feat: render and manage textures :3

shaders/frag.glsl.frag

@@ -1,16 +1,34 @@
+
 #version 450
 
 // Input from vertex shader
-layout(location = 0) in vec3 fragColor;
-// layout(location = 1) in vec2 fragTexCoord; // If using textures
+layout(location = 0) in vec3 fragNormal; // Receive normal
+layout(location = 1) in vec2 fragTexCoord; // Receive texture coordinates
 
 // Output color
 layout(location = 0) out vec4 outColor;
 
-// layout(binding = 1) uniform sampler2D texSampler; // If using textures
+// Descriptor set for material properties (Set 1)
+layout(set = 1, binding = 0) uniform sampler2D baseColorSampler;
+
+// Optional: Pass material factors via another UBO or Push Constants if needed
+// layout(set = 1, binding = 1) uniform MaterialFactors {
+//     vec4 baseColorFactor;
+// } materialFactors;
 
 void main() {
-    // Use interpolated color
-    outColor = vec4(fragColor, 1.0);
-    // outColor = texture(texSampler, fragTexCoord); // If using textures
+    // Sample the texture
+    vec4 texColor = texture(baseColorSampler, fragTexCoord);
+
+    // Use the texture color
+    // You might multiply by baseColorFactor here if you pass it
+    // outColor = texColor * materialFactors.baseColorFactor;
+    outColor = texColor;
+
+    // Basic fallback if texture alpha is zero (or use baseColorFactor)
+    if (outColor.a == 0.0) {
+        outColor = vec4(0.8, 0.8, 0.8, 1.0); // Default grey
+    }
+
+    // You could add basic lighting using fragNormal here later
 }