#import "Common/ShaderLib/GLSLCompat.glsllib"

uniform vec4      m_Diffuse;
uniform sampler2D m_LeafMap;
uniform bool      m_HasLeafMap;

in vec2 texCoord;
in vec3 worldNormal;

void main() {
    vec3 baseColor;

    if (m_HasLeafMap) {
        vec4 tex = texture2D(m_LeafMap, texCoord);
        if (tex.a < 0.5) discard;
        baseColor = tex.rgb * m_Diffuse.rgb;
    } else {
        // Fallback: kreisförmiger Clip
        vec2 uv = texCoord * 2.0 - 1.0;
        if (dot(uv, uv) > 0.95) discard;
        float edge = 1.0 - dot(uv, uv);
        baseColor  = m_Diffuse.rgb * (0.7 + 0.3 * edge);
    }

    // Leaves transmit light — no directional shading, uniform brightness
    gl_FragColor = vec4(baseColor, 1.0);
}