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Experimental support for offsetting NNCs when drawing

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Utilize polygon offset in conjunction with disabling of depth writes to
layer drawing of NNs on top of other fault drawing.
This commit is contained in:
sigurdp
2013-12-18 12:13:44 +01:00
parent 6d1db22cd8
commit 0100038db0
3 changed files with 47 additions and 12 deletions
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20
Fwk/AppFwk/CommonCode/cafEffectGenerator.cpp
View File

@@ -116,13 +116,12 @@ static cvf::ref<cvf::RenderStatePolygonOffset> CreateAngConfigurePolygonOffsetRe
}
rs->enableFillMode(true);
rs->setFactor(1.0f);
switch (polygonOffset)
{
case PO_1: rs->setUnits(1.0f); break;
case PO_2: rs->setUnits(2.0f); break;
case PO_3: rs->setUnits(3.0f); break;
case PO_1: rs->setFactor(1.0f); rs->setUnits(1.0f); break;
case PO_2: rs->setFactor(2.0f); rs->setUnits(2.0f); break;
case PO_NEG_LARGE: rs->setFactor(-1.0f); rs->setUnits(-30.0f); break;
default:
CVF_FAIL_MSG("Unhandled polygon offset enum");
}
@@ -239,6 +238,7 @@ SurfaceEffectGenerator::SurfaceEffectGenerator(const cvf::Color4f& color, Polygo
m_color = color;
m_polygonOffset = polygonOffset;
m_cullBackfaces = FC_NONE;
m_enableDepthWrite = true;
}
//--------------------------------------------------------------------------------------------------
@@ -249,6 +249,7 @@ SurfaceEffectGenerator::SurfaceEffectGenerator(const cvf::Color3f& color, Polygo
m_color = cvf::Color4f(color, 1.0f);
m_polygonOffset = polygonOffset;
m_cullBackfaces = FC_NONE;
m_enableDepthWrite = true;
}
@@ -331,6 +332,13 @@ void SurfaceEffectGenerator::updateCommonEffect(cvf::Effect* effect) const
effect->setRenderState(faceCulling.p());
}
if (!m_enableDepthWrite)
{
cvf::ref<cvf::RenderStateDepth> depth = new cvf::RenderStateDepth;
depth->enableDepthWrite(false);
effect->setRenderState(depth.p());
}
}
//--------------------------------------------------------------------------------------------------
@@ -344,6 +352,7 @@ bool SurfaceEffectGenerator::isEqual(const EffectGenerator* other) const
{
if (m_color == otherSurfaceEffect->m_color
&& m_polygonOffset == otherSurfaceEffect->m_polygonOffset
&& m_enableDepthWrite == otherSurfaceEffect->m_enableDepthWrite
&& m_cullBackfaces == otherSurfaceEffect->m_cullBackfaces)
{
return true;
@@ -360,6 +369,7 @@ EffectGenerator* SurfaceEffectGenerator::copy() const
{
SurfaceEffectGenerator* effGen = new SurfaceEffectGenerator(m_color, m_polygonOffset);
effGen->m_cullBackfaces = m_cullBackfaces;
effGen->m_enableDepthWrite = m_enableDepthWrite;
return effGen;
}

11
Fwk/AppFwk/CommonCode/cafEffectGenerator.h
View File

@@ -58,10 +58,10 @@ public:
// Enumerates different levels of polygon offsetting
enum PolygonOffset
{
PO_NONE = 0, // No polygon offset
PO_1 = 1, // 'Normal' polygon offset, equal to configurePolygonPositiveOffset(), ie factor=unit=1.0
PO_2 = 2, // More offset
PO_3 = 3 // Even more offset
PO_NONE, // No polygon offset
PO_1, // 'Normal' positive polygon offset, equal to configurePolygonPositiveOffset(), ie factor=unit=1.0
PO_2, // More positive offset
PO_NEG_LARGE // Currently, a large negative offset
};
// Enumerates face culling
@@ -125,6 +125,7 @@ public:
SurfaceEffectGenerator(const cvf::Color3f& color, PolygonOffset polygonOffset);
void setCullBackfaces(FaceCulling cullBackFaces) { m_cullBackfaces = cullBackFaces; }
void enableDepthWrite(bool enableWrite) { m_enableDepthWrite = enableWrite; }
protected:
virtual bool isEqual(const EffectGenerator* other) const;
@@ -140,7 +141,7 @@ private:
cvf::Color4f m_color;
PolygonOffset m_polygonOffset;
FaceCulling m_cullBackfaces;
bool m_enableDepthWrite;
};