model
	Field scale:Float = 1.0

	Field copies:Stack <Model>
	
	Method New (title:String, width:Int, height:Int, flags:WindowFlags)
		
		Super.New (title, width, height, flags)
		
		scene = Scene.GetCurrent ()
		
			scene.ClearColor = New Color (0.1, 0.2, 0.75)
			scene.AmbientLight = New Color (0.5, 0.5, 0.5)
						
		camera = New Camera
 
			' Camera settings...
			
			camera.Near	= 0.1
			camera.FOV	= 90

		LoadModel ()

		light = New Light
		
			light.CastsShadow	= True
			light.Color			= New Color (0.95, 0.975, 1.0)
			light.Range			= 1000
			
			light.Move (-500, 500, -500)
			light.PointAt (model)

	End

	' This slightly dirty almost-self-contained utility method loads
	' directly into model:Model field -- ESC from load requester exits app!
	
	Method LoadModel:Void ()

		Local failed:Bool = False
		
		Repeat

			If failed Then Notify ("NOOOOooooo...", "Failed to load " + StripDir (modelpath), True)
			
			modelpath = RequestFile ("Select a model, or Cancel/ESC to exit...", FORMATS_3D, False, CurrentDir ())
		
			If Not modelpath Then App.Terminate ()
	
			ChangeDir (ExtractDir (modelpath))
			
			If model Then model.Destroy ()

			model = Model.Load (modelpath)
			
			If Not model Then failed = True
			
		Until model
		
		CenterModel (model, 5)
		
		scale = 1.0
		
		model.Scale = New Vec3f (scale, scale, scale)
		
		camera.Position = Null
		camera.Rotation = Null
		
	End
	
	Method UpdateGame:Void ()
		model.Scale = New Vec3f (scale, scale, scale)
	End
	
	Method ProcessInput:Void ()

		If Keyboard.KeyHit (Key.Space) Then light.CastsShadow = Not light.CastsShadow

		If Keyboard.KeyDown (Key.LeftShift)
			camera_boost = SHIFT_BOOST
		Else
			camera_boost = 1.0
		Endif
		
		If Keyboard.KeyHit (Key.Escape)
			LoadModel ()
		Endif
		
		If Keyboard.KeyDown (Key.A)
			camera.Move (0.0, 0.0, 0.1 * camera_boost)
		Endif
 
		If Keyboard.KeyDown (Key.Z)
			camera.Move (0.0, 0.0, -0.1 * camera_boost)
		Endif
 
		If Keyboard.KeyDown (Key.Left)
			camera.Rotate (0.0, 1.0, 0.0)
		Endif
 
		If Keyboard.KeyDown (Key.Right)
			camera.Rotate (0.0, -1.0, 0.0)
		Endif
 
		If Keyboard.KeyDown (Key.Up)
			camera.Rotate (1.0, 0.0, 0.0, True)
		Endif
 
		If Keyboard.KeyDown (Key.Down)
			camera.Rotate (-1.0, 0.0, 0.0, true)
		Endif

		If Keyboard.KeyDown (Key.Minus) Or Keyboard.KeyDown (Key.KeypadMinus)
			scale = scale - 0.1
		Endif
		
		If Keyboard.KeyDown (Key.Equals) Or Keyboard.KeyDown (Key.KeypadPlus)
			scale = scale + 0.1
		Endif
		
	End

	Method OnRender (canvas:Canvas) Override
 
	 	ProcessInput ()
 		UpdateGame ()
 
 		RequestRender ()
	
		scene.Render (canvas, camera)
 
		canvas.DrawText ("Camera controls: Cursors, plus A/Z (Shift for boost!)", 20.0, 20.0)
		canvas.DrawText ("ESC to load new model or exit (close dialog)...", 20.0, 40.0)
		canvas.DrawText ("Model scale (-/+ to change): " + scale, 20.0, 80.0)
		
	End
	
End
 
Function Main ()
	
	Local width:Int			= 1024
	Local height:Int		= 768
	Local flags:WindowFlags	= WindowFlags.Center

'	Local width:Int			= 1920
'	Local height:Int		= 1080
'	Local flags:WindowFlags	= WindowFlags.Fullscreen
	
	New AppInstance
	
	New Game (AppName, width, height, flags)
	
	App.Run ()
		
End

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

#Import "<std>"

#Import "<mojo3d>"

#Import "<mojo3d-loaders>"

#Import "<assimp>"

Using std..

Using mojo..

Using mojo3d..

' ----------------------------------------

' Application name...

' ----------------------------------------

Const FORMATS_3D:String = "fbx, obj, b3d, gltf" ' More available!

Global AppName:String = "Viewer 0.0000000000000001... pre-alpha"

Function CenterModel:Void (model:Model, scale:Float)

' Not bulletproof! 10000 hard-coded, not sure how you get around this...

model.Mesh.FitVertices (New Boxf (-10000, 0, -10000, 10000, scale, 10000), True)

model.Position = Null

End

Class Game Extends Window

Const SHIFT_BOOST:Float = 5.0

Field scene:Scene

Field camera:Camera

Field light:Light

Field camera_boost:Float = 1.0

Field modelpath:String

Field model:Model

Field scale:Float = 1.0

Field copies:Stack <Model>

Method New (title:String, width:Int, height:Int, flags:WindowFlags)

Super.New (title, width, height, flags)

scene = Scene.GetCurrent ()

scene.ClearColor = New Color (0.1, 0.2, 0.75)

scene.AmbientLight = New Color (0.5, 0.5, 0.5)

camera = New Camera

' Camera settings...

camera.Near = 0.1

camera.FOV = 90

LoadModel ()

light = New Light

light.CastsShadow = True

light.Color = New Color (0.95, 0.975, 1.0)

light.Range = 1000

light.Move (-500, 500, -500)

light.PointAt (model)

End

' This slightly dirty almost-self-contained utility method loads

' directly into model:Model field -- ESC from load requester exits app!

Method LoadModel:Void ()

Local failed:Bool = False

Repeat

If failed Then Notify ("NOOOOooooo...", "Failed to load " + StripDir (modelpath), True)

modelpath = RequestFile ("Select a model, or Cancel/ESC to exit...", FORMATS_3D, False, CurrentDir ())

If Not modelpath Then App.Terminate ()

ChangeDir (ExtractDir (modelpath))

If model Then model.Destroy ()

model = Model.Load (modelpath)

If Not model Then failed = True

Until model

CenterModel (model, 5)

scale = 1.0

model.Scale = New Vec3f (scale, scale, scale)

camera.Position = Null

camera.Rotation = Null

End

Method UpdateGame:Void ()

model.Scale = New Vec3f (scale, scale, scale)

End

Method ProcessInput:Void ()

If Keyboard.KeyHit (Key.Space) Then light.CastsShadow = Not light.CastsShadow

If Keyboard.KeyDown (Key.LeftShift)

camera_boost = SHIFT_BOOST

Else

camera_boost = 1.0

Endif

If Keyboard.KeyHit (Key.Escape)

LoadModel ()

Endif

If Keyboard.KeyDown (Key.A)

camera.Move (0.0, 0.0, 0.1 * camera_boost)

Endif

If Keyboard.KeyDown (Key.Z)

camera.Move (0.0, 0.0, -0.1 * camera_boost)

Endif

If Keyboard.KeyDown (Key.Left)

camera.Rotate (0.0, 1.0, 0.0)

Endif

If Keyboard.KeyDown (Key.Right)

camera.Rotate (0.0, -1.0, 0.0)

Endif

If Keyboard.KeyDown (Key.Up)

camera.Rotate (1.0, 0.0, 0.0, True)

Endif

If Keyboard.KeyDown (Key.Down)

camera.Rotate (-1.0, 0.0, 0.0, true)

Endif

If Keyboard.KeyDown (Key.Minus) Or Keyboard.KeyDown (Key.KeypadMinus)

scale = scale - 0.1

Endif

If Keyboard.KeyDown (Key.Equals) Or Keyboard.KeyDown (Key.KeypadPlus)

scale = scale + 0.1

Endif

End

Method OnRender (canvas:Canvas) Override

ProcessInput ()

UpdateGame ()

RequestRender ()

scene.Render (canvas, camera)

canvas.DrawText ("Camera controls: Cursors, plus A/Z (Shift for boost!)", 20.0, 20.0)

canvas.DrawText ("ESC to load new model or exit (close dialog)...", 20.0, 40.0)

canvas.DrawText ("Model scale (-/+ to change): " + scale, 20.0, 80.0)

End

Function Main ()

Local width:Int = 1024

Local height:Int = 768

Local flags:WindowFlags = WindowFlags.Center

' Local width:Int = 1920

' Local height:Int = 1080

' Local flags:WindowFlags = WindowFlags.Fullscreen

New AppInstance

New Game (AppName, width, height, flags)

App.Run ()

End

I find with these two models that scaling up to ~10.0 works nicely (see on-screen keys). You may have to ‘back up’ when scaling up!

You can hit ESC to load a new model… seems to work well. ESC/Cancel on the file requester to exit.

December 2, 2017 at 1:17 am #12066

DruggedBunny

Participant

Oh, would definitely prefer Pitch/Yaw/Roll methods… Rx/Ry/Rz don’t exactly jump out!

December 2, 2017 at 1:20 am #12067

DruggedBunny

Participant

Is there a better/more robust way to implement my <span class=”crayon-v”>CenterModel</span>, by the way?

Author

Posts

Viewing 6 posts - 1 through 6 (of 6 total)

You must be logged in to reply to this topic.

Entity pitch/roll/yaw?

Archives

Recent Replies

What is this?