Exemplo n.º 1
0
 public MainViewModel()
 {
     Current = this;
     Engine = new Engine(900,600);
     Cube = new Mesh("Cube", 8, 12);
     Tetra = new Mesh("Tetraedrum", 4, 4);
     Camera = new Camera();
     CreateMeshes();
 }
Exemplo n.º 2
0
        // The main method of the engine that re-compute each vertex projection
        // during each frame
        public void Render(Camera camera, Mesh mesh)
        {
            //First, we create the camera matrix.
            var viewMatrix = Matrix.LookAtLH(camera.Position, camera.Target, Vector3.UnitY);
            //Then, the projection matrix to add some perspective
            var projectionMatrix = Matrix.PerspectiveFovRH(0.78f,
                                                           (float)this.Bitmap.PixelWidth / this.Bitmap.PixelHeight,
                                                           0.01f, 1.0f);

            //Then the worldmatrix. Beware to apply rotation before translation
            //var worldMatrix = Matrix.RotationYawPitchRoll(mesh.Rotation.Y,
            //                                              mesh.Rotation.X, mesh.Rotation.Z) *
            //                  Matrix.Translation(mesh.Position);

            //Let's play with quaternions!
            var worldMatrix = QuaternionEngine.rotationMatrix(mesh.Rotation) *
                              Matrix.Translation(mesh.Position);
            //Final transformMatrix, remember to multiply backwards
            var transformMatrix = worldMatrix * viewMatrix * projectionMatrix;
            // This is where magic happens: transfomed vertex are projected on the screen. First we identify each face, then transform its vertex and later we draw them
            //and the lines that join them.
            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);
                var pixelB = Project(vertexB, transformMatrix);
                var pixelC = Project(vertexC, transformMatrix);

                DrawLine(pixelA, pixelB);
                DrawLine(pixelB, pixelC);
                DrawLine(pixelC, pixelA);
            }
        }