PSP GU shapes

void drawCircle(int x, int y, float radius, unsigned long color, bool filled){
    sceKernelDcacheWritebackInvalidateAll();

    LINE_VERTEX *vertices = (LINE_VERTEX*)sceGuGetMemory(180 * sizeof(LINE_VERTEX));
    int j;
    for(int i = 0; i < 180; i++){
        j = i * 2;
        vertices[i].x = (int)(x + vfpu_cosf(j) * radius);
        vertices[i].y = (int)(y + vfpu_sinf(j) * radius);
        vertices[i].z = 0;
        vertices[i].color = color;
    }

    if(filled){
        sceGuDrawArray(GU_TRIANGLE_FAN, GU_COLOR_8888|GU_VERTEX_16BIT|GU_TRANSFORM_2D, 180, 0, vertices);
    }else{
        sceGuDrawArray(GU_LINES, GU_COLOR_8888|GU_VERTEX_16BIT|GU_TRANSFORM_2D, 180, 0, vertices);
    }
    sceKernelDcacheWritebackRange(vertices, 180 * sizeof(LINE_VERTEX)); //SAKYA
}

void drawNgone(int x, int y, float radius, int faces, unsigned long  color, bool filled){
    float step = PI_2/faces;
    float angle = 0;
    LINE_VERTEX *vertices;

    vertices = (LINE_VERTEX*)sceGuGetMemory(faces * sizeof(LINE_VERTEX));

    for(int i = 0; i < faces; i ++){
        vertices[i].x = (int)(x + vfpu_cosf(angle) * radius);
        vertices[i].y = (int)(y + vfpu_sinf(angle) * radius);
        vertices[i].z = 0;
        vertices[i].color = color;
        angle += step;
    }
    if(filled)
        sceGuDrawArray(GU_TRIANGLE_FAN, GU_COLOR_8888|GU_VERTEX_16BIT|GU_TRANSFORM_2D, faces, 0, vertices);
    else
        sceGuDrawArray(GU_LINES, GU_COLOR_8888|GU_VERTEX_16BIT|GU_TRANSFORM_2D, faces, 0, vertices);
    sceKernelDcacheWritebackRange(vertices, faces * sizeof(LINE_VERTEX)); //SAKYA
}