18 lines
478 B
C
18 lines
478 B
C
#include "structs.h"
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#include "collision.h"
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#include "vectorOp.h"
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RGBA raytraceSphere(sphere *obj, ray *lightray) {
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RGBA pixel;
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pixel.r = 0;
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pixel.g = 0;
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pixel.b = 0;
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pixel.a = 1;
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vec3 collisionPoint = collisionPointSphere(lightray, obj);
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if (collisionPoint.x == -1) {return pixel;}
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vec3 sphereNormal = vec3Normalize(vec3Subtract(collisionPoint, obj->origin));
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pixel.r = -vec3Product(sphereNormal, lightray->direction);
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return pixel;
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} |