57 lines
2.0 KiB
C
57 lines
2.0 KiB
C
//
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// Created by ary on 29.07.2026.
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//
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#include "interface.h"
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#include "examples.h"
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#include "structs.h"
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#include "vectorOp.h"
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#include "raytrace.h"
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#include <stdlib.h>
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#include "helper.h"
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void displaySzene(sphere **objectList, int objectCount, camera cam1, int width, int height, int channels, unsigned char **image) {
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const vec3 worldUp = (vec3){0, 1, 0};
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vec3 screenX = vec3Cross(worldUp, cam1.direction);
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vec3 screenY = vec3Cross(screenX, cam1.direction);
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vec3 screenMiddlePoint = vec3Add(cam1.origin, vec3Scale(cam1.direction, cam1.screenDistance));
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vec3 screenTopLeft = vec3Add(
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vec3Add(screenMiddlePoint,
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vec3Scale(screenY, -cam1.height/2.0)),///////////////////////////////////////////////////////////////////////////////////////////////////////////////aendern minus weg
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vec3Scale(screenX, -cam1.width/2.0)
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);
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double pixelStepX = cam1.width / cam1.resolutionX;
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double pixelStepY = cam1.height / cam1.resolutionY;
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vec3 vecPixelStepX = vec3Scale(screenX, pixelStepX);
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vec3 vecPixelStepY = vec3Scale(screenY, pixelStepY);
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for (int i = 0; i < height * width; i++) {
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int step = i *channels;
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int x = i % width;
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int y = i / width;
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RGBA pixelColor;
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vec3 *pixelOrigin = (vec3 *)malloc(sizeof(vec3));
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*pixelOrigin = vec3Add(screenTopLeft,
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vec3Add(
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vec3Scale(vecPixelStepX, x),
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vec3Scale(vecPixelStepY, y)
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)
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);
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ray *lightRay = (ray *)malloc(sizeof(ray));;
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lightRay->origin = cam1.origin;
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lightRay->direction = vec3Normalize(vec3Subtract(*pixelOrigin, cam1.origin));
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pixelColor = raytraceSphere(objectList, lightRay);
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free(pixelOrigin);
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free(lightRay);
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(*image)[step] = (int)(pixelColor.r * 255.0);
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(*image)[step+1] = (int)(pixelColor.g * 255.0);
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(*image)[step+2] = (int)(pixelColor.b * 255.0);
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if (channels == 4) {
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(*image)[step+3] = 255;
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}
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}
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} |