62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
#include <float.h>
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#include "rt_weekend.h"
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#include "sphere.h"
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#include "target_list.h"
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#include "camera.h"
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#include <stdio.h>
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vec3 color(const ray &r, target *world)
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{
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hit_record rec;
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if (world->hit(r, 0.0, MAXFLOAT, rec))
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{
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return 0.5 * vec3(rec.normal.x() + 1, rec.normal.y() + 1, rec.normal.z() + 1);
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}
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else
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{
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vec3 unit_direction = unit_vector(r.direction());
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float t = 0.5 * (unit_direction.y() + 1.0);
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return (1.0 - t) * vec3(1.0, 1.0, 1.0) + t * vec3(0.5, 0.7, 1.0);
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}
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}
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extern "C"
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void
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PluginUpdateAndRender(plugin_offscreen_buffer *Buffer, plugin_input *Input)
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{
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int ns = 1;
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int Pitch = Buffer->Pitch;
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uint8_t *Row = (uint8_t *)Buffer->Memory;
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target *list[2];
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list[0] = new sphere(vec3(0, 0, -1), 0.5);
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list[1] = new sphere(vec3(0, -100.5, -1), 100);
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target *world = new target_list(list, 2);
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camera cam;
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for(int j = Buffer->Height - 1; j >= 0; j--)
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{
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uint32_t *Pixel = (uint32_t *)Row;
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for(int i = 0; i < Buffer->Width; i++)
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{
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vec3 col(0, 0, 0);
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for (int s = 0; s < ns; s++)
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{
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float u = float(i + drand48()) / float(Buffer->Width);
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float v = float(j + drand48()) / float(Buffer->Height);
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ray r = cam.get_ray(u, v);
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vec3 p = r.point_at_parameter(2.0);
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col += color(r, world);
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}
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col /= float(ns);
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int ir = int(255.99 * col[0]);
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int ig = int(255.99 * col[1]);
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int ib = int(255.99 * col[2]);
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*Pixel++ = (ir << 24) + (ig << 16) + (ib << 8) + 0xFF;
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}
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Row += Pitch;
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}
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}
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