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#version 330
uniform vec4 lightPosition;
uniform vec3 lightIntensity;
uniform vec3 kd; // Diffuse reflectivity
uniform vec3 ka; // Ambient reflectivity
in vec3 position;
in vec3 normal;
layout (location = 0) out vec4 fragColor;
void main()
{
// Calculate the vector from the light to the fragment
vec3 s = normalize( vec3( lightPosition ) - position );
// Calculate the diffuse lighting factor
vec3 n = normalize( normal );
float diffuse = max( dot( s, n ), 0.0 );
// Multiply by incoming light intensity
fragColor = vec4( lightIntensity * (kd * diffuse + ka), 1.0 );
}
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