@luma.gl/shadertools
Version:
Shader module system for luma.gl
2 lines • 3.15 kB
JavaScript
export default "\nuniform float lighting_uAmbient;\nuniform float lighting_uDiffuse;\nuniform float lighting_uShininess;\nuniform vec3 lighting_uSpecularColor;\n\nvec3 lighting_getLightColor(vec3 surfaceColor, vec3 light_direction, vec3 view_direction, vec3 normal_worldspace, vec3 color) {\n vec3 halfway_direction = normalize(light_direction + view_direction);\n float lambertian = dot(light_direction, normal_worldspace);\n float specular = 0.0;\n if (lambertian > 0.0) {\n float specular_angle = max(dot(normal_worldspace, halfway_direction), 0.0);\n specular = pow(specular_angle, lighting_uShininess);\n }\n lambertian = max(lambertian, 0.0);\n return (lambertian * lighting_uDiffuse * surfaceColor + specular * lighting_uSpecularColor) * color;\n}\n\nvec3 lighting_getLightColor(vec3 surfaceColor, vec3 cameraPosition, vec3 position_worldspace, vec3 normal_worldspace) {\n vec3 lightColor = surfaceColor;\n\n if (lighting_uEnabled) {\n vec3 view_direction = normalize(cameraPosition - position_worldspace);\n lightColor = lighting_uAmbient * surfaceColor * lighting_uAmbientLight.color;\n\n for (int i = 0; i < MAX_LIGHTS; i++) {\n if (i >= lighting_uPointLightCount) {\n break;\n }\n PointLight pointLight = lighting_uPointLight[i];\n vec3 light_position_worldspace = pointLight.position;\n vec3 light_direction = normalize(light_position_worldspace - position_worldspace);\n lightColor += lighting_getLightColor(surfaceColor, light_direction, view_direction, normal_worldspace, pointLight.color);\n }\n\n for (int i = 0; i < MAX_LIGHTS; i++) {\n if (i >= lighting_uDirectionalLightCount) {\n break;\n }\n DirectionalLight directionalLight = lighting_uDirectionalLight[i];\n lightColor += lighting_getLightColor(surfaceColor, -directionalLight.direction, view_direction, normal_worldspace, directionalLight.color);\n }\n }\n return lightColor;\n}\n\nvec3 lighting_getSpecularLightColor(vec3 cameraPosition, vec3 position_worldspace, vec3 normal_worldspace) {\n vec3 lightColor = vec3(0, 0, 0);\n vec3 surfaceColor = vec3(0, 0, 0);\n\n if (lighting_uEnabled) {\n vec3 view_direction = normalize(cameraPosition - position_worldspace);\n\n for (int i = 0; i < MAX_LIGHTS; i++) {\n if (i >= lighting_uPointLightCount) {\n break;\n }\n PointLight pointLight = lighting_uPointLight[i];\n vec3 light_position_worldspace = pointLight.position;\n vec3 light_direction = normalize(light_position_worldspace - position_worldspace);\n lightColor += lighting_getLightColor(surfaceColor, light_direction, view_direction, normal_worldspace, pointLight.color);\n }\n\n for (int i = 0; i < MAX_LIGHTS; i++) {\n if (i >= lighting_uDirectionalLightCount) {\n break;\n }\n DirectionalLight directionalLight = lighting_uDirectionalLight[i];\n lightColor += lighting_getLightColor(surfaceColor, -directionalLight.direction, view_direction, normal_worldspace, directionalLight.color);\n }\n }\n return lightColor;\n}\n";
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