//Funcion para renderizar la esfera
void render_esfera(float m_Radius, int sl, int st , int id_textura) {
struct vertice m_Vertex[sl*st*2];
float x0, y0, z0;
float x1, y1, z1;
float sinxy;
int i, j, v= 0;
unsigned int numVertex = 2*sl*st;
float xzAngle = 2.0f*3.1415/(float)sl;
float xyAngle = 2.0f*3.1415/(float)st;
glEnable(GL_TEXTURE_2D);
// Con esta función indicamos que vamos a utilizar la textura
glBindTexture(GL_TEXTURE_2D, textura[id_textura]);
glColor3d(1,1,1); //El color que le asignamos en 3D
if ( numVertex <= MAX_TAM_ESFERA ) {
for (i=0; i < sl; i++){// Meridianos
for (j=0; j < st; j++){// Paralelos
sinxy= sin(j*xyAngle); // Para no calcularlo 4 veces
x0= sinxy * cos(i*xzAngle);
y0= cos(j*xyAngle);
z0= sinxy * sin(i*xzAngle);
// Vertice
m_Vertex[v].x = m_Radius*x0;
m_Vertex[v].y = m_Radius*y0;
m_Vertex[v].z = m_Radius*z0;
// Normal
m_Vertex[v].nx= x0;
m_Vertex[v].ny= y0;
m_Vertex[v].nz= z0;
//m_Vertex[v].su= 1.0f-i/(float)slices; // SU= 1-i*xzAngle/2PI
m_Vertex[v].su= i/(float)sl; // SU= i*xzAngle/2PI
m_Vertex[v].tv= ((float)st-2.0f*j)/(float)st; // TV= 1-j*xyAngle/PI
v++;
x1= sinxy * cos((i+1)*xzAngle);
y1= y0;
z1= sinxy * sin((i+1)*xzAngle);
m_Vertex[v].x = m_Radius*x1;
m_Vertex[v].y = m_Radius*y1;
m_Vertex[v].z = m_Radius*z1;
m_Vertex[v].nx= x1;
m_Vertex[v].ny= y1;
m_Vertex[v].nz= z1;
// m_Vertex[v].su= 1.0f-(i+1)/(float)slices;
m_Vertex[v].su= (i+1)/(float)sl;
m_Vertex[v].tv= m_Vertex[v-1].tv; // Igual que el anterior.
v++;
}
}
RenderVertices( 4, (char *)m_Vertex, sizeof(vertice), 0, numVertex);//, eFVF_XYZ|eFVF_NORMAL|eFVF_TEX1 );
}
glDisable(GL_TEXTURE_2D);
}
/**
@brief
@date 2014-04-17
*/
void cParticle::Render(HDC hdc)
{
RenderVertices(hdc, m_vertices, m_localTm*m_tm);
}
