ModelPS.hlsl

Texture2D colorTexture : register(t0);
SamplerState colorSampler : register(s0);

cbuffer MaterialBuffer : register(b1)
{
    float4 baseColor;
};

struct PixelInput
{
    float4 position : SV_POSITION;
    float3 normal : NORMAL;
    float2 texcoord : TEXCOORD;
};

float4 main(PixelInput input) : SV_TARGET
{
    // SIMPLE TEST: Just sample the texture
    float4 texColor = colorTexture.Sample(colorSampler, input.texcoord);
    
    // DEBUG: Show different colors based on texture result
    if (texColor.a == 0.0f)
    {
        // Texture is fully transparent
        return float4(1.0f, 0.0f, 0.0f, 1.0f); // RED = transparent
    }
    else if (texColor.r == 0.0f && texColor.g == 0.0f && texColor.b == 0.0f)
    {
        // Texture is black (or null descriptor)
        return float4(0.0f, 1.0f, 0.0f, 1.0f); // GREEN = black/null
    }
    else if (texColor.r == 1.0f && texColor.g == 1.0f && texColor.b == 1.0f)
    {
        // Texture is white
        return float4(0.0f, 0.0f, 1.0f, 1.0f); // BLUE = white
    }
    
    // Texture has actual color - apply lighting
    float3 lightDir = normalize(float3(1.0f, 1.0f, 1.0f));
    float3 normal = normalize(input.normal);
    float diff = max(dot(normal, lightDir), 0.0f);
    float ambient = 0.3f;
    
    texColor.rgb *= (ambient + diff);
    
    return texColor;
}