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Textured Quads

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DeadlyDan    123
Hi guys, i've followed the article on the site for rendering textured quads, but i don't seem to get any results, i've tried lots of varations but the texture just never shows up. In my "DrawQuad" function i have the following code: This is in D3D8 by the way...
	RECT dest;
	DWORD fvf;
	TLVERTEX* m_pVertex = NULL;
	texture->GetLevelDesc ( 0, &desc );

	dest.left = x; = y;
	dest.right = dest.left + desc.Width;
	dest.bottom = + desc.Height;

	Backbones.GetDevice ( )->GetVertexShader ( &fvf );
	Backbones.GetDevice ( )->SetStreamSource ( 0, m_pVertexBuffer, sizeof ( 		TLVERTEX ) );
	Backbones.GetDevice ( )->SetVertexShader ( D3DFVF_TEXTUREDQUAD );

    	m_pVertexBuffer->Lock ( 0, 4 * sizeof(TLVERTEX), (BYTE**)&m_pVertex, 0 );
	m_pVertex[0].colour = colour;
	m_pVertex[0].x = (float)dest.left - 0.5f;
	m_pVertex[0].y = (float) - 0.5f;
	m_pVertex[0].z = 1.0f;
	m_pVertex[0].rhw = 1.0f;
	m_pVertex[0].u = 0.0f;
	m_pVertex[0].v = 0.0f;

	m_pVertex[1].colour = colour;
	m_pVertex[1].x = (float)dest.right - 0.5f;
	m_pVertex[1].y = (float) - 0.5f;
	m_pVertex[1].z = 1.0f;
	m_pVertex[1].rhw = 1.0f;
	m_pVertex[1].u = 1.0f;
	m_pVertex[1].v = 0.0f;

	m_pVertex[2].colour = colour;
	m_pVertex[2].x = (float)dest.right - 0.5f;
	m_pVertex[2].y = (float)dest.bottom - 0.5f;
	m_pVertex[2].z = 1.0f;
	m_pVertex[2].rhw = 1.0f;
	m_pVertex[2].u = 1.0f;
	m_pVertex[2].v = 1.0f;

	m_pVertex[3].colour = colour;
	m_pVertex[3].x = (float)dest.left - 0.5f;
	m_pVertex[3].y = (float)dest.bottom - 0.5f;
	m_pVertex[3].z = 1.0f;
	m_pVertex[3].rhw = 1.0f;
	m_pVertex[3].u = 0.0f;
	m_pVertex[3].v = 1.0f;

	m_pVertexBuffer->Unlock ( );
	Backbones.GetDevice ( )->SetTexture ( 0, texture );
	Backbones.GetDevice ( )->DrawPrimitive ( D3DPT_TRIANGLEFAN, 0, 2 );

	Backbones.GetDevice ( )->SetVertexShader ( fvf );

	Backbones.GetDevice ( )->SetStreamSource ( 0, NULL, 0 );
In my "Initialize" function i have:
	Backbones.GetDevice ( )->CreateVertexBuffer ( sizeof ( TLVERTEX ) * 4, NULL, D3DFVF_TEXTUREDQUAD, D3DPOOL_MANAGED, &m_pVertexBuffer );
and in "Invalidate" i have:
	SAFE_RELEASE ( m_pVertexBuffer );
If anyone could help me out it would be greatly appreciated, i basically just want to be able to render textured quads without using the sprite class :) Thanks.

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sirob    1181

but i don't seem to get any results

What does that mean? Nothing renders? no texture? computer blows up?

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Evil Steve    2017
  • Your RHW value shouldn't be 1.0f or 0.0f. Try using 0.5f instead.
  • Have you tried it without a texture to see if that makes a difference?
  • Have you tried / are you clearing your backbuffer to a non-black colour in case your quad is being drawn, but black for some reason (Although it's unlikely with transformed verts)

    And, slightly off topic:
  • It's generally preferable to use an orthogonal projection matrix and to specify your quads in world space now. That lets D3D handle vertex transforms and gives you things like rotation for "free".
  • Any particular reason you're using DX8 instead of DX9? DX9 is pretty much the standard now.

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