DX not rendering 2d scene

cryo75 · 2003-09-24T09:48:05

Hi all, I''ve got the following class: #ifndef CPANE_H #define CPANE_H #include "StdAfx.h" class CPane { //Private member variables private: //Generic int miWidth; //Viewport / window width int miHeight; //Viewport / window height int miTextures; //Counter of loaded textures int miMaxTextures; //Maximum number of textures //Pane element struct ELEMENT { LPDIRECT3DTEXTURE9 mptex; int x, y; float xSize, ySize; }; ELEMENT* pElements; //Custom vertex struct PANEVERTEX { D3DXVECTOR3 position; D3DXVECTOR3 vecNorm; FLOAT tu, tv; FLOAT tu2, tv2; }; // static const DWORD D3DFVF_PANEVERTEX = (D3DFVF_XYZ | D3DFVF_NORMAL | D3DFVF_TEX2); DWORD D3DFVF_PANEVERTEX; //DirectX LPDIRECT3DDEVICE9 mpdev; LPDIRECT3DVERTEXBUFFER9 mpvb; //Private member functions private: HRESULT InitPane(); //Implementation public: HRESULT Create(LPDIRECT3DDEVICE9 pDev, int iWidth, int iHeight); HRESULT LoadTexture(int x, int y, float xs, float ys, LPCSTR szFileName); HRESULT Render(); void CleanUp(); //Defaults public: CPane(); ~CPane(); }; #endif #include "CPane.h" CPane::CPane() { //Objects mpvb = NULL; mpdev = NULL; //Textures miMaxTextures = 32; miTextures = 0; pElements = new ELEMENT[miMaxTextures]; D3DFVF_PANEVERTEX = (D3DFVF_XYZ | D3DFVF_NORMAL | D3DFVF_TEX2); } CPane::~CPane() { CleanUp(); } void CPane::CleanUp() { //Objects SAFE_RELEASE(mpvb); //Textures SAFE_DELETE(pElements); //Reset textures count miTextures = 0; } HRESULT CPane::Create(LPDIRECT3DDEVICE9 pDev, int iWidth, int iHeight) { CleanUp(); //Get our rendering device mpdev = pDev; if (!mpdev) return E_FAIL; //Save the window dimensions miWidth = iWidth; miHeight = iHeight; //3D projection matrix D3DXMATRIX matProj; D3DXMatrixOrthoLH(&matProj, (float)miWidth, (float)miHeight, 0, 1); mpdev->SetTransform(D3DTS_PROJECTION, &matProj); //Turn off culling mpdev->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE); //Turn off lighting mpdev->SetRenderState(D3DRS_LIGHTING, FALSE); //Turn off z-buffering (no 2d graphics discarded at render time) mpdev->SetRenderState(D3DRS_ZENABLE, FALSE); //Turn off z-buffer writing (2d graphics not to alter z-buffer) mpdev->SetRenderState(D3DRS_ZWRITEENABLE, FALSE); //Initialize the vertex buffer return InitPane(); } HRESULT CPane::InitPane() { PANEVERTEX* pVertices; //Create the interface object buffer if(FAILED(mpdev->CreateVertexBuffer(4*sizeof(PANEVERTEX), 0, D3DFVF_PANEVERTEX, D3DPOOL_DEFAULT, &mpvb, NULL))) return E_FAIL; //Lock the buffer for editing if(FAILED(mpvb->Lock(0, 0, (void**)&pVertices, 0))) return E_FAIL; //Create a quad made up of 3 vertices (triangle strips) // // 1 3 // X--------X // |x | // | x | // | x | // | x | // | x | // | x | // | x | // | x| // X--------X // 0 2 // pVertices[0].position = D3DXVECTOR3( 0.0f, 0.0f, 0.0f ); pVertices[0].tu = 0.0f; pVertices[0].tv = 1.0f; pVertices[0].tu2 = 0.0f; pVertices[0].tv2 = 1.0f; pVertices[0].vecNorm = D3DXVECTOR3(0.0f,0.0f,1.0f); pVertices[1].position = D3DXVECTOR3( 0.0f, 1.0f, 0.0f ); pVertices[1].tu = 0.0f; pVertices[1].tv = 0.0f; pVertices[1].tu2 = 0.0f; pVertices[1].tv2 = 0.0f; pVertices[1].vecNorm = D3DXVECTOR3(0.0f,0.0f,1.0f); pVertices[2].position = D3DXVECTOR3( 1.0f, 0.0f, 0.0f ); pVertices[2].tu = 1.0f; pVertices[2].tv = 1.0f; pVertices[2].tu2 = 1.0f; pVertices[2].tv2 = 1.0f; pVertices[2].vecNorm = D3DXVECTOR3(0.0f,0.0f,1.0f); pVertices[3].position = D3DXVECTOR3( 1.0f, 1.0f, 0.0f ); pVertices[3].tu = 1.0f; pVertices[3].tv = 0.0f; pVertices[3].tu2 = 1.0f; pVertices[3].tv2 = 0.0f; pVertices[3].vecNorm = D3DXVECTOR3(0.0f,0.0f,1.0f); //Done editing, unlock the buffer mpvb->Unlock(); return D3D_OK; } HRESULT CPane::LoadTexture(int x, int y, float xs, float ys, LPCSTR szFileName) { //LPDIRECT3DTEXTURE9 mptex; //Do we have a device? if (!mpdev) return E_FAIL; //Have we reached the maximum textures? if (miTextures == miMaxTextures) return E_FAIL; //Load the texture from file if (FAILED(D3DXCreateTextureFromFile(mpdev, szFileName, &pElements[miTextures].mptex))) { if (miTextures > 0) miTextures--; return E_FAIL; } //Set the appropriate values in the structure //pElements[miTextures].mptex = mptex; pElements[miTextures].x = x; pElements[miTextures].y = y; pElements[miTextures].xSize = xs; pElements[miTextures].ySize = ys; //Increment the number of textures we''re using miTextures++; return D3D_OK; } HRESULT CPane::Render() { D3DXMATRIX matWorld, matRotation, matTranslation, matScale; float fXPos, fYPos; //Do we have a device? if (!mpdev) return E_FAIL; for (int i = 0; i < miTextures; i++) { //Set default position, scale, rotation D3DXMatrixIdentity(&matTranslation); //Scale the sprite D3DXMatrixScaling(&matScale, pElements[i].xSize, pElements[i].ySize, 1.0f); D3DXMatrixMultiply(&matTranslation, &matTranslation, &matScale); //Rotate the sprite D3DXMatrixRotationZ(&matRotation, 0.0f); D3DXMatrixMultiply(&matWorld, &matTranslation, &matRotation); //Calculate the position in screen-space fXPos = (float)(-(miWidth / 2) + pElements[i].x); fYPos = (float)(-(miHeight / 2) - pElements[i].y + pElements[i].ySize); //Move the sprite matWorld._41 = fXPos; matWorld._42 = fYPos; //Set matrix mpdev->SetTransform(D3DTS_WORLD, &matWorld); mpdev->SetTexture(0, pElements[i].mptex); mpdev->SetStreamSource(0, mpvb, 0, sizeof(PANEVERTEX)); mpdev->SetFVF(D3DFVF_PANEVERTEX); mpdev->DrawPrimitive(D3DPT_TRIANGLESTRIP, 0, 2); //Dereference texture mpdev->SetTexture(0, NULL); } return D3D_OK; } my main render function is the following: HRESULT CEngine::Render() { if (!mpdev) return E_FAIL; mpdev->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_ARGB(0,0,0,0), 1.0f, 0); if (SUCCEEDED(mpdev->BeginScene())) { //mptile->Render(); if (mppane) mppane->Render(); UpdateStats(); mpdev->EndScene(); } mpdev->Present(NULL, NULL, NULL, NULL); return D3D_OK; } I am loading a 256x256 tga and placing and 0,0. The damn bitmap is not being rendered on the screen and it''s driving me crazy... HELP!!!! Any suggestions?? Ivan

Graphics and GPU Programming Programming

Started by cryo75 September 24, 2003 05:09 AM

12 comments, last by cryo75 20 years, 7 months ago

UdayK

122

September 24, 2003 06:23 AM

It''s working because you''re far plane isn''t clipping it anymore.

Well specifying near clipping plane as 0 is not a very good idea, you could try 0.1f.

winman_ex

cryo75

143

Author

September 24, 2003 08:54 AM

Ilankt, how are you calculating the x,y,y pos of the translation??

Ivan

Ilankt

229

September 24, 2003 09:07 AM

DELETED:
oops, nope...

[edited by - ilankt on September 24, 2003 10:33:12 AM]

How appropriate, you fight like a cow!

cryo75

143

Author

September 24, 2003 09:48 AM

I''m using the following formulas:

fXPos = (float)(-(miWidth / 2) + pElements[i].x);fYPos = (float)(-(miHeight / 2) - pElements[i].y + pElements[i].ySize - 31);

when it''s a 256x256 bitmap it''s ok but when it''s another size (eg. 128x128), the y pos freaks out and comes somewhere in the middle of the window.

furthermore, if a switch to wireframe i can the the quad, whilst if i''m in normal mode (where I ant to display the texture), I get nothing... stange

Ivan

DX not rendering 2d scene

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