平铺纹理未正确平铺. [英] Tiled Texture is not tiling correctly.

问题描述

我正在尝试在地板上添加平铺的纹理.纹理不会显示，而是所有顶点都显示，并且球现在在其弹跳之后具有一个底面.任何帮助将不胜感激.

I am trying to add a tiled texture to the floor. The texture does not show up, instead all the vertices are showing, and the ball now has a floor that follows it''s bounce. Any help would be appreciated.

//within winmain

    pGrid->CreateDirectXMesh(pd3dDevice);
    D3DXCreateSphere(pd3dDevice, 2, 20, 20, &pBallMesh, NULL);

	// Main message loop:
	// Enter the message loop
    MSG msg; 
    ZeroMemory( &msg, sizeof(msg) );
    while( msg.message!=WM_QUIT )
    {
		// check for messages
		if( PeekMessage( &msg, NULL, 0U, 0U, PM_REMOVE ) )
        {
			TranslateMessage( &msg );
            DispatchMessage( &msg );
        }
		// this is called when no messages are pending
		else
		{
	        createCamera(0.1f, 1000.0f);		// near clip plane, far clip plane
	        moveCamera(camPos);
	        pointCamera(camLook);
            float speed, maxSpeed = 0.5;
            long volume;
            // update the ball velocity and position
            // fake some gravity here by increasing the ball''s negative y velocity
            BallVel.y -= .01f;
            // limit the ball''s speed to some maxSpeed value
            if (Abs(D3DXVec3Length(&BallVel)) > maxSpeed) {
                D3DXVec3Normalize(&BallVel, &BallVel);
                D3DXVec3Scale(&BallVel, &BallVel, maxSpeed);
            }   
            // update the ball''s position
            BallPos = BallPos + BallVel;
            // rebound if ball hits the grid
            pGrid->GetGridPoint(&gridPt, BallPos.x, BallPos.z);
            if (BallPos.y < gridPt.y) {
                // adjust the volume based on the speed of the collision
                speed = D3DXVec3Length(&BallVel);
                volume = long(0.25 * DSBVOLUME_MIN * (1 - (speed/maxSpeed)));
                // if speed is really slow set volume to min value
                if (speed < maxSpeed * 0.1f) {
                    volume = DSBVOLUME_MIN;
                }
                hr = DSBuffer->SetVolume(volume);
                if( FAILED( hr  ) )    
                    DXTRACE_ERR( TEXT("Volume error "), hr );
	            // play this sound
	            playSound(DSBuffer);
                // reflect the ball''s velocity in the y direction
                // make the rebound have some loss of energy
                BallVel.y *= -.8f;
                // adjust ball slightly above the grid
                BallPos.y = gridPt.y + .01f;
            }
            D3DXMatrixTranslation(&translate, BallPos.x, BallPos.y, BallPos.z);
	        D3DXMatrixIdentity(&id);

			// Clear the backbuffer to a black color
			pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(5, 5, 5), 1.0, 0 );

			// Clear the z buffer to a black color
			pd3dDevice->Clear( 0, NULL, D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(5, 5, 5), 1.0, 0 );

			// Call D3DXCreateTextureFromFile
			hr = D3DXCreateTextureFromFile( pd3dDevice, "patchy.jpg", &g_pTexture);

			// Check return code to make sure you have a valid texture
			if FAILED(hr)
				return false;

			pd3dDevice->BeginScene();
                 	pd3dDevice->SetTransform(D3DTS_WORLD, &id);
                        pGrid->DrawDirectXMesh(pd3dDevice);
                 	pd3dDevice->SetTransform(D3DTS_WORLD, &translate);
                        pBallMesh->DrawSubset(0);

			pd3dDevice->SetTexture(0, g_pTexture);
                        pGrid->DrawDirectXMesh(pd3dDevice);

			pd3dDevice->EndScene();
			// Present the backbuffer contents to the display
			pd3dDevice->Present( NULL, NULL, NULL, NULL );
		}
    }
	// release and shutdown Direct3D
	shutdownDirect3D();
	// Release the DirectSound buffer created above
	if (DSBuffer)
	{
		DSBuffer->Release();
		DSBuffer = NULL;
	}
	// shutdown DirectSound
	shutdownDirectSound();
	return (int) msg.wParam;
}

推荐答案

我看不到DrawDirectXMesh内部发生了什么，但是如果您只能看到顶点而不是我看到的实际面只能假定使用D3DPT_POINTLIST而不是D3DPT_TRIANGLELIST进行渲染.自己设置地板的顶点然后进行渲染可能会更容易.


至于跟随球的地板，是因为您没有在渲染球后重置世界矩阵.您似乎也在两次画地板:

I can''t see what''s happening inside of DrawDirectXMesh but If you can only see the vertex points instead of the actual faces that I can only assume it''s rendering with D3DPT_POINTLIST instead of D3DPT_TRIANGLELIST. It might be easier to set up the vertices for the floor yourself and then render them.


As for the floor following the ball, it''s because you didn''t reset the world matrix after rendering the ball. You also seem to be drawing the floor twice:

pd3dDevice->SetTransform(D3DTS_WORLD, &id);
pGrid->DrawDirectXMesh(pd3dDevice); //<-Drawing the grid in the right place
pd3dDevice->SetTransform(D3DTS_WORLD, &translate);
pBallMesh->DrawSubset(0);

pd3dDevice->SetTexture(0, g_pTexture);
pGrid->DrawDirectXMesh(pd3dDevice); //<- Drawing the grid again with the same translation as the ball

pGrid到底是什么?
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What exactly is pGrid?
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