using effect shader on RHW vertices

Anddos · 2012-02-14T17:25:06

I cant seem to render the triangle that rendering as RHW ,pretransformed vertices, here is the render code LPDIRECT3DVERTEXBUFFER9 v_buffer = NULL; struct CUSTOMVERTEXRHW {FLOAT X, Y, Z, RHW; DWORD COLOR;}; #define CUSTOMFVFRHW (D3DFVF_XYZRHW | D3DFVF_DIFFUSE) CUSTOMVERTEXRHW vertices[] = { { 400.0f, 62.5f, 0.5f, 1.0f, D3DCOLOR_XRGB(0, 0, 255), }, { 650.0f, 500.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(0, 255, 0), }, { 150.0f, 500.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(255, 0, 0), }, }; // create a vertex buffer interface called v_buffer d3ddev->CreateVertexBuffer(3*sizeof(CUSTOMVERTEXRHW), 0, CUSTOMFVFRHW, D3DPOOL_MANAGED, &v_buffer, NULL); VOID* pVoid; // a void pointer // lock v_buffer and load the vertices into it v_buffer->Lock(0, 0, (void**)&pVoid, 0); memcpy(pVoid, vertices, sizeof(vertices)); v_buffer->Unlock(); D3DXCreateEffectFromFile(d3ddev, "simple.fx", 0, 0, 0, 0, &g_effect, &errorlog); g_effect->FindNextValidTechnique(NULL, &technique); in rendering D3DXMATRIX matWorld; D3DXMatrixIdentity(&matWorld); p_effect->SetMatrix("Projection", &matProjection); p_effect->SetMatrix("View", &matView); p_effect->SetMatrix("World", &(matWorld)); d3ddev->SetFVF(CUSTOMFVFRHW); d3ddev->SetStreamSource(0, v_buffer, 0, sizeof(CUSTOMVERTEXRHW)); d3ddev->DrawPrimitive(D3DPT_TRIANGLELIST, 0, 1); p_effect->EndPass(); // end the pass p_effect->End(); // end the effect //shader .fx float4x4 World; float4x4 View; float4x4 Projection; struct VertexOut { float4 Pos : POSITION; float4 Color : COLOR; }; VertexOut VShader(float4 Pos : POSITION) { VertexOut Vert = (VertexOut)0; float4x4 Transform; Transform = mul(World, View); Transform = mul(Transform, Projection); Vert.Pos = mul(Pos, Transform); Vert.Color = float4(1, 0, 0, 0); //returns red return Vert; } technique FirstTechnique { pass FirstPass { VertexShader = compile vs_2_0 VShader(); } } what am i doing wrong?

Graphics and GPU Programming Programming

Started by Anddos February 12, 2012 02:20 AM

9 comments, last by Evil Steve 12 years, 2 months ago

Anddos

588

Author

February 12, 2012 12:15 PM

its just rendering normal

21st Century Moose

13,459

February 12, 2012 01:22 PM

It's been a long time since I've used FVF codes, but I'm reasonably certain that using D3DFVF_XYZRHW will bypass the vertex shader entirely (D3DFVF_XYZRHW maps to D3DUSAGE_POSITIONT which specifies that vertex processing is skipped). In particular it makes no sense to be applying transforms to your position as the purpose of XYZRHW is to output untransformed vertex positions. So you should switch to D3DFVF_XYZ and seriously consider switching to vertex declarations too (there's a handy D3DXDeclaratorFromFVF which will help in the initial transition).

Direct3D has need of instancing, but we do not. We have plenty of glVertexAttrib calls.

Evil Steve

2,021

February 14, 2012 05:25 PM

What mhagain said. D3DFMV_XYZRHW means "Here is a vertex is screen space, don't run the vertex shader". And I'd strongly second getting away from FVF codes - Declarations are much easier to map with vertex shaders, and FVF codes don't even exist in DX10+.

using effect shader on RHW vertices

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