SDL, OGL a glRotatef – C / C++ – Fórum – Programujte.com

Ahoj, mam problem s glRotatef funkciou, vid prilozeny obrazok. Kod:

struct rect{

  int x;

  int y;

  int width;

  int height;

  int angle;

  color4f color;

  int speedX;

  int speedY;

};



void se_drawRect(rect rect){

  glTranslatef(rect.x, rect.y, 0);

  glRotatef(rect.angle, rect.width/2, rect.height/2, 0);

  glColor4f(rect.color.r, rect.color.g, rect.color.b, rect.color.a);

  glBegin(GL_QUADS);

    glVertex3f(0,0,0);

    glVertex3f(rect.width,0,0);

    glVertex3f(rect.width,rect.height,0);

    glVertex3f(0,rect.height,0);

  glEnd();

  glLoadIdentity();

}



int main(){

...

rect rect1= {50,50,200,100,10, se_mapRGBA(1,1,1,1)};

...

while(true){

...

se_drawRect(rect1);

...

glRotatef(rect.angle, rect.width/2, rect.height/2, 0); to rotuješ dvěma směry změň na
glRotatef(rect.angle, 1, 0, 0); - to je rotace o úhel v Ose X pro 2D

Aha uz chapem, ja som myslel ze tam treba dat suradnice bodu okolo ktoreho sa budeme tocit :)