This question is related to this other oneother one I asked a few days ago. Because I have finally get to the bottom of the issue, I have rather preferred to open a new question with a more detailed information of what is going on.
replaced http://gamedev.stackexchange.com/ with https://gamedev.stackexchange.com/
This question is related to this other one I asked a few days ago. Because I have finally get to the bottom of the issue, I have rather preferred to open a new question with a more detailed information of what is going on.
This question is related to this other one I asked a few days ago. Because I have finally get to the bottom of the issue, I have rather preferred to open a new question with a more detailed information of what is going on.
i = 0;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[0],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 1;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[1],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 2;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[2],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 3;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[3],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 4;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[4],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 5;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[5],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 6;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[6],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 7;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[7],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
if (sumw<=0.0) // Evaluating this here makes that the shader behave wrong
{
discard;
}
else
{
gl_FragColor = vec4(colour, 1);
}
if(sumw<=0.0) // Evaluating this here makes that the shader perform as expected
{
discard;
}
else
{
i = 0;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[0],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 1;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[1],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 2;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[2],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 3;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[3],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 4;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[4],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 5;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[5],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 6;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[6],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 7;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[7],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
}
gl_FragColor = vec4(colour, 1);
i = 0;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[0],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 1;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[1],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 2;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[2],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 3;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[3],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 4;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[4],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 5;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[5],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 6;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[6],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 7;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[7],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
if (sumw<=0.0)
{
discard;
}
else
{
gl_FragColor = vec4(colour, 1);
}
if(sumw<=0.0)
{
discard;
}
else
{
i = 0;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[0],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 1;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[1],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 2;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[2],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 3;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[3],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 4;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[4],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 5;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[5],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 6;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[6],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 7;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[7],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
}
gl_FragColor = vec4(colour, 1);
i = 0;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[0],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 1;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[1],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 2;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[2],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 3;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[3],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 4;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[4],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 5;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[5],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 6;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[6],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 7;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[7],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
if (sumw<=0.0) // Evaluating this here makes that the shader behave wrong
{
discard;
}
else
{
gl_FragColor = vec4(colour, 1);
}
if(sumw<=0.0) // Evaluating this here makes that the shader perform as expected
{
discard;
}
else
{
i = 0;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[0],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 1;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[1],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 2;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[2],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 3;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[3],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 4;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[4],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 5;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[5],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 6;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[6],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
i = 7;
if (i<numCameras && sumw>0.0)
{
vec4 texCoord = gl_TextureMatrix[i] * p;
vec4 texColour = texture2DProj(texSampler[7],texCoord);
float w = camw[i] / sumw;
if (w>1.0) w = 1.0;
colour += texColour.rgb*w;
}
}
gl_FragColor = vec4(colour, 1);
EDIT #1: After some deeper evaluation I can conclude that the discard statement it is not the problem. The problem occurs when running the sumw if-else statement at the end of the shader, once colour has been computed. For whatever reason, if I run the sumw if-else at the end the shader, the final render is not the expected one. On the other hand, if the sumw if-else statement is in the middle of the shader, right before running the code that computes the final value of colour, the shaders works as expected.
EDIT #1: After some deeper evaluation I can conclude that the discard statement it is not the problem. The problem occurs when running the if-else statement at the end of the shader, once colour has been computed. For whatever reason, if I run the if-else at the end the shader, the final render is not the expected one. On the other hand, if the if-else statement is in the middle of the shader, right before running the code that computes the final value of colour, the shaders works as expected.
EDIT #1: After some deeper evaluation I can conclude that the discard statement it is not the problem. The problem occurs when running the sumw if-else statement at the end of the shader, once colour has been computed. For whatever reason, if I run the sumw if-else at the end the shader, the final render is not the expected one. On the other hand, if the sumw if-else statement is in the middle of the shader, right before running the code that computes the final value of colour, the shaders works as expected.
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