initial commit-moved from vulkan_guide

shaders/gbuffer.frag

@@ -0,0 +1,26 @@
+#version 450
+#extension GL_GOOGLE_include_directive : require
+#include "input_structures.glsl"
+
+layout(location = 0) in vec3 inNormal;
+layout(location = 1) in vec3 inColor;
+layout(location = 2) in vec2 inUV;
+layout(location = 3) in vec3 inWorldPos;
+
+layout(location = 0) out vec4 outPos;
+layout(location = 1) out vec4 outNorm;
+layout(location = 2) out vec4 outAlbedo;
+
+void main() {
+    // Apply baseColor texture and baseColorFactor once
+    vec3 albedo = inColor * texture(colorTex, inUV).rgb * materialData.colorFactors.rgb;
+
+    // glTF metallic-roughness in G (roughness) and B (metallic)
+    vec2 mrTex = texture(metalRoughTex, inUV).gb;
+    float roughness = clamp(mrTex.x * materialData.metal_rough_factors.y, 0.04, 1.0);
+    float metallic  = clamp(mrTex.y * materialData.metal_rough_factors.x, 0.0, 1.0);
+
+    outPos = vec4(inWorldPos, 1.0);
+    outNorm = vec4(normalize(inNormal), roughness);
+    outAlbedo = vec4(albedo, metallic);
+}