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DX7 SDK Sample question

Kentamanos · 1999-09-28T01:57:00

I am looking at a sample in the DX7 SDK. The sample is TrivFS (although the same exact questions are the same for the TrivWin windowed version). This sample is under their D3DX section, and gets installed in your start menu.The sample uses the vertex format D3DFVF_LVERTEX, which indicates the vertices are pre-lit (they do not have DX apply lighting to them), but are untransformed. In otherwords the vertices use a set color and the vertices are in model coordinates. The 3 vertices for the triangle have diffuse colors of red, green, and blue. So I have 2 questions:1) Why is the triangle black? Shouldn't the format of the vertex just make the color of these vertices red, green, and blue. I expected a blended triangle. 2) Do the World, View, and Projection matrices have default values? SetTransform is NEVER called in this example. Can someone please tell me what I am missing here? I am a newbie to D3D, and this one has me stumped. -------------------Kentamanos

Graphics and GPU Programming Programming

Started by Kentamanos September 28, 1999 01:57 AM

9 comments, last by Kentamanos 24 years, 9 months ago

Anonymous

September 28, 1999 01:57 AM

I was a littled puzzled about the differences between DX6.x and DX7 until I read this from Tim Sweeney:

"The API's simplicity has also improved, which is something you don't often see: usually code just gets more complex as it evolves. Porting Unreal Tournament's code from DirectX6 to DirectX7 only took 3.5 hours, and mostly consisted of deleting now-redundant code and changing function calls and interfaces. I'm very glad to see the IDirect3DTexture, IDirect3DViewport, and IDirect3DLight interfaces gone, and replaced by much simpler state-setting code. Direct3D's abuses of object-oriented programming are now gone."

What an insightful dude!