Refactor

code ist jetzt schner aber ich habe durch einen pointer fehler in raytrace.c (nearestObject = &currentObject //zeigt immer auf die selbne adresse)
ein art negativ bild erzeugt

examples.c

@@ -39,25 +39,24 @@ void exampleSphere( int width, int height, int channels, unsigned char **image)
     vec3 sphereOrigin = (vec3){0,-1.5,5};
     double sphereRadius = 1.0;
     int objectCount = 7;
-    sphere obj1 = (sphere){sphereOrigin, sphereRadius,(RGBA){1,0.5,1,1},0};
+    object objectList[objectCount];
-    sphere **objectList = (sphere **) calloc(objectCount+1, sizeof(sphere*));;
+    sphere obj1 = (sphere){sphereOrigin, sphereRadius,(RGBA){1,0.5,1,1}};
-    objectList[0] = &obj1;
+    objectList[0] = (object){0, &obj1, 0};
-    sphere obj2 = (sphere){vec3Add(sphereOrigin, (vec3){3,0,0}), sphereRadius,  (RGBA){1,1,0.5,1},0};
+    sphere obj2 = (sphere){vec3Add(sphereOrigin, (vec3){3,0,0}), sphereRadius,  (RGBA){1,1,0.5,1}};
-    objectList[1] = &obj2;
+    objectList[1] = (object){0, &obj2, 0};
-    sphere obj3 = (sphere){vec3Add(sphereOrigin, (vec3){-2,1,0}), sphereRadius, (RGBA){1,1,1,1},0};
+    sphere obj3 = (sphere){vec3Add(sphereOrigin, (vec3){-2,1,0}), sphereRadius, (RGBA){1,1,1,1}};
-    objectList[2] = &obj3;
+    objectList[2] = (object){0, &obj3, 0};
-    sphere obj4 = (sphere){vec3Add(sphereOrigin, (vec3){1,1,3}), sphereRadius, (RGBA){0.5,1,1,1},0};
+    sphere obj4 = (sphere){vec3Add(sphereOrigin, (vec3){1,1,3}), sphereRadius, (RGBA){0.5,1,1,1}};
-    objectList[3] = &obj4;
+    objectList[3] = (object){0, &obj4, 0};
-    sphere light1 = (sphere){(vec3){1,1,4.5}, sphereRadius, (RGBA){1,1,1,1},1};
+    sphere light1 = (sphere){(vec3){1,1,4.5}, sphereRadius, (RGBA){1,1,1,1}};
-    objectList[4] = &light1;
+    objectList[4] = (object){0, &light1, 1};
-    sphere obj5 = (sphere){(vec3){0, -6, 6.5}, 5, (RGBA){1,0.2,0.6,1},0};
+    sphere obj5 = (sphere){(vec3){0, -6, 6.5}, 5, (RGBA){1,0.2,0.6,1}};
-    objectList[5] = &obj5;
+    objectList[5] = (object){0, &obj5, 0};
-    sphere light2 = (sphere){(vec3){1,-2,4}, sphereRadius, (RGBA){1,1,1,1},1};
+    sphere light2 = (sphere){(vec3){1,-2,4}, sphereRadius, (RGBA){1,1,1,1}};
-    objectList[6] = &light2;
+    objectList[6] = (object){0, &light2, 1};
 
 
 
     displaySzene(objectList, objectCount, cam1, width, height, channels, image);
 
-    free(objectList);
 }

interface.c

@@ -10,7 +10,7 @@
 #include <stdlib.h>
 #include "helper.h"
 
-void displaySzene(sphere **objectList, int objectCount, camera cam1, int width, int height, int channels, unsigned char **image) {
+void displaySzene(object objectList[], int objectCount, camera cam1, int width, int height, int channels, unsigned char **image) {
     const vec3 worldUp = (vec3){0, 1, 0};
     vec3 screenX = vec3Cross(worldUp, cam1.direction);
     vec3 screenY = vec3Cross(screenX, cam1.direction);
@@ -43,7 +43,7 @@ void displaySzene(sphere **objectList, int objectCount, camera cam1, int width,
 
         lightRay->direction = vec3Normalize(vec3Subtract(*pixelOrigin, cam1.origin));
 
-        pixelColor = raytraceSphere(objectList, lightRay);
+        pixelColor = getPixelColor(objectList,objectCount, lightRay);
         free(pixelOrigin);
         free(lightRay);
 

interface.h

@@ -1,4 +1,4 @@
 #pragma once
 #include "structs.h"
 
-void displaySzene(sphere **objectList, int objectCount, camera cam1, int width, int height, int channels, unsigned char **image);
+void displaySzene(object objectList[], int objectCount, camera cam1, int width, int height, int channels, unsigned char **image);

raytrace.c

@@ -2,124 +2,29 @@
 #include "structs.h"
 #include "collision.h"
 #include "vectorOp.h"
-#define MAXSPHERES 100
+#define MAXOBJECTS 100
+#define BADPOINT (vec3){-10000000,-10000000,-10000000}
 #include "helper.h"
 #include <math.h>
 #define epsilon 1e-8
+#define lightBounces 3
+enum objectType {
+    SPHERETYPE,
+    QUADTYPE
+};
 
-RGBA raytraceSphere(sphere **sphereList, int sphereCount, quad **quadList, int quadCount, ray *lightray) {
+RGBA getRayColor(RGBA colorList[], bool isLightList[]) {
-    RGBA pixel = (RGBA){0,0,0,0};
-    #define lightBounces 3
-    //sphere **spheresHitList = (sphere **)calloc( (lightBounces + 1),sizeof(sphere*) );
-    //vec3 *spheresNormalList = (vec3 *)calloc( lightBounces + 1,sizeof(vec3) );
-    int hitLightIndex = -1;
-    vec3 sphereNormal;
-    int raysPerPixel = 20;
-    ray originalRay = *lightray;
-
-    for (int k = 0; k < raysPerPixel; k++) {
-        sphere *spheresHitList[lightBounces + 1] = {0};
-        quad *quadHitList[lightBounces + 1] = {0};
-        vec3 spheresNormalList[lightBounces + 1] = {0};
-        *lightray = originalRay;
-        RGBA tempPixel = (RGBA){1,1,1,1};
-        sphere *nearestSphere = nullptr;
-        quad *nearestQuad = nullptr;
-        vec3 nearestCollisionPoint = {10000,10000,10000};
-        RGBA objectColorList[lightBounces + 1] = {0};
-
-
-        for (int j = 0; j <= lightBounces; j++) {
-            nearestSphere = nullptr;
-            double nearestSphereDistance = 10000000;
-            nearestQuad = nullptr;
-            double nearestQuadDistance = 10000000;
-            nearestCollisionPoint = (vec3){10000,10000,10000};
-
-            for (int i = 0; i < sphereCount; i++) {
-                vec3 collisionPoint = collisionPointSphere(lightray, sphereList[i]);
-                double collisionPointDistance = 1000000;
-                if (collisionPoint.x == -10000000) {
-
-                }
-                else{
-                    collisionPointDistance = vec3Length(vec3Subtract(collisionPoint, lightray->origin));
-                    if (collisionPointDistance < vec3Length(vec3Subtract(nearestCollisionPoint, lightray->origin))) {
-                        nearestCollisionPoint = collisionPoint;
-                        nearestSphere = sphereList[i];
-                        nearestSphereDistance = collisionPointDistance;
-                    }
-
-                }
-            }
-
-            for (int i = 0; i < quadCount; i++) {
-                vec3 collisionPoint = collisionQuad(lightray, quadList[i]);
-                double collisionPointDistance = 1000000;
-                if (collisionPoint.x == -10000000) {
-
-                }
-                else{
-                    collisionPointDistance = vec3Length(vec3Subtract(collisionPoint, lightray->origin));
-                    if (collisionPointDistance < vec3Length(vec3Subtract(nearestCollisionPoint, lightray->origin))) {
-                        nearestCollisionPoint = collisionPoint;
-                        nearestQuad = quadList[i];
-                        nearestQuadDistance = collisionPointDistance;
-                    }
-
-                }
-            }
-            if (nearestQuadDistance > nearestSphereDistance) {
-                if (nearestSphere != nullptr) {
-                    objectColorList[j] = nearestSphere->color;
-                    spheresHitList[j] = nearestSphere;
-                    sphereNormal = vec3Scale(vec3Subtract(nearestCollisionPoint, nearestSphere->origin), 1/(nearestSphere->radius));////////////////////////////// optimize, schreibe divide vector funktion
-                    spheresNormalList[j] = sphereNormal;
-                    //diffus:
-                    lightray->direction = vec3Add(sphereNormal, randUnitVector());
-                    if (fabs(lightray->direction.x ) <= epsilon || fabs(lightray->direction.y ) <= epsilon || fabs(lightray->direction.z) <= epsilon) {
-                        lightray->direction = sphereNormal;
-                    }
-                    //reflektion:
-                    //lightray->direction = vec3Add(lightray->direction, vec3Scale(sphereNormal, 2));
-                    lightray->origin = nearestCollisionPoint;
-                }
-                else {
-                    sphereNormal = (vec3){1,1,1};
-                }
-            }
-            else {
-
-                if (nearestQuad != nullptr) {
-                    objectColorList[j] = nearestQuad->color;
-                    quadHitList[j] = nearestQuad;
-                    //diffus:
-                    lightray->direction = vec3Add(nearestQuad->normal, randUnitVector());
-                    if (fabs(lightray->direction.x ) <= epsilon || fabs(lightray->direction.y ) <= epsilon || fabs(lightray->direction.z) <= epsilon) {
-                        lightray->direction = nearestQuad->normal;
-                    }
-                    //reflektion:
-                    //lightray->direction = vec3Add(lightray->direction, vec3Scale(sphereNormal, 2));
-                    lightray->origin = nearestCollisionPoint;
-                }
-                else {
-                    //sphereNormal = (vec3){1,1,1};
-                }
-            }
-
-
-
-        }
-
     int firstLightHitIndex = -1;
-        for (int i = 0; i <= lightBounces && spheresHitList[i] != nullptr; i++) {
+    RGBA rayColor = {1,1,1,1};
-            if (spheresHitList[i]->isLight == 1) {
+    for (int i = 0; i <= lightBounces; i++) {
+        if (isLightList[i] == 1) {
             firstLightHitIndex = i;
             break;
         }
     }
+
     if (firstLightHitIndex == -1) {
-            tempPixel = (RGBA){0,0,0,1};
+        rayColor = (RGBA){0,0,0,1};
     }
     else
     {
@@ -128,30 +33,114 @@ RGBA raytraceSphere(sphere **sphereList, int sphereCount, quad **quadList, int q
         //pixel.b += spheresHitList[firstLightHitIndex]->color.b;
         //pixel.a += spheresHitList[firstLightHitIndex]->color.a;
         for (int i = firstLightHitIndex; i >= 0; i--) {
-                tempPixel.r = tempPixel.r * spheresHitList[i]->color.r;
+            rayColor.r = rayColor.r * colorList[i].r;
-                tempPixel.g = tempPixel.g * spheresHitList[i]->color.g;
+            rayColor.g = rayColor.g * colorList[i].g;
-                tempPixel.b = tempPixel.b * spheresHitList[i]->color.b;
+            rayColor.b = rayColor.b * colorList[i].b;
-                tempPixel.a = tempPixel.a * spheresHitList[i]->color.a;
+            //rayColor.a = rayColor.a * colorList[i].a;
         }
-            pixel.r += tempPixel.r;
-            pixel.g += tempPixel.g;
-            pixel.b += tempPixel.b;
-            pixel.a += tempPixel.a;
 
         //pixel.r = -vec3Product(sphereNormal, lightray->direction);
         //pixel = (RGBA){1 - 0.5 *( sphereNormal.x + 1), 1 - 0.5 * (sphereNormal.y +1), 1 -0.5* (sphereNormal.z + 1),1};
+
+        return rayColor;
     }
+}
+
+RGBA raytrace(object objectList[], int objectCount, ray *lightray) {
+    RGBA objectColorList[lightBounces + 1] = {0};
+    object objectHitList[lightBounces + 1] = {0};
+    bool isLightList[lightBounces + 1] = {false};
+
+     for (int j = 0; j <= lightBounces; j++) {
+         object currentObject;
+         object *nearestObject = nullptr;
+         double nearestObjectDistance = 10000000;
+         vec3 nearestCollisionPoint = (vec3){10000,10000,10000};
+         double nearestCollisionPointDistance = 10000000;
+
+
+
+
+         for (int i = 0; i < objectCount; i++) {
+             currentObject = objectList[i];
+             vec3 collisionPoint;
+
+             switch (currentObject.objectType) {
+                 case SPHERETYPE:
+                     collisionPoint = collisionPointSphere(lightray, (sphere*)(objectList[i].objectPointer));
+                     break;
+                 case QUADTYPE:
+                     collisionPoint = collisionQuad(lightray, (quad*)(objectList[i].objectPointer));
+                     break;
+             }
+
+             double collisionPointDistance = 1000000;
+             if (collisionPoint.x != BADPOINT.x) {
+                 collisionPointDistance = vec3Length(vec3Subtract(collisionPoint, lightray->origin));
+                 if (collisionPointDistance < nearestCollisionPointDistance) {
+                     nearestCollisionPoint = collisionPoint;
+                     nearestCollisionPointDistance = collisionPointDistance;
+                     nearestObject = &currentObject;
+                 }
+             }
+         }
+
+         vec3 objectNormal = BADPOINT;
+         if (nearestObject != nullptr) {
+             switch (nearestObject->objectType) {
+                 case SPHERETYPE:
+                     sphere *nearestSphere = (sphere*)(nearestObject->objectPointer);
+                     objectColorList[j] = nearestSphere->color;
+                     objectNormal = vec3Scale(vec3Subtract(nearestCollisionPoint, nearestSphere->origin), 1/(nearestSphere->radius));////////////////////////////// optimize, schreibe divide vector funktion
+                     break;
+                 case QUADTYPE:
+                     quad *nearestQuad = (quad*)(nearestObject->objectPointer);
+                     objectColorList[j] = nearestQuad->color;
+                     objectNormal = nearestQuad->normal;
+                     break;
+             }
+             objectHitList[j] = *nearestObject;
+             isLightList[j] = nearestObject->isLight;
+
+             //diffus:
+             lightray->direction = vec3Normalize(vec3Add(objectNormal, randUnitVector()));  //maybe kann man sich durch umstrukturierung das normalisieren einsparen
+             if (fabs(lightray->direction.x ) <= epsilon || fabs(lightray->direction.y ) <= epsilon || fabs(lightray->direction.z) <= epsilon) {
+                 lightray->direction = objectNormal;
+             }
+             //reflektion:
+             //lightray->direction = vec3Add(lightray->direction, vec3Scale(sphereNormal, 2));
+             lightray->origin = nearestCollisionPoint;
+         }
+     }
+    return getRayColor(objectColorList, isLightList);
+
+}
+
+
+RGBA getPixelColor(object objectList[], int objectCount, ray *lightray) {
+    RGBA pixel = (RGBA){0,0,0,0};
+    int raysPerPixel = 2;
+    ray originalRay = *lightray;
+
+    for (int k = 0; k < raysPerPixel; k++) {
+        *lightray = originalRay;
+
+        RGBA tempPixel = raytrace(objectList, objectCount, lightray);
+
+        pixel.r += tempPixel.r;
+        pixel.g += tempPixel.g;
+        pixel.b += tempPixel.b;
+        //pixel.a += tempPixel.a;
     }
 
     //average pixelData
     pixel.r = pixel.r / raysPerPixel;
     pixel.g = pixel.g / raysPerPixel;
     pixel.b = pixel.b / raysPerPixel;
-    pixel.a = pixel.a / raysPerPixel;
+    //pixel.a = pixel.a / raysPerPixel;
 
 
     //free(spheresHitList);
     //free(spheresNormalList);
     return pixel;
-
 }

raytrace.h

@@ -1,4 +1,8 @@
 #pragma once
 #include "structs.h"
 
-RGBA raytraceSphere(sphere **, ray *);
+RGBA getPixelColor(object [], int, ray *);
+
+RGBA raytrace(object [], int, ray *);
+
+RGBA getRayColor(RGBA [], bool []);

structs.h

@@ -32,7 +32,6 @@ struct sphere {
     vec3 origin;
     double radius;
     RGBA color;
-    int isLight;
 }; typedef struct sphere sphere;
 
 struct plane {
@@ -46,5 +45,10 @@ struct quad {
     vec3 v2;
     vec3 normal;
     RGBA color;
-    int isLight;
 }; typedef struct quad quad;
+
+struct object {
+    int objectType; // 0 = sphere, 1 = Quad
+    void *objectPointer;
+    bool isLight;
+}; typedef struct object object;