spg-project/resources/fragment.fs

#version 430

layout (binding = 0) uniform sampler3D samp;

in vec3 varTexture;

out vec4 color;

void main(void) {
    //float f = texture(samp, varTexture).r;
    float x = varTexture.x - int(varTexture.x);
    float y = varTexture.y - int(varTexture.y);
    float z = varTexture.z - int(varTexture.z);
    color = vec4(x, y, z, 1.0);
    //color = vec4(varTexture, 0.0, 1.0);
}