1mjb – May 4, 2007Flat Interpolation in the RasterizerMike BaileyOregon State Universitymjb – May 4, 2007Declaring a Varying Variable to be Flat#version 120flat varying float LightIntensity;const vec3 LightPos = vec3( 0., 10., 0. );void main( ){vec3 tnorm = normalize( gl_NormalMatrix * gl_Normal );vec3 ECposition = ( gl_ModelViewMatrix * gl_Vertex ).xyz;LightIntensity = dot( normalize(LightPos - ECposition), tnorm );LightIntensity = abs(LightIntensity );LightIntensity *= 1.5;gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;}#version 120flat varying float LightIntensity;uniform vec4 Color;voidmain( ){gl_FragColor = vec4( LightIntensity * Color.rgb, 1. );}flat.vertflat.frag2mjb – May 4, 2007Declaring a Varying Variable to be Flatvarying float LightIntensity;flat varying float LightIntensity;mjb – May 4, 2007Declaring a Varying Variable to be Flatvarying float LightIntensity;flat varying float
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