Vec4 heatColour = vec4(texture2D(HeatValues, texCoord.

vec4 col = vec4(textureColour.rgb, 1.0) Revised Fragment Shader: const float lightWeighting = 0.5 The final version of this will need both textures being used with some lighting contributing to the final pixel values of the sphere.

My new issue is trying to get the heat texture to render to confirm that the shader can use it, however doing so causes the skin texture to render. I know that OpenGL Programming Guide, The Official Guide to Learning OpenGL, Versions 4. State Management and Drawing Geometric Objects, Chapter 3. I've had a go at doing what was suggested by user111821 and this is where I am now. OpenGL OpenGL 3 as the red book Force minimum version of formidable to 1.2.0. Gl_FragColor = (lightingColour * lightWeighting) + (r * textureWeighting) simple check to make sure that shader compiles gl_FragColor = (lightingColour * lightWeighting) + (textureColour.rgb * textureWeighting) Vec4 textureColour = vec4(texture2D(grabTexture, texCoord.xy)) // TODO: why is this blank? Vec4 lightingColour = vec4(vec4( 1.0 ) * effectiveIntesity) //TODO: improve Vec3 normNormal = normalize(vec3(Normal.xyz)) įloat d = dot(normNormal.xyz, normLightPos.xyz) įalloff = rend-distToLight / rend-rstart ĮffectiveIntesity = d*lightIntensity * falloff ĮffectiveIntesity = d*lightIntensity * (1.0/(constFudge + (linearFudge*distToLight) +(quadraticFudge*distToLight*distToLight)))

Here is the fragment shader: const float lightWeighting = 0.75

How do I do that? I was thinking with a texture but ran into some problems, likely related to the ones mentioned in another issue I've been having with the code. To do this I need to get information about the heat values of the vertices/fragments from the previous frame, I know that OpenGL doesn't provide a way to do this so I need to 'export' the values back to C++ so that C++ can forward them to the next frame. The goal is to mimic what a thermal camera might see while looking at the sphere which is under the influence of the heat lamp. First off, this is a Uni assignment, but the lecturer is stumped too.

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