/// <summary>
/// The main method of the engine that re-compute each vertex projection
/// during each frame
/// </summary>
/// <param name="camera"></param>
/// <param name="meshes"></param>
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.Up);
var projectionMatrix = Matrix.PerspectiveFovRH(0.78f,
(float)bmp.PixelWidth / bmp.PixelHeight,
0.01f, 1.0f);
for (var i = 0; i < meshes.Length; i++)
{
// Beware to apply rotation before translation
var worldMatrix = Matrix.RotationYawPitchRoll(meshes[i].Rotation.Y,
meshes[i].Rotation.X, meshes[i].Rotation.Z) *
Matrix.Translation(meshes[i].Position);
var transformMatrix = worldMatrix * viewMatrix * projectionMatrix;
//Iterate over the faces, get the vertices of each face and draw the lines between them
Parallel.For(0, meshes[i].Faces.Length, j =>
{
var pixelA = Project(meshes[i].Vertices[meshes[i].Faces[j].A], transformMatrix, worldMatrix);
var pixelB = Project(meshes[i].Vertices[meshes[i].Faces[j].B], transformMatrix, worldMatrix);
var pixelC = Project(meshes[i].Vertices[meshes[i].Faces[j].C], transformMatrix, worldMatrix);
var color = 0.25f + j % meshes[i].Faces.Length * 0.75f / meshes[i].Faces.Length;
DrawTriangle(pixelA, pixelB, pixelC, new Color
{
ScB = color,
ScG = color,
ScR = color,
ScA = 1f
}, meshes[i].Texture);
});
}
}
