DirectX9 : Çember Çizdirmek

Evet arkadaşlar çizdirdiğimiz çember aşagıdaki gibidir.,cizgi halindedir çemberin boyutlarını kendimiz belirliyoruz.

////////////////FONKSİYON//////////////////////

Kod:
#define D3DFVF_TL (D3DFVF_XYZRHW | D3DFVF_DIFFUSE | D3DFVF_TEX1)
struct D3DTLVERTEX
{
float fX;
float fY;
float fZ;
float fRHW;
D3DCOLOR Color;
float fU;
float fV;
};

//-----------------------------------------------------------------------------------
//CreateD3DTLVERTEX--Populate a D3DTLVERTEX structure
//-----------------------------------------------------------------------------------
D3DTLVERTEX CreateD3DTLVERTEX(float X, float Y, float Z, float RHW,
D3DCOLOR color, float U, float V)
{
D3DTLVERTEX v;

v.fX = X;
v.fY = Y;
v.fZ = Z;
v.fRHW = RHW;
v.Color = color;
v.fU = U;
v.fV = V;

return v;
}//

//-----------------------------------------------------------------------------------

void Draw2DCircle(int x, int y, float radius, D3DCOLOR color, LPDIRECT3DDEVICE9 dev)

{

const int NUMPOINTS = 24;

const float PI = 3.14159;



D3DTLVERTEX Circle[NUMPOINTS + 1];

int i;

float X;

float Y;

float Theta;

float WedgeAngle; //Size of angle between two points on the circle (single wedge)



//Precompute WedgeAngle

WedgeAngle = (float)((2 * PI) / NUMPOINTS);



//Set up vertices for a circle

//Used <= in the for statement to ensure last point meets first point (closed circle)

for (i = 0; i <= NUMPOINTS; i++)

{

//Calculate theta for this vertex

Theta = i * WedgeAngle;



//Compute X and Y locations

X = (float)(x + radius * cos(Theta));

Y = (float)(y - radius * sin(Theta));



Circle = CreateD3DTLVERTEX(X, Y, 0.0f, 1.0f, color, 0.0f, 0.0f);

}

//Now draw the circle

dev->SetFVF(D3DFVF_TL);

dev->SetTexture(0, NULL);

dev->DrawPrimitiveUP(D3DPT_LINESTRIP, NUMPOINTS, &Circle[0], sizeof(Circle[0]));

}//Draw2DCircle
//////////////////ÇİZDİRMEK İÇİN////////////////
Kod:
Draw2DCircle(150, 360, 71, D3DCOLOR_ARGB(255, 255, 0, 255), pDevice);///x konumu,Y konumu,Çemberin yarıçapı,renk, pDevice