50 lines
1.4 KiB
GLSL
50 lines
1.4 KiB
GLSL
#ifdef GL_ES
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precision mediump float;
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precision mediump int;
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#endif
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struct DirectionalLight {
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vec3 direction;
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vec3 halfplane;
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vec4 ambientColor;
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vec4 diffuseColor;
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vec4 specularColor;
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};
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struct Material {
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vec4 ambientFactor;
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vec4 diffuseFactor;
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vec4 specularFactor;
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float shininess;
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};
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// Light
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uniform DirectionalLight EW_directionalLight;
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// Material
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uniform Material EW_material;
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varying vec3 v_ecNormal;
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void main(void) {
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// Normalize v_ecNormal
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vec3 ecNormal = v_ecNormal / length(v_ecNormal);
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float ecNormalDotLightDirection = max(0.0, dot(ecNormal, EW_directionalLight.direction));
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float ecNormalDotLightHalfplane = max(0.0, dot(ecNormal, EW_directionalLight.halfplane));
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// Calculate ambient light
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vec4 ambientLight = EW_directionalLight.ambientColor * EW_material.ambientFactor;
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// Calculate diffuse light
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vec4 diffuseLight = ecNormalDotLightDirection * EW_directionalLight.diffuseColor * EW_material.diffuseFactor;
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// Calculate specular light
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vec4 specularLight = EW_directionalLight.specularColor * EW_material.specularFactor;
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if (ecNormalDotLightHalfplane > 0.0) {
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specularLight = pow(ecNormalDotLightHalfplane, EW_material.shininess) * EW_directionalLight.specularColor * EW_material.specularFactor;
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specularLight = EW_directionalLight.specularColor * EW_material.specularFactor;
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}
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vec4 light = ambientLight + diffuseLight + specularLight;
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gl_FragColor = light;
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}
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