51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
#include <stdlib.h>
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#include "structs.h"
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#include "collision.h"
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#include "vectorOp.h"
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#define MAXSPHERES 100
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RGBA raytraceSphere(sphere **objectList, ray *lightray) {
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RGBA pixel = (RGBA){0,0,0,1};
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const int lightBounces = 1;
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sphere **spheresHitList = (sphere **)calloc( (lightBounces + 1),sizeof(sphere*) );
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int hitLightIndex = -1;
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vec3 sphereNormal;
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sphere *nearestSphere = nullptr;
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vec3 nearestCollisionPoint = {10000,10000,10000};
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for (int j = 0; j <= lightBounces; j++) {
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nearestSphere = nullptr;
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nearestCollisionPoint = (vec3){10000,10000,10000};
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for (int i = 0; i < 100 && objectList[i] != nullptr; i++) {
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vec3 collisionPoint = collisionPointSphere(lightray, objectList[i]);
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if (collisionPoint.x == -10000000) {
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}
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else{
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if (vec3Length(collisionPoint)< vec3Length(nearestCollisionPoint)) {
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nearestCollisionPoint = collisionPoint;
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nearestSphere = objectList[i];
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}
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}
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}
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if (nearestSphere != nullptr) {
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sphereNormal = vec3Normalize(vec3Subtract(nearestCollisionPoint, nearestSphere->origin));////////////////////////////// optimize divide by sphere radius instead
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lightray->direction = vec3Add(lightray->direction, vec3Scale(sphereNormal, 2));
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lightray->origin = nearestCollisionPoint;
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}
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else {
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sphereNormal = (vec3){1,1,1};
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}
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}
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//pixel.r = -vec3Product(sphereNormal, lightray->direction);
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pixel = (RGBA){1 - 0.5 *( sphereNormal.x + 1), 1 - 0.5 * (sphereNormal.y +1), 1 -0.5* (sphereNormal.z + 1),1};
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free(spheresHitList);
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return pixel;
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} |