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Created texture and texture coord calculations

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This commit is contained in:
Magne Sjaastad
2014-08-10 09:50:50 +02:00
parent e9b67a9599
commit 0440e21f27
3 changed files with 103 additions and 14 deletions
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34
ApplicationCode/ModelVisualization/RivTernaryScalarMapper.cpp
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@@ -29,6 +29,7 @@ RivTernaryScalarMapper::RivTernaryScalarMapper(const cvf::Color3f& undefScalarCo
m_opacityLevel(opacityLevel),
m_textureSize(128, 256)
{
setTernaryRanges(0.0, 1.0, 0.0, 1.0);
}
//--------------------------------------------------------------------------------------------------
@@ -36,8 +37,19 @@ RivTernaryScalarMapper::RivTernaryScalarMapper(const cvf::Color3f& undefScalarCo
//--------------------------------------------------------------------------------------------------
cvf::Vec2f RivTernaryScalarMapper::mapToTextureCoord(double soil, double swat, bool isTransparent)
{
cvf::Vec2f texCoord;
double soilNormalized = (soil - m_rangeMinSoil) * m_soilFactor;
soilNormalized = cvf::Math::clamp(soilNormalized, 0.0, 1.0);
double swatNormalized = (swat - m_rangeMinSwat) * m_swatFactor;
swatNormalized = cvf::Math::clamp(swatNormalized, 0.0, 1.0 - soilNormalized);
swatNormalized /= 2.0;
if (isTransparent)
{
swatNormalized += 0.5;
}
cvf::Vec2f texCoord(static_cast<float>(soilNormalized), static_cast<float>(swatNormalized));
return texCoord;
}
@@ -73,10 +85,10 @@ bool RivTernaryScalarMapper::updateTexture(cvf::TextureImage* image)
float yStride = static_cast<float>(1.0f / halfTextureHeight);
float sgas_red = 0.0f;
for (int yPos = 0; yPos < halfTextureHeight; yPos++)
for (cvf::uint yPos = 0; yPos < halfTextureHeight; yPos++)
{
float soil_green = 0.0f;
for (int xPos = 0; xPos < m_textureSize.x() - yPos; xPos++)
for (cvf::uint xPos = 0; xPos < m_textureSize.x() - yPos; xPos++)
{
float swat_blue = 1.0f - sgas_red - soil_green;
@@ -90,7 +102,7 @@ bool RivTernaryScalarMapper::updateTexture(cvf::TextureImage* image)
image->setPixel(xPos, yPos, clr);
// Set opacity
const cvf::Color4ub clrOpacity(rByteCol, gByteCol, bByteCol, 255 * m_opacityLevel);
const cvf::Color4ub clrOpacity(rByteCol, gByteCol, bByteCol, static_cast<cvf::ubyte>(255 * m_opacityLevel));
image->setPixel(xPos, yPos + halfTextureHeight, clrOpacity);
soil_green += xStride;
@@ -100,3 +112,17 @@ bool RivTernaryScalarMapper::updateTexture(cvf::TextureImage* image)
return true;
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RivTernaryScalarMapper::setTernaryRanges(double soilLower, double soilUpper, double swatLower, double swatUpper)
{
m_rangeMinSoil = soilLower;
m_rangeMaxSoil = soilUpper;
m_soilFactor = 1.0 / (soilUpper - soilLower);
m_rangeMinSwat = swatLower;
m_rangeMaxSwat = swatUpper;
m_swatFactor = 1.0 / (swatUpper - swatLower);
}