Continuing my forays into deferred rendering, I’m having problems getting stenciling to work with the offscreen buffers. Stenciling works as expected with the base buffer, but seems to fail with the offscreen buffer. buffer.getFbPropertities() does report that a stencil buffer is attached to the offscreen buffer.
Does anyone have any experience with this?
import direct.directbase.DirectStart
from pandac.PandaModules import *
import math
import time
def CreateFBO(strName = "Buffer", intSort = -10, intSizeX = None, intSizeY = None,
intAuxRGBA = 0):
winprops = WindowProperties()
winprops.setSize( intSizeX , intSizeY )
fbprops = FrameBufferProperties()
fbprops.setColorBits(1)
fbprops.setAlphaBits(1)
fbprops.setDepthBits(1)
fbprops.setStencilBits (1)
if intAuxRGBA:
fbprops.setAuxRgba( intAuxRGBA )
objBuffer = base.graphicsEngine.makeOutput(base.pipe, strName, intSort, fbprops, winprops, GraphicsPipe.BFRefuseWindow, base.win.getGsg(), base.win)
return objBuffer
texDepth = Texture()
texDepth.setFormat(Texture.FDepthStencil)
texBuffer0 = Texture()
texBuffer1 = Texture()
texBuffer2 = Texture()
texBuffer3 = Texture()
rtmbuffer = CreateFBO(strName = "model buffer", intSort = -5, intSizeX = 1024, intSizeY = 1024, intAuxRGBA = 3)
rtmbuffer.addRenderTexture( texDepth, GraphicsOutput.RTMCopyTexture, GraphicsOutput.RTPDepthStencil )
rtmbuffer.addRenderTexture( texBuffer0, GraphicsOutput.RTMCopyTexture, GraphicsOutput.RTPColor )
rtmbuffer.addRenderTexture( texBuffer1, GraphicsOutput.RTMCopyTexture, GraphicsOutput.RTPAuxRgba0 )
rtmbuffer.addRenderTexture( texBuffer2, GraphicsOutput.RTMCopyTexture, GraphicsOutput.RTPAuxRgba1 )
rtmbuffer.addRenderTexture( texBuffer3, GraphicsOutput.RTMCopyTexture, GraphicsOutput.RTPAuxRgba2 )
rtmcamMask = 1
rtmcam=base.makeCamera( rtmbuffer, sort = 0, lens=base.camLens, scene=render, mask = rtmcamMask, camName = 'TestCam' )
rtmcam.setPos( 0, -20, 0)
rtmcam.node().getDisplayRegion(0).setClearColorActive(True)
rtmbuffer.setClearColorActive(True)
rtmbuffer.setClearDepthActive(True)
shader = loader.loadShader( "testdef.c")
npModel = loader.loadModel( 'smiley.egg' )
npModel.reparentTo( render )
npModel.setShader( shader )
npModel.setAttrib( StencilAttrib.make(1,StencilAttrib.SCFAlways,StencilAttrib.SOZero, StencilAttrib.SOReplace,StencilAttrib.SOReplace, 1, 0, 1) )
npModel2 = loader.loadModel( 'smiley.egg' )
npModel2.reparentTo( render )
npModel2.setBin("fixed", 40)
npModel2.setPos( 0, -5, 0 )
npModel2.setAttrib( StencilAttrib.make(1,StencilAttrib.SCFEqual,StencilAttrib.SOKeep, StencilAttrib.SOKeep,StencilAttrib.SOKeep,1,1,0) )
shader2 = loader.loadShader( "testdef2.c")
npModel2.setShader( shader2 )
base.cam.setPos(0,-20, 0)
base.bufferViewer.toggleEnable()
def move(task):
base.cam.setPos( 3*math.sin(time.time()), -20, 0 )
rtmcam.setPos( 3*math.sin(time.time()), -20, 0 )
return task.cont
taskMgr.add( move, 'move' )
run()shader 1 - testdef.c
//Cg
//
//Cg profile arbvp1 arbfp1
void vshader(float4 vtx_position : POSITION,
uniform float4x4 mat_modelproj,
in float2 vtx_texcoord0 : TEXCOORD0,
out float2 l_texcoord0 : TEXCOORD0,
out float4 l_position : POSITION)
{
l_position=mul(mat_modelproj, vtx_position);
l_texcoord0 = vtx_texcoord0;
}
void fshader( in float2 l_texcoord0 : TEXCOORD0,
uniform sampler2D tex_0 : TEXUNIT0,
out float4 o_color0: COLOR0,
out float4 o_color1: COLOR1,
out float4 o_color2: COLOR2,
out float4 o_color3: COLOR3 )
{
o_color0 = float4( 1, 0, 0, 1);
o_color1 = float4( 0, 1, 0, 1);
o_color2 = float4( 0, 0, 1, 1);
o_color3 = float4( 1, 1, 0, 1);
}
shader 2 - testdef2.c
void vshader(float4 vtx_position : POSITION,
uniform float4x4 mat_modelproj,
in float2 vtx_texcoord0 : TEXCOORD0,
out float2 l_texcoord0 : TEXCOORD0,
out float4 l_position : POSITION)
{
l_position=mul(mat_modelproj, vtx_position);
l_texcoord0 = vtx_texcoord0;
}
void fshader( in float2 l_texcoord0 : TEXCOORD0,
uniform sampler2D tex_0 : TEXUNIT0,
out float4 o_color0: COLOR0,
out float4 o_color1: COLOR1,
out float4 o_color2: COLOR2,
out float4 o_color3: COLOR3 )
{
o_color0 = float4( 1, 1, 1, 1);
o_color1 = float4( 0, 1, 0, 1);
o_color2 = float4( 0, 0, 1, 1);
o_color3 = float4( 1, 1, 0, 1);
}