Scaling a ShadowCaster?

This topic contains 8 replies, has 2 voices, and was last updated by Richard Betson 2 years, 5 months ago.

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October 21, 2016 at 9:52 am #4556

Richard Betson

Participant

Hi,

I’m trying to figure out how to scale a shadow caster. When I scale the canvas (or an image) the shadow caster that is linked to an image does not scale. I’ve added some scaling to the simplelight demo (see below) as an example of what I am trying to do.

I would have thought the shadow caster would scale with the canvas or an image but it does not seem too.

Edit – Using Monkey 2 v-1.0.7

Namespace myapp

#Import "<std>"
#Import "<mojo>"

#Import "Slate Tiles II_D.png"
#Import "Slate Tiles II_N.png"
#Import "Slate Tiles II_S.png"
#Import "pointlight_light.png"
#Import "Monkey2-logo-48.png"

Using std..
Using mojo..

Class MyWindow Extends Window

    Field _floor:Image
    
    Field _light:Image
    
    Field _logo:Image
    
    Field _shadowcaster:ShadowCaster     'Added for this test
    
    Method New()

    
        ClearColor=Color.Black
    
        _floor=Image.LoadBump( "asset::Slate Tiles II_D.png","asset::Slate Tiles II_N.png","asset::Slate Tiles II_S.png",.5,True )
        
        _light=Image.LoadLight( "asset::pointlight_light.png" )
        
        _light.Handle=New Vec2f( .5 )
    
        _light.Scale=New Vec2f( 3 )
        
        _logo=Image.Load( "asset::Monkey2-logo-48.png" )
        
        _logo.Handle=New Vec2f( .5 )
        
        _logo.ShadowCaster=New ShadowCaster( _logo.Width/2,20 )

        
    End
    
    Method OnRender( canvas:Canvas ) Override
    
        App.RequestRender()
        
        canvas.AmbientLight=Color.DarkGrey
        
        canvas.BeginLighting()

        '--- Scale ---------------
        canvas.Translate(320,240)
        canvas.Scale(.5,.5)
        canvas.Translate(-320,-240)
        '-------------------------
        
        canvas.AddLight( _light,Mouse.X,Mouse.Y )
        
        For Local x:=0 Until Width Step _floor.Width

            For Local y:=0 Until Height Step _floor.Height

                canvas.DrawImage( _floor,x,y )

            Next

        Next
        
        For Local an:=0.0 Until TwoPi Step TwoPi/8.0
        
            canvas.DrawImage( _logo,Width/2+Cos( an ) * Width/4,Height/2 + Sin( an ) * Height/4 )
        
        Next
        
        canvas.EndLighting()
        
        canvas.DrawText( App.FPS,Width/2,0,.5,0 )
    End
    
End

Function Main()

    New AppInstance
    
    New MyWindow
    
    App.Run()
End

Namespace myapp

#Import "<std>"

#Import "<mojo>"

#Import "Slate Tiles II_D.png"

#Import "Slate Tiles II_N.png"

#Import "Slate Tiles II_S.png"

#Import "pointlight_light.png"

#Import "Monkey2-logo-48.png"

Using std..

Using mojo..

Class MyWindow Extends Window

Field _floor:Image

Field _light:Image

Field _logo:Image

Field _shadowcaster:ShadowCaster 'Added for this test

Method New()

ClearColor=Color.Black

_floor=Image.LoadBump( "asset::Slate Tiles II_D.png","asset::Slate Tiles II_N.png","asset::Slate Tiles II_S.png",.5,True )

_light=Image.LoadLight( "asset::pointlight_light.png" )

_light.Handle=New Vec2f( .5 )

_light.Scale=New Vec2f( 3 )

_logo=Image.Load( "asset::Monkey2-logo-48.png" )

_logo.Handle=New Vec2f( .5 )

_logo.ShadowCaster=New ShadowCaster( _logo.Width/2,20 )

End

Method OnRender( canvas:Canvas ) Override

App.RequestRender()

canvas.AmbientLight=Color.DarkGrey

canvas.BeginLighting()

'--- Scale ---------------

canvas.Translate(320,240)

canvas.Scale(.5,.5)

canvas.Translate(-320,-240)

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

canvas.AddLight( _light,Mouse.X,Mouse.Y )

For Local x:=0 Until Width Step _floor.Width

For Local y:=0 Until Height Step _floor.Height

canvas.DrawImage( _floor,x,y )

For Local an:=0.0 Until TwoPi Step TwoPi/8.0

canvas.DrawImage( _logo,Width/2+Cos( an ) * Width/4,Height/2 + Sin( an ) * Height/4 )

canvas.EndLighting()

canvas.DrawText( App.FPS,Width/2,0,.5,0 )

End

Function Main()

New AppInstance

New MyWindow

App.Run()

End

October 21, 2016 at 9:33 pm #4561

Richard Betson

Participant

Still stuck. It seems that the shadow caster is just not effected by canvas properties like scale. Which is confusing me a bit as when I read this blog quote from Mark it appears to me that shadow casters and lights work with the canvas API.

There are few restrictions on what you can do in lighting mode: you can’t modify the viewport, scissor or ambientlight properties, or Clear() the render target – this stuff must all be setup before you enter lighting mode – but apart from that you can use the full canvas API.

So that statement leads me to believe that shadow casters should scale with the canvas, but they don’t. Shadow casters also do not rotate with the canvas (canvas.Roate()).