#version 430 core
#extension GL_ARB_bindless_texture : require

in vec2 vTexCoord;
in vec4 vColor;
out vec4 fragColor;

// Campaign V slice V2c (2026-07-27): was uvec2 uTextureHandle (a raw
// ARB_bindless_texture handle); now a slot into the binding=9 handle table.
//
// Slice V6e renamed both onto members of the shared 96-byte push-constant block
// (GpuPushConstants), which is the only home Vulkan has for a loose uniform:
// there is no default uniform block, so `uniform uint uTextureIndex;` is not
// merely unsupported, it is unspellable. Both values are per-pass — one texture,
// one layer, for a whole mesh-particle sub-batch — which is exactly what the
// block is for. uParamA carries the layer because it is consumed as a float
// anyway; the CPU writes the same integral value it always did.
uniform uint uTextureIndexA;
uniform float uParamA;

void main() {
    vec4 color = ACDREAM_SAMPLE_ARRAY(uTextureIndexA, vec3(vTexCoord, uParamA)) * vColor;
    if (color.a < 0.02)
        discard;
    fragColor = color;
}