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# project and scale 3D object to 2d screen space

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Hi
I have a function that already project a 3d point into my screen whitch I want to share with you !

 Public Function GetScreenCoordBy3DPoint(ByRef RetX As Single, ByRef RetY As Single, ByRef Px As Single, ByRef Py As Single, ByRef Pz As Single, ByRef RetdistZ As Single) As Object Dim MatView As Matrix Dim matProj As Matrix Dim RetVec As Vector3 Dim Vec1 As Vector3 Vec1.X = Px Vec1.Y = Py Vec1.Z = Pz Dim tViewPort As Direct3D.Viewport ' DxVBLibA.D3DVIEWPORT8 Dim IdentMat As Matrix IdentMat = Matrix.Identity MatView = D3DDevice9.GetTransform(Direct3D.TransformType.View) matProj = D3DDevice9.GetTransform(Direct3D.TransformType.Projection) 'd3ddevice9.GetTransform D3DTS_WORLD, IdentMat tViewPort = D3DDevice9.Viewport RetVec = Vector3.Project(Vec1, tViewPort, matProj, MatView, IdentMat) RetX = RetVec.X RetY = RetVec.Y RetdistZ = RetVec.Z End Function 
I want to render a 3d mesh and prevent its scaling when it go far from camera
any suggestion how should I scale it ??
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sorry for bad EN

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Aren't you looking for an isometric transformation?

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You're looking for an orthographic or orthogonal projection
An isometric projection would be a projection where a unit is of equal length for all three projected axes, and where the angle between two adjacent projected axes is exactly 120°. Edited by Radikalizm

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