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refactor. ich habe den teil aus dem exampleSphere rausgezogen der generell gebraucht wird. displaySzene() nimmt eine szene an und lässt den raytracer fr jeden Pixel laufen

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any
2026-07-29 21:13:54 +02:00
parent fb44398c24
commit 1742d7d0f5
8 changed files with 90 additions and 63 deletions
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examples.c
+16 -52
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@@ -7,22 +7,23 @@
#include "vectorOp.h"
#include "raytrace.h"
#include <stdlib.h>
#include "interface.h"
void example_color(int width, int height, int channels, unsigned char *image) {
void example_color(int width, int height, int channels, unsigned char **image) {
for (int i = 0; i < height * width; i++) {
int step = i *channels;
int x = i % width;
int y = i / width;
image[step] = 0 + (int)((((double)x)/width) * 255);
image[step+1] = 0 + (int)((((double)y)/width) * 255);
image[step+2] = 0;
(*image)[step] = 0 + (int)((((double)x)/width) * 255);
(*image)[step+1] = 0 + (int)((((double)y)/width) * 255);
(*image)[step+2] = 0;
if (channels == 4) {
image[step+3] = 255;
(*image)[step+3] = 255;
}
}
}
void exampleSphere( int width, int height, int channels, unsigned char *image) {
void exampleSphere( int width, int height, int channels, unsigned char **image) {
camera cam1;
cam1.origin.x = 0;
cam1.origin.y = 0;
@@ -37,58 +38,21 @@ void exampleSphere( int width, int height, int channels, unsigned char *image) {
cam1.height = 1.080;
vec3 sphereOrigin = (vec3){0,0,5};
double sphereRadius = 1.0;
sphere obj1 = (sphere){sphereOrigin, sphereRadius};
sphere **objectList = (sphere **) calloc(4+1, sizeof(sphere*));;
sphere obj1 = (sphere){sphereOrigin, sphereRadius,(RGBA){1,0.5,1,1},0};
sphere **objectList = (sphere **) calloc(5+1, sizeof(sphere*));;
objectList[0] = &obj1;
sphere obj2 = (sphere){vec3Add(sphereOrigin, (vec3){3,0,0}), sphereRadius};
sphere obj2 = (sphere){vec3Add(sphereOrigin, (vec3){3,0,0}), sphereRadius, (RGBA){1,1,0.5,1},0};
objectList[1] = &obj2;
sphere obj3 = (sphere){vec3Add(sphereOrigin, (vec3){-3,0,0}), sphereRadius};
sphere obj3 = (sphere){vec3Add(sphereOrigin, (vec3){-2,1,0}), sphereRadius, (RGBA){1,1,1,1},0};
objectList[2] = &obj3;
sphere obj4 = (sphere){vec3Add(sphereOrigin, (vec3){1,1,3}), sphereRadius};
sphere obj4 = (sphere){vec3Add(sphereOrigin, (vec3){1,1,3}), sphereRadius, (RGBA){0.5,1,1,1},0};
objectList[3] = &obj4;
sphere light1 = (sphere){(vec3){2,1,0}, sphereRadius, (RGBA){1,1,1,1},1};
objectList[4] = &light1;
int objectCount = 5;
vec3 worldUp = (vec3){0, 1, 0};
vec3 screenX = vec3Cross(worldUp, cam1.direction);
vec3 screenY = vec3Cross(screenX, cam1.direction);
vec3 screenMiddlePoint = vec3Add(cam1.origin, vec3Scale(cam1.direction, cam1.screenDistance));
vec3 screenTopLeft = vec3Add(
vec3Add(screenMiddlePoint,
vec3Scale(screenY, -cam1.height/2.0)),///////////////////////////////////////////////////////////////////////////////////////////////////////////////aendern minus weg
vec3Scale(screenX, -cam1.width/2.0)
);
double pixelStepX = cam1.width / cam1.resolutionX;
double pixelStepY = cam1.height / cam1.resolutionY;
vec3 vecPixelStepX = vec3Scale(screenX, pixelStepX);
vec3 vecPixelStepY = vec3Scale(screenY, pixelStepY);
for (int i = 0; i < height * width; i++) {
int step = i *channels;
int x = i % width;
int y = i / width;
RGBA pixelColor;
vec3 *pixelOrigin = (vec3 *)malloc(sizeof(vec3));
*pixelOrigin = vec3Add(screenTopLeft,
vec3Add(
vec3Scale(vecPixelStepX, x),
vec3Scale(vecPixelStepY, y)
)
);
displaySzene(objectList, objectCount, cam1, width, height, channels, image);
ray *lightRay = (ray *)malloc(sizeof(ray));;
lightRay->origin = cam1.origin;
lightRay->direction = vec3Normalize(vec3Subtract(*pixelOrigin, cam1.origin));
pixelColor = raytraceSphere(objectList, lightRay);
free(pixelOrigin);
free(lightRay);
image[step] = (int)(pixelColor.r * 255.0);
image[step+1] = (int)(pixelColor.g * 255.0);
image[step+2] = (int)(pixelColor.b * 255.0);
if (channels == 4) {
image[step+3] = 255;
}
}
free(objectList);
}