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What happens when I read a texture from a sampler?
If you attempt to read from a sampler where the texture’s Image Format doesn’t match the sampler’s basic format (usampler2D with a GL_R8I, or sampler1D with GL_R8UI, for example), all reads will produce undefined values. Depth-component textures are treated as one-component floating-point textures.
How to bind the texture in layout binding?
I’m a bit confused on what would be the right way to bind the texture when uniforms are using the layout binding. layout (binding = 0, std140) uniform uCommon { mat4 projectionMatrix; mat4 viewMatrix; }; layout (binding = 1, std140) uniform uModel { mat4 modelViewProjectionMatrix; }; layout (binding = 3) uniform sampler2D uTexture;
Can a primitive be computed in a fragment shader?
However, this is only possible within a Fragment Shader. In any other shader stage, there is no rendered primitive yet; there may be a vertex or a primitive, but the space of the primitive relative to the window is unknown. So derivatives cannot be implicitly computed.
How are Shadow samplers different from array samplers?
The size of the vec type of texCoord depends on the dimensionality of sampler. A 1D sampler takes a “float”, 2D samplers take “vec2”, etc. Array samplers add one additional coordinate for the array level to sample. Shadow samplers add one additional coordinate for the sampler comparison value.
What’s the difference between normalized and Texel space textures?
A normalized texture coordinate means that the size of the texture maps to the coordinates on the range [0, 1] in each dimension. This allows the texture coordinate to be independent of any particular texture’s size. A texel-space texture coordinate means that the coordinates are on the range [0, size],…
What is the name of the unsigned integer sampler?
Signed integer vectors are ” ivec “, and unsigned integer vectors are ” uvec “. So for samplers, floating-point samplers begin with ” sampler “. Signed integer samplers begin with ” isampler “, and unsigned integer samplers begin with ” usampler “.