252 lines
7.9 KiB
C#
Executable File
252 lines
7.9 KiB
C#
Executable File
using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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using static RaytracerEngine.hitable;
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namespace RaytracerEngine
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{
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public partial class Form1 : Form
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{
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vec3 origin;
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vec3 lower_left_corner;
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vec3 horizontal;
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vec3 vertical;
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List<hitable> objects;
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Bitmap bmp;
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LockBitmap dbm;
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int nx = 200;
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int ny = 100;
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int ns = 3;
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bool left;
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bool right;
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bool fore;
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bool back;
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bool look_left;
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bool look_right;
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Random rnd;
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float rand { get{ return (float)rnd.NextDouble();}}
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public Form1()
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{
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InitializeComponent();
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//DoubleBuffered = true;
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left = false;
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right = false;
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fore = false;
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back = false;
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look_left = false;
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look_right = false;
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origin = new vec3(0, 0, 0);
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lower_left_corner = new vec3(-2.0f, -1.0f, -1.0f);
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horizontal = new vec3(4.0f, 0.0f, 0.0f);
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vertical = new vec3(0.0f, 2.0f, 0.0f);
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objects = new List<hitable>();
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//OLD VERSION
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//lower_left_corner = new vec3(-2.0f, -1.0f, -1.0f);
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//horizontal = new vec3(4.0f, 0.0f, 0.0f);
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//vertical = new vec3(0.0f, 2.0f, 0.0f);
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lower_left_corner = new vec3(2.0f, 1.0f, -1.0f);
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horizontal = new vec3(-4.0f, 0.0f, 0.0f);
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vertical = new vec3(0.0f, -2.0f, 0.0f);
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objects = new List<hitable>();
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//objects.Add(new sphere(new vec3(0, 0, -1.0f), 0.5f));
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//objects.Add(new sphere(new vec3(0, -100.5f, -1f), 100f));
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objects.Add(new sphere(new vec3(0, 0, -16), 2));
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objects.Add(new sphere(new vec3(3, -1, -14), 1));
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objects.Add(new sphere(new vec3(-3, -1, -14), 1));
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objects.Add(new triangle(new vec3(-8, -2, -20), new vec3(8, -2, -20), new vec3(8, 10, -20), 0));
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objects.Add(new triangle(new vec3(-8, -2, -20), new vec3(8, 10, -20), new vec3(-8, 10, -20), 0));
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objects.Add(new triangle(new vec3(-8, -2, -20), new vec3(8, -2, -10), new vec3(8, -2, -20), 0));
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objects.Add(new triangle(new vec3(-8, -2, -20), new vec3(-8, -2, -10), new vec3(8, -2, -10), 0));
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objects.Add(new triangle(new vec3(8, -2, -20), new vec3(8, -2, -10), new vec3(8, 10, -20), 0));
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bmp = new Bitmap(nx, ny);
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dbm = new LockBitmap(bmp);
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rnd = new Random();
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timer1.Interval = 10;
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}
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protected override void OnLoad(EventArgs e)
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{
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timer1.Start();
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base.OnLoad(e);
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}
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protected override void OnClosed(EventArgs e)
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{
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bmp.Dispose();
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timer1.Stop();
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base.OnClosed(e);
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}
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vec3 color(ray r, int reflect)
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{
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bool hit_any = false;
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hit_record temp_rec = new hit_record();
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hit_record rec = new hit_record();
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float closest = float.MaxValue;
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foreach(var o in objects)
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{
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if (o.hit(r, 0.001f, closest, out temp_rec))
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{
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hit_any = true;
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closest = temp_rec.t;
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rec = temp_rec;
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}
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}
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if (hit_any && reflect>0)
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{
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vec3 target = rec.p + rec.normal; //+ random_unit_in_sphere();
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return 0.5f * color(new ray(rec.p, target - rec.p), --reflect);
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}
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vec3 unit_dir = vec3.unit_vector(r.direction);
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float t = 0.5f * (unit_dir.y + 1.0f);
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return (1.0f - t) * new vec3(1.0f, 1.0f, 1.0f) + t * new vec3(0.5f, 0.7f, 1.0f);
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}
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private vec3 random_unit_in_sphere()
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{
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vec3 p;
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float o = 0f;
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do
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{
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p = 2.0f * new vec3(rand, rand, rand) - new vec3(1,1,1);
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o = p.square_length();
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} while (o >= 1f);
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return p;
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}
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private void draw_scene()
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{
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dbm.LockBits();
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for (int j = ny - 1; j >= 0; j--)
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{
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for (int i = 0; i < nx; i++)
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{
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vec3 col = new vec3(0, 0, 0);
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float u = (float)i / (float)nx;
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float v = (float)j / (float)ny;
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//for (int s = 0; s < ns; s++)
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//{
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// float u = (float)(i + rand) / (float)nx;
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// float v = (float)(j + rand) / (float)ny;
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ray r = new ray(origin, lower_left_corner + u * horizontal + v * vertical);
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col = color(r, 4);
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//}
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//col /= (float)ns;
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int ir = (int)(255.99 * col.r);
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int ig = (int)(255.99 * col.g);
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int ib = (int)(255.99 * col.b);
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dbm.SetPixel(i, j, Color.FromArgb(255, (byte)ir, (byte)ig, (byte)ib));
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}
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}
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dbm.UnlockBits();
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pictureBox1.Image = bmp;
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}
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private void timer1_Tick(object sender, EventArgs e)
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{
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const float scale = 0.7f;//for 'walking' speed
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vec3 forwards_back = vec3.cross(horizontal, vertical);
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forwards_back.normalize();
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vec3 left_right = vec3.cross(vertical, forwards_back);
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left_right.normalize();
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if (left)
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origin = origin - left_right * scale;
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if (right)
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origin = origin + left_right * scale;
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if (fore)
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origin = origin - forwards_back * scale;
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if (back)
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origin = origin + forwards_back * scale;
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if (look_left)
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{
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//rotational matrix on camera left 25*
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lower_left_corner = vec3.turn_y(lower_left_corner, ((float)Math.PI / 16));
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horizontal = vec3.turn_y(horizontal, ((float)Math.PI / 16));
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vertical = vec3.turn_y(vertical, ((float)Math.PI / 16));
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}
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if (look_right)
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{
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//rotational matrix on camera right 25*
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lower_left_corner = vec3.turn_y(lower_left_corner, -((float)Math.PI / 16));
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horizontal = vec3.turn_y(horizontal, -((float)Math.PI / 16));
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vertical = vec3.turn_y(vertical, -((float)Math.PI / 16));
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}
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draw_scene();
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pictureBox1.Refresh();
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}
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protected override void OnPaint(PaintEventArgs e)
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{
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draw_scene();
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base.OnPaint(e);
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}
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protected override void OnKeyDown(KeyEventArgs e)
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{
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if (e.KeyValue == 'A')
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left = true;
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if (e.KeyValue == 'D')
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right = true;
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if (e.KeyValue == 'W')
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fore = true;
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if (e.KeyValue == 'S')
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back = true;
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if (e.KeyValue == 'Q')
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look_left = true;
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if (e.KeyValue == 'E')
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look_right = true;
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base.OnKeyDown(e);
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}
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protected override void OnKeyUp(KeyEventArgs e)
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{
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if (e.KeyValue == 'A')
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left = false;
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if (e.KeyValue == 'D')
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right = false;
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if (e.KeyValue == 'W')
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fore = false;
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if (e.KeyValue == 'S')
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back = false;
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if (e.KeyValue == 'Q')
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look_left = false;
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if (e.KeyValue == 'E')
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look_right = false;
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base.OnKeyUp(e);
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}
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}
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}
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