void Init()
{
device = new Device(this.panel2.Width, this.panel2.Height);
mesh = new Mesh("Cube", 8,12);
mesh.Vertices[0] = new SharpDX.Vector3(-1, 1, 1);
mesh.Vertices[1] = new SharpDX.Vector3(1, 1, 1);
mesh.Vertices[2] = new SharpDX.Vector3(-1, -1, 1);
mesh.Vertices[3] = new SharpDX.Vector3(1, -1, 1);
mesh.Vertices[4] = new SharpDX.Vector3(-1, 1, -1);
mesh.Vertices[5] = new SharpDX.Vector3(1, 1, -1);
mesh.Vertices[6] = new SharpDX.Vector3(1, -1, -1);
mesh.Vertices[7] = new SharpDX.Vector3(-1, -1, -1);
mesh.Faces[0] = new Face { A = 0, B = 1, C = 2 };
mesh.Faces[1] = new Face { A = 1, B = 2, C = 3 };
mesh.Faces[2] = new Face { A = 1, B = 3, C = 6 };
mesh.Faces[3] = new Face { A = 1, B = 5, C = 6 };
mesh.Faces[4] = new Face { A = 0, B = 1, C = 4 };
mesh.Faces[5] = new Face { A = 1, B = 4, C = 5 };
mesh.Faces[6] = new Face { A = 2, B = 3, C = 7 };
mesh.Faces[7] = new Face { A = 3, B = 6, C = 7 };
mesh.Faces[8] = new Face { A = 0, B = 2, C = 7 };
mesh.Faces[9] = new Face { A = 0, B = 4, C = 7 };
mesh.Faces[10] = new Face { A = 4, B = 5, C = 6 };
mesh.Faces[11] = new Face { A = 4, B = 6, C = 7 };
camera = new Camera();
camera.Postion = new SharpDX.Vector3(0, 0, 10f);
camera.Target = SharpDX.Vector3.Zero;
}
// The main method of the engine that re-compute each vertex projection
// during each frame
public void Render(Camera camera, params Mesh[] meshes)
{
// To understand this part, please read the prerequisites resources
var viewMatrix = Matrix.LookAtLH(camera.Position, camera.Target, Vector3.UnitY);
var projectionMatrix = Matrix.PerspectiveFovRH(0.78f,
(float)bmp.PixelWidth / bmp.PixelHeight,
0.01f, 1.0f);
foreach (Mesh mesh in meshes)
{
// Beware to apply rotation before translation
var worldMatrix = Matrix.RotationYawPitchRoll(mesh.Rotation.Y, mesh.Rotation.X, mesh.Rotation.Z) *
Matrix.Translation(mesh.Position);
var transformMatrix = worldMatrix * viewMatrix * projectionMatrix;
/*
foreach (var vertex in mesh.Vertices)
{
// First, we project the 3D coordinates into the 2D space
var point = Project(vertex, transformMatrix);
// Then we can draw on screen
DrawPoint(point);
for (var i = 0; i < mesh.Vertices.Length - 1; i++)
{
var point0 = Project(mesh.Vertices[i], transformMatrix);
var point1 = Project(mesh.Vertices[i + 1], transformMatrix);
DrawLine(point0, point1);
}
}
*/
var faceIndex = 0;
foreach (var face in mesh.Faces)
{
var vertexA = mesh.Vertices[face.A];
var vertexB = mesh.Vertices[face.B];
var vertexC = mesh.Vertices[face.C];
var pixelA = Project(vertexA, transformMatrix, worldMatrix);
var pixelB = Project(vertexB, transformMatrix, worldMatrix);
var pixelC = Project(vertexC, transformMatrix, worldMatrix);
var color = 0.25f + (faceIndex % mesh.Faces.Length) * 0.75f / mesh.Faces.Length;
DrawTriangle(pixelA, pixelB, pixelC, new Color4(color, color, color, 1));
faceIndex++;
}
}
}
public void Render(Camera camera,params Mesh[] meshes)
{
var viewMatrix = Matrix.LookAtLH(camera.Postion, camera.Target, Vector3.UnitY);
var projectionMatrx = Matrix.PerspectiveFovLH(0.78f, (float)m_backBuffer.Width / m_backBuffer.Height,
0.01f, 1.0f);
foreach(Mesh mesh in meshes)
{
var worldMatrix = Matrix.RotationYawPitchRoll(mesh.Rotation.Y, mesh.Rotation.X, mesh.Rotation.Z) *
Matrix.Translation(mesh.Postion);
var transMat = worldMatrix * viewMatrix * projectionMatrx;
foreach(var face in mesh.Faces)
{
var vertexA = mesh.Vertices[face.A];
var vertexB = mesh.Vertices[face.B];
var vertexC = mesh.Vertices[face.C];
var pixelA = Project(vertexA, transMat);
var pixelB = Project(vertexB, transMat);
var pixelC = Project(vertexC, transMat);
BresenhamDrawLine(pixelA, pixelB);
BresenhamDrawLine(pixelB, pixelC);
BresenhamDrawLine(pixelC, pixelA);
}
}
}
