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erik rostock

Project a grid in screenspace on the world xz plane.

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Hi, I want to project a grid on the xz-plane like shown here: http://habibs.files.wordpress.com/2009/07/2-1.jpg To do that, I created a vertex grid with x and z range [-1|1]. In the shader I multiply the xz screen coordinate of a vertex with the inverse of the View-Projection matrix. Then I want to adjust the height, depending on the new world xz coordinates and finally I transform these coordinates back to screenspace by multiplying them with the View-Projection matrix. I dont know why, but I get a very strange plane shown on the screen. Are the mathematical oprations I use correct? Best, erik

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