tex2D vs. tex2Dproj

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texCoord(  texX, texY, texZ , texW ) means texture coordinate after transforming from the texture matrix [ position goes through world, view, projection, and texture ].


We can use this texCoord to fetch pixels from a texture, sampler:
1.  float4 color = tex2D( sampler,  float2( texX / texW, texY/texW );
2.  float4 color = tex2Dporj( sampler, float4( texX, texY, texZ, texW ) );

The above two methods will have the same result because tex2Dproj operator supports divide w in its interface.


http://www.gamedev.net/community/forums/topic.asp?topic_id=408894
http://bbs.gameres.com/showthread.asp?threadid=104316

Comments

  1. AnonymousApril 27, 2022 at 3:44 AM

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  2. AnonymousJune 21, 2026 at 10:48 AM

    Texture mapping and shader operations are fundamental techniques used in image enhancement, graphics rendering, and visual computing systems. Students and developers interested in visual processing and graphics algorithms can explore Image Processing Projects For Final Year to gain hands-on experience with image filtering, transformations, and advanced visual processing techniques.

    ReplyDelete
  3. AnonymousJune 21, 2026 at 10:48 AM

    The concepts of texture projection, coordinate transformation, and shader-based rendering discussed here form the foundation for many modern AI-powered visual applications. These techniques are increasingly combined with neural networks for image enhancement, scene understanding, and intelligent graphics generation. Students interested in AI-driven visual computing can explore Deep Learning Projects For Final Year to learn how deep neural models are transforming image analysis, graphics, and computer vision applications.

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