private void Form1_Load(object sender, EventArgs e)
{
//摄像头
Point3D cameraPos = new Point3D(0, 0, -4);
//球
Sphere sphere1 = new Sphere(new Point3D(0, -31, 1), 30);
sphere1.Metiral.Color = new Color3D(1, 0, 0);
sphere1.Metiral.Kd = 1;
sphere1.Metiral.Ks = 0.3;
sphere1.Metiral.Ns = 20;
Sphere sphere2 = new Sphere(new Point3D(0.8, 0, 1), 0.1);
sphere2.Metiral.Color = new Color3D(0, 1, 0);
sphere2.Metiral.Kd = 1.0;
sphere2.Metiral.Ks = 0.3;
sphere2.Metiral.Ns = 20;
Sphere sphere3 = new Sphere(new Point3D(-1.2, 0, 1), 0.5);
sphere3.Metiral.Color = new Color3D(0, 0, 1);
sphere3.Metiral.Kd = 1.0;
sphere3.Metiral.Ks = 0.3;
sphere3.Metiral.Ns = 20;
//添加场景
Scenes scenes = new Scenes();
scenes.Add(sphere1);
scenes.Add(sphere2);
scenes.Add(sphere3);
//成像平面
ViewPlane vp = new ViewPlane();
vp.LeftTopCorner = new Point3D(-2, 1, 1);
vp.Width = 4;
vp.Height = 2;
vp.ResW = 800;
vp.ResH = 400;
//光源的位置
Point3D lightPos = new Point3D(3, -4, 6);
//光源的强度
Color3D lightColor = new Color3D(0.4);
//环境光
Color3D ambientColor = new Color3D(1);
double ka = 0.1;
double xOffset = vp.GetxOffset();
double yOffset = vp.GetyOffset();
bmp = new Bitmap(vp.ResW, vp.ResH);
for (int i = 0; i < vp.ResW; i++)
{
for (int j = 0; j < vp.ResH; j++)
{
//计算成像平面上的每一个像素点坐标
Point3D vpPoint = new Point3D(-2 + i * xOffset, 1 - j * yOffset, vp.LeftTopCorner.Z);
//方向
Vector3D dir = vpPoint - cameraPos;
//初始光线
Ray primaryRay = new Ray(cameraPos, dir);
//计算交点
HitRecord hitRecord = primaryRay.HitScenes(scenes);
if (hitRecord.IsHit)
{
//交点到光源的方向
Vector3D L = hitRecord.HitPoint - lightPos;
L.Nomalize();
double cosTheta = (L * hitRecord.Nomal) / Math.Sqrt(L.Length() * L.Length() + hitRecord.Nomal.Length() * hitRecord.Nomal.Length());
//double cosTheta = (L * hitRecord.Nomal);
if (cosTheta > 0)
{
cosTheta = 0;
}
//交点到眼睛方向
Vector3D V = hitRecord.HitPoint - cameraPos;
V.Nomalize();
//阴影光线
Ray shadowRay = new Ray(hitRecord.HitPoint, L);
if (shadowRay.shadowHitScenes(scenes) == false)
{
//镜面反射光路
Vector3D R = 2 * hitRecord.Nomal * (hitRecord.Nomal * L) - L;
R.Nomalize();
//计算漫反射颜色+环境光+镜面反射
Color3D diffuseColor = ka * ambientColor
+ hitRecord.Metiral.Kd * hitRecord.Metiral.Color * lightColor * (L * hitRecord.Nomal)
//+ hitRecord.Metiral.Kd * hitRecord.Metiral.Color * lightColor * cosTheta
+ hitRecord.Metiral.Ks * hitRecord.Metiral.Color * lightColor * Math.Pow((V * R), hitRecord.Metiral.Ns);
bmp.SetPixel(i, j, diffuseColor.ToSystemColor());
}
else
{
bmp.SetPixel(i, j, Color.Black);
}
}
else
{
bmp.SetPixel(i, j, Color.Gray);
}
}
}
pictureBox1.BackgroundImage = bmp;
}
