public static Matrix PointAtMatrix(Vec3D pos, Vec3D target, Vec3D up)
{
// ny frammåt
Vec3D newForward = target - pos;
newForward.Normalize();
// ny uppåt
Vec3D a = newForward * Vec3D.Dot(up, newForward);
Vec3D newUp = up - a;
newUp.Normalize();
Vec3D newRight = Vec3D.Cross(newUp, newForward);
Matrix mat = new Matrix();
mat.m[0, 0] = newRight.x; mat.m[0, 1] = newRight.y; mat.m[0, 2] = newRight.z; mat.m[0, 3] = 0.0f;
mat.m[1, 0] = newUp.x; mat.m[1, 1] = newUp.y; mat.m[1, 2] = newUp.z; mat.m[1, 3] = 0.0f;
mat.m[2, 0] = newForward.x; mat.m[2, 1] = newForward.y; mat.m[2, 2] = newForward.z; mat.m[2, 3] = 0.0f;
mat.m[3, 0] = pos.x; mat.m[2, 1] = pos.y; mat.m[2, 2] = pos.z; mat.m[2, 3] = 1.0f;
return(mat);
}
public override void Create()
{
Engine.SetPalette(Palettes.Pico8);
Engine.SetBackground(0);
Engine.Borderless();
Console.Title = "3D Demo";
mesh.LoadFromObj("monkey.obj");
consoleWidth = Engine.WindowSize.X;
consoleHeight = Engine.WindowSize.Y;
// projektions matris
float near = 0.1f;
float far = 1000.0f;
float fov = 90.0f;
float aspectRatio = (float)consoleHeight / (float)consoleWidth;
projectionMatrix = Matrix.ProjectionMatrix(fov, aspectRatio, near, far);
// normaliserar ljusriktningen
lightDirection.Normalize();
}