Meu método DrawBox e DrawCircle.

Olá povo,eu irei postar meu metodo de desenhar uma caixa(DrawBox), e o circulo(DrawCircle).

Code:

#define D3DFVF_TEXTUREVERTEX (D3DFVF_XYZRHW|D3DFVF_DIFFUSE|D3DFVF_TEX1)

Code:

struct TEXTUREVERTEX
{
	D3DXVECTOR3 vec;
	FLOAT rhw;
	DWORD color;
	FLOAT u, v;
};

Code:

void CriarVertex( TEXTUREVERTEX* pVertices, FLOAT x, FLOAT y, FLOAT u, FLOAT v, DWORD dwCor )
{
	pVertices->vec = D3DXVECTOR3( x - 0.5f, y - 0.5f, 0 );
	pVertices->rhw   = 1.0f;
	pVertices->u     = u;
	pVertices->v     = v;
	pVertices->color = dwCor;
}

Caixa:

Code:

void DesenharCaixa1(int x,int y,int w,int h, DWORD ColorStart,int UsarVertex1,LPDIRECT3DDEVICE9 m_pd3dDevice)
{
	RECT rect = { x, y, x + w, y + h };;

	FLOAT Esquerda   = (FLOAT)rect.left;
	FLOAT Cima    = (FLOAT)rect.top;
	FLOAT Direita  = (FLOAT)rect.right;
	FLOAT Baixo = (FLOAT)rect.bottom;

	TEXTUREVERTEX vertex[ 4 ];
	TEXTUREVERTEX* pVertices = vertex; 

	CriarVertex( pVertices, Esquerda, Cima, rect.left, rect.left, ColorStart );
	pVertices++;
	CriarVertex( pVertices, Direita, Cima, rect.right, rect.right, ColorStart );
	pVertices++;
	CriarVertex( pVertices, Esquerda, Baixo, rect.bottom, rect.bottom, ColorStart );
	pVertices++;
	CriarVertex( pVertices, Direita, Baixo, rect.top+rect.right,rect.top+rect.right, ColorStart );
	pVertices++;

	m_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSU, 1 );
	m_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSV, 1 );
	m_pd3dDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_ANISOTROPIC );//qualidade
	m_pd3dDevice->SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_ANISOTROPIC );//qualidade	

	m_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );	
	m_pd3dDevice->SetRenderState( D3DRS_ALPHABLENDENABLE,   TRUE );

	m_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP,   D3DTOP_SELECTARG1 );
	m_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
	m_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAOP,   D3DTOP_MODULATE );
	m_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE );
	m_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG2, D3DTA_TFACTOR  );

    m_pd3dDevice->SetTextureStageState(1, D3DTSS_COLOROP, D3DTOP_SELECTARG1);
    m_pd3dDevice->SetTextureStageState(1, D3DTSS_COLORARG1, D3DTA_CURRENT);
    m_pd3dDevice->SetTextureStageState(1, D3DTSS_ALPHAOP, D3DTOP_MODULATE);
    m_pd3dDevice->SetTextureStageState(1, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);
    m_pd3dDevice->SetTextureStageState(1, D3DTSS_ALPHAARG2, D3DTA_CURRENT);


    m_pd3dDevice->SetVertexShader( NULL );
	m_pd3dDevice->SetTexture( 0, NULL );
	m_pd3dDevice->SetTexture( 1, NULL );
	m_pd3dDevice->SetFVF( D3DFVF_TEXTUREVERTEX );
	m_pd3dDevice->DrawPrimitiveUP( D3DPT_TRIANGLESTRIP, 2, vertex, sizeof( TEXTUREVERTEX ) );
	m_pd3dDevice->SetTexture( 0, NULL );
	m_pd3dDevice->SetTexture( 1, NULL );
}

Circulo:

Code:

BOOL DesenharCirculo(int x,int y,DWORD dwCor, float bTamanho, BOOL bNoCentro,LPDIRECT3DDEVICE9 m_pd3dDevice)
{
	POINT pt = {x,y};
	if( bTamanho == 0.0f )
		bTamanho = float(min(pt.x,pt.y)/2);
	bTamanho *= 1.0f;

	if( !bNoCentro )
	{
		pt.x += long(bTamanho);
		pt.y += long(bTamanho);
	}
	TEXTUREVERTEX pVertex[366];
	float x1 = float(pt.x);
	float y1 = float(pt.y);
	float u1 = 0.5f;
	float v1 = 0.5f;

	for( int i=0;i<=363; )
	{
		float angle = ( i / 57.3f );
		float x2 = pt.x + ( bTamanho * sin( angle ) );
		float y2 = pt.y + ( bTamanho * cos( angle ) );
		float u2 = 0.5f + ( 0.5f * sin( angle ) );
		float v2 = 0.5f + ( 0.5f * cos( angle ) );

		CriarVertex( &pVertex[i++], float(pt.x), float(pt.y), 0.5f, 0.5f,dwCor );
		CriarVertex( &pVertex[i++], x1, y1, u1, v1 ,dwCor);
		CriarVertex( &pVertex[i++], x2, y2, u2, v2 ,dwCor);
		y1 = y2;
		x1 = x2;
		u1 = u2;
		v1 = v2;
	}
	m_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSU, 1 );
	m_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSV, 1 );

 	m_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSU, D3DTADDRESS_WRAP );
	m_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSV, D3DTADDRESS_WRAP );

	m_pd3dDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_ANISOTROPIC );//qualidade
	m_pd3dDevice->SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_ANISOTROPIC );//qualidade

	m_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );	
	m_pd3dDevice->SetRenderState( D3DRS_ALPHABLENDENABLE,   TRUE );

	m_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP,   D3DTOP_SELECTARG1 );
	m_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
	m_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAOP,   D3DTOP_MODULATE );
	m_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE );
	m_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG2, D3DTA_TFACTOR  );
	m_pd3dDevice->SetVertexShader( NULL );

	//m_pd3dDevice->SetTextureStageState( 0, D3DTSS_TEXCOORDINDEX, D3DTSS_TCI_PASSTHRU  );//Rendertarget mascara alpha
    //IDirect3DSurface9 *pRenderTarget = NULL;
    //m_pd3dDevice->GetBackBuffer(0,1,D3DBACKBUFFER_TYPE_MONO,&pRenderTarget);
    //m_pd3dDevice->CreateDepthStencilSurface(800,600,D3DFMT_A8R8G8B8,D3DMULTISAMPLE_NONMASKABLE,NULL,true,&pRenderTarget,NULL);//
    //pRenderTarget->Release();
	//m_pd3dDevice->SetRenderTarget(0,pRenderTarget);//
	//////////////
    m_pd3dDevice->SetTexture( 0, NULL );
	m_pd3dDevice->SetTexture( 1, NULL );
	m_pd3dDevice->SetFVF( D3DFVF_TEXTUREVERTEX );
	m_pd3dDevice->DrawPrimitiveUP( D3DPT_TRIANGLESTRIP, 363, pVertex, sizeof( TEXTUREVERTEX ) );
	m_pd3dDevice->SetTexture( 0, NULL );
	m_pd3dDevice->SetTexture( 1, NULL );

	return TRUE;

}

Obs : O circulo é completo,não é apenas a borda, ótimo para usar em radar, ou não! E isso pode ser útil para alguns.

Créditos : Ademir,DirectX(usei como inicio), Jeff (peguei um a parte do tamanho do circulo e o struct que não sei se é dele).