public void Draw(RenderTarget target, RenderStates states)
{
MainWindow window = (MainWindow)target;
Vec3 vX = new Vec3(-20, 0, 0);
Vec3 vY = new Vec3(0, -20, 0);
Vec3 vZ = new Vec3(0, 0, -20);
Vec3 cameraCenter = new Vec3(target.Size.X / 2, target.Size.Y / 2, 0);
Camera sceneCamera = window.scenes.Peek().mainCamera;
Position = sceneCamera.Position;
Transform t = sceneCamera.InverseTransform * Transform;
t.Translate(cameraCenter);
vX = t * vX;
vY = t * vY;
vZ = t * vZ;
//vertices
Vertex[] vs = new Vertex[]
{
new Vertex(new Vector2f(vX.X, vX.Y), Color.Red),
new Vertex(new Vector2f(cameraCenter.X, cameraCenter.Y), Color.Red),
new Vertex(new Vector2f(vY.X, vY.Y), Color.Green),
new Vertex(new Vector2f(cameraCenter.X, cameraCenter.Y), Color.Green),
new Vertex(new Vector2f(vZ.X, vZ.Y), Color.Blue),
new Vertex(new Vector2f(cameraCenter.X, cameraCenter.Y), Color.Blue),
};
target.Draw(vs, PrimitiveType.Lines);
}
public override void Keys()
{
Transform t = Transform.Identity.Rotate(new Vec3(0, mainCamera.Rotation.Y, 0));
foreach (var key in pressedKeys)
{
switch (key)
{
//Moving
case Keyboard.Key.W:
mainCamera.Position += t * new Vec3(0, 0, Options.Instance.MovingSpeedPerSec * deltaTime.AsSeconds());
break;
case Keyboard.Key.S:
mainCamera.Position += t * new Vec3(0, 0, -Options.Instance.MovingSpeedPerSec * deltaTime.AsSeconds());
break;
case Keyboard.Key.A:
mainCamera.Position += t * new Vec3(Options.Instance.MovingSpeedPerSec * deltaTime.AsSeconds(), 0, 0);
break;
case Keyboard.Key.D:
mainCamera.Position += t * new Vec3(-Options.Instance.MovingSpeedPerSec * deltaTime.AsSeconds(), 0, 0);
break;
case Keyboard.Key.LShift:
mainCamera.Position += t * new Vec3(0, -Options.Instance.MovingSpeedPerSec * deltaTime.AsSeconds(), 0);
break;
case Keyboard.Key.Space:
mainCamera.Position += t * new Vec3(0, Options.Instance.MovingSpeedPerSec * deltaTime.AsSeconds(), 0);
break;
//camera tilt
case Keyboard.Key.Q:
mainCamera.Rotation += new Vec3(0, 0, Options.Instance.RotatingSpeedPerSec * deltaTime.AsSeconds());
break;
case Keyboard.Key.E:
mainCamera.Rotation -= new Vec3(0, 0, Options.Instance.RotatingSpeedPerSec * deltaTime.AsSeconds());
break;
}
}
}
public void RenderScene(Scene scene, RenderTarget target, RenderStates states)
{
//1.matworld * transform mesha razy trojkat
//2.przytniecie trojkatow kamerą(cos prawie jak culling frustrum ale o kacie 180 stopni)
//3.wybrac tylko te ktore sa skierowane twarza do kamery
//4.oswietlic wierzcholki trojkatow
//5.projekcja na kamere(matIntoView* matProj *trojkat)
//6.clip2D(czyli przyciac te ktore sa poza obrazem)
//7.narysowac trojkaty
//8.narysowac lightsource
//9.narysowac texture na target
uint width = target.Size.X;
uint height = target.Size.Y;
//init frame
ZBuffer = new float[width, height];
Bitmap = new Color[width, height];
Transform cameraInvMatrixAndWorld = scene.mainCamera.InverseTransform * scene.worldTransform;
Transform matView = Transform.Identity.Translate(new Vec3(1, 1, 0)).Scale(new Vec3(width / 2, height / 2, 1));
float fAspectRatio = height / (float)width;
float fFovRad = 1.0f / (float)Math.Tan(scene.mainCamera.Fov * 0.5f / 180.0f * Math.PI);
float[,] m = new float[4, 4];
m[0, 0] = fAspectRatio * fFovRad;
m[1, 1] = fFovRad;
m[2, 2] = scene.mainCamera.Far / (scene.mainCamera.Far - scene.mainCamera.Near);
m[3, 2] = (-scene.mainCamera.Far * scene.mainCamera.Near) / (scene.mainCamera.Far - scene.mainCamera.Near);
m[2, 3] = 1.0f;
m[3, 3] = 0.0f;
Transform matProj = new Transform(m);
Transform matProjAndView = matView * matProj;
Queue <Tri> sceneTriangles = new Queue <Tri>();
// collect all triangles
foreach (Drawable3D drawable in scene.drawables)
{
Mesh mesh = drawable.GetMesh(); // TODO: this should return already transformed mesh
foreach (Tri tri in mesh)
{
sceneTriangles.Enqueue(mesh.Transform * tri);
}
}
//1.
int c = sceneTriangles.Count;
for (int i = 0; i < c; i++)
{
Tri t = sceneTriangles.Dequeue();
sceneTriangles.Enqueue(cameraInvMatrixAndWorld * t);
}
//2.
for (int i = 0; i < c; i++)
{
Tri t = sceneTriangles.Dequeue();
List <Tri> clt = ClipAgainstPlane(new Vec3(0, 0, scene.mainCamera.Near), new Vec3(0, 0, 1), t);
foreach (var clippedTriangle in clt)
{
sceneTriangles.Enqueue(clippedTriangle);
}
}
c = sceneTriangles.Count;
//3.
for (int i = 0; i < c; i++)
{
Tri t = sceneTriangles.Dequeue();
if (t.NormalVector.Dot(t[0].Position) < 0)
{
sceneTriangles.Enqueue(t);
}
}
c = sceneTriangles.Count;
//4.
for (int i = 0; i < c; i++)
{
Tri t = sceneTriangles.Dequeue();
float[] Is = new float[3] {
0, 0, 0
};
// ILLUMINATION - Phong
Vec3 N = t.NormalVector;
float kd = t.kd;
float ks = t.ks;
float n = t.n;
foreach (LightSource lsrc in scene.lightSources)
{
Vec3 lightPos = cameraInvMatrixAndWorld * lsrc.Position;
for (int j = 0; j < 3; j++)
{
//camera position (0,0,0) - vertex position (after camerainverese)
Vec3 V = (-t[j].Position).Normal();
Vec3 L = (lightPos - t[j].Position).Normal();
Vec3 R = (-L - 2 * N.Dot(-L) * N).Normal();
float minus = (V.Dot(R) < 0) ? -1 : 1;
float I = lsrc.Intensity * (kd * N.Dot(L) + ks * minus * (float)Math.Pow(V.Dot(R), n));
Math.Max(I, 0);
Is[j] += I;
}
}
//ambient light 0.2
for (int j = 0; j < 3; j++)
{
Is[j] = Math.Max(Is[j], 0.2f);
}
Vec4 color0 = new Vec4(t[0].Color.R * Is[0], t[0].Color.G * Is[0], t[0].Color.B * Is[0], t[0].Color.A);
Vec4 color1 = new Vec4(t[1].Color.R * Is[1], t[1].Color.G * Is[1], t[1].Color.B * Is[1], t[1].Color.A);
Vec4 color2 = new Vec4(t[2].Color.R * Is[2], t[2].Color.G * Is[2], t[2].Color.B * Is[2], t[2].Color.A);
Vertex3 vert0 = new Vertex3(t[0].Position, color0);
Vertex3 vert1 = new Vertex3(t[1].Position, color1);
Vertex3 vert2 = new Vertex3(t[2].Position, color2);
sceneTriangles.Enqueue(new Tri(vert0, vert1, vert2, t.ks, t.kd, t.n));
}
//5.
for (int i = 0; i < c; i++)
{
Tri t = sceneTriangles.Dequeue();
sceneTriangles.Enqueue(matProjAndView * t);
}
//6.
for (int i = 0; i < c; i++)
{
Tri t = sceneTriangles.Dequeue();
Queue <Tri> qTris = new Queue <Tri>();
qTris.Enqueue(t);
int nNewTriangles = 1;
for (int p = 0; p < 4; p++)
{
while (nNewTriangles > 0)
{
Tri t2 = qTris.Dequeue();
nNewTriangles--;
List <Tri> clippedTriangles = new List <Tri>();
switch (p)
{
case 0:
clippedTriangles = ClipAgainstPlane(new Vec3(), new Vec3(0, 1, 0), t2);
break;
case 1:
clippedTriangles = ClipAgainstPlane(new Vec3(0, height - 1, 0), new Vec3(0, -1, 0), t2);
break;
case 2:
clippedTriangles = ClipAgainstPlane(new Vec3(), new Vec3(1, 0, 0), t2);
break;
case 3:
clippedTriangles = ClipAgainstPlane(new Vec3(width - 1, 0, 0), new Vec3(-1, 0, 0), t2);
break;
}
foreach (var item in clippedTriangles)
{
qTris.Enqueue(item);
}
}
nNewTriangles = qTris.Count;
}
foreach (var item in qTris)
{
sceneTriangles.Enqueue(item);
}
}
//7.
while (sceneTriangles.Count > 0)
{
Tri t = sceneTriangles.Dequeue();
if (Options.Instance.ShowWireframe)
{
//test zbuffer wireframe
DrawTriangle(t, PrimitiveType.LineStrip);
}
else
{
//test zbuffer fill
DrawTriangle(t, PrimitiveType.Triangles);
}
}
//8.
foreach (LightSource light in scene.lightSources)
{
Vec3 lpos = cameraInvMatrixAndWorld * light.Position;
if (lpos.Z > 0)
{
Vec3 lPosOnScreen = matProjAndView * lpos;
DrawPixel(lPosOnScreen, (Vec4)Color.White);
DrawPixel(lPosOnScreen + new Vec3(0, 1), (Vec4)Color.White);
DrawPixel(lPosOnScreen + new Vec3(1, 0), (Vec4)Color.White);
DrawPixel(lPosOnScreen + new Vec3(1, 1), (Vec4)Color.White);
}
}
//9.
Image img = new Image(Bitmap);
Texture texture = new Texture(img);
Sprite s = new Sprite(texture);
target.Draw(s, states);
s.Dispose();
texture.Dispose();
img.Dispose();
}