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To calculate the mipmap value the opengl needs to calculate the difference in the texture coordinates between adjacent pixels. If there are no adjacent pixels the hw may need to spawn invisible fragments outside of the visible polygon. Our algorithm was culling these out so the mipamp calculation failed for edge pixels. Anyway this fixes quad rendering looking broken with the latest nvidia drivers.

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This commit is contained in:
Ian Curtis 2019-12-10 11:40:39 +00:00
parent 06688de5fc
commit a5858e635d
1 changed files with 6 additions and 4 deletions
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8
Src/Graphics/New3D/R3DShaderQuads.h
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@ -3,7 +3,7 @@
static const char *vertexShaderR3DQuads = R"glsl(
#version 410 core
#version 450 core
// uniforms
uniform float modelScale;
@ -53,7 +53,7 @@ void main(void)
static const char *geometryShaderR3DQuads = R"glsl(
#version 410 core
#version 450 core
layout (lines_adjacency) in;
layout (triangle_strip, max_vertices = 4) out;
@ -143,7 +143,7 @@ void main(void)
static const char *fragmentShaderR3DQuads = R"glsl(
#version 410 core
#version 450 core
uniform sampler2D tex1; // base tex
uniform sampler2D tex2; // micro tex (optional)
@ -277,8 +277,10 @@ void QuadraticInterpolation()
}
}
if (abs(lambdaSignCount) != 4) {
if(!gl_HelperInvocation) {
discard; // need to revisit this
}
}
float interp_oneOverW = 0;