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diffuse, texture and light

Started by Locutus2 Jun 17, 2002 at 7:21 AM 1 reply 750+ views

Original Post

Jun 17, 2002 at 7:21 AM

Hi ! Just wondering how to setup the renderstates so my polygons take color from : 1: the diffuse color 2: if there is an texture present, the texture 3: if the polygon is hit by light, the light color [edit]the problem is when a polygon is outside the range or not hit by a light, the color is taken from the ambient color. I want the color to be a mix of the ambient and diffuse color.[/edit] this is my current renderstates: SetRenderState(D3DRS_ALPHATESTENABLE, TRUE); SetRenderState(D3DRS_ALPHAFUNC, D3DCMP_GREATEREQUAL); SetRenderState(D3DRS_ALPHAREF, 1); SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA); SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA); SetRenderState(D3DRS_BLENDOP, D3DBLENDOP_ADD) ; SetTextureStageState(0,D3DTSS_COLOROP,D3DTOP_MODULATE); SetTextureStageState(0,D3DTSS_COLORARG1,D3DTA_TEXTURE); SetTextureStageState(0,D3DTSS_COLORARG2,D3DTA_CURRENT); SetTextureStageState(0,D3DTSS_ALPHAOP,D3DTOP_MODULATE); SetTextureStageState(0,D3DTSS_ALPHAARG1,D3DTA_TEXTURE); SetTextureStageState(0,D3DTSS_ALPHAARG2,D3DTA_DIFFUSE); SetTextureStageState(0,D3DTSS_MAGFILTER, D3DTEXF_LINEAR); SetTextureStageState(0,D3DTSS_MINFILTER, D3DTEXF_LINEAR); SetTextureStageState(0,D3DTSS_ADDRESSU, D3DTADDRESS_MIRROR); SetTextureStageState(0,D3DTSS_ADDRESSV, D3DTADDRESS_MIRROR); SetRenderState(D3DRS_LIGHTING, true); SetRenderState(D3DRS_AMBIENT,D3DCOLOR_XRGB(128,128,128)); Thanks! [edited by - Locutus2 on June 19, 2002 4:18:09 PM]

Dean Harding

Jun 19, 2002 at 4:22 AM

Before I answer your question, did you know that this message has topic_id=100000? That''s pretty special, I think

Anyway, if I understand your problem, you''re saying that when outside the range of a D3DLIGHT, you''re only getting the diffuse component? Well, that''s by design. I mean if you''re not being lit by any lights, then you should only have ambient lighting...

The only way around this would be to detect whether the object is out of range of any lights in your own code and change the render states/textures states accordingly.

codeka.com - Just click it.

Cipher2

Jun 19, 2002 at 5:06 AM

I''m part of locutus project if you''re wondering =)
The thing is that when objects are only hit by ambient light the color is taken entirely from the ambient light not mixing with the diffuse color of the sprite.

If we have grey as ambient all things outside lights are grey.

Hope this clarifies.

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