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project and scale 3D object to 2d screen space


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#1 hserver   Members   -  Reputation: 142

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Posted 11 November 2012 - 12:07 PM

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 ??
----
sorry for bad EN

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#2 cofruben   Members   -  Reputation: 141

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Posted 19 November 2012 - 03:15 AM

Aren't you looking for an isometric transformation?
Are you looking for a patcher, for your future MMOG? Check HPatcher! Visit http://cofruben.krusher.org

#3 Radikalizm   Crossbones+   -  Reputation: 2992

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Posted 19 November 2012 - 05:06 AM

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, 19 November 2012 - 05:08 AM.

I gets all your texture budgets!





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