OpenGl and C++ music - How to play 2 music at the same time?

[MH4]

Hi guys I'm wondering if you guys know anything about how to play 2 sounds the same time? Currrently I'm using irrKlang and i dont think that i can play 2 sounds at the same time. Or maybe it could be my code that has a problem? Btw I'm using openGl and im currently trying to do a theme park/carnival. Im now currently doing my drop tower ride.

// this is in main.cpp
// i declared dt1 in main.cpp
// dt1 is a dropTower object
void doMainLoop()
{
	dt1.update_move();
}

void main (int argc, char * argv[])
{
	glutInit (&argc, argv);
	glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
	glutInitWindowSize (800, 600);
	glutInitWindowPosition (100, 100);
	glutCreateWindow ("Pir4tes!");
	glutDisplayFunc (MyDisplay);
	glutReshapeFunc (rescale); // to be called when window size has changed
	glutMouseFunc (onMouseClick);
	glutMotionFunc (onMouseMove);
	glutKeyboardFunc (keyboard);
	glutIdleFunc(doMainLoop);
	bgm(); // my background music


	init ();
	glutMainLoop ();
}

//this is in dropTower.h
#pragma once

#include <iostream>
#include "vec3D.h"
#include "gl/freeglut.h"

class dropTower {
private:
	vec3D pos; // position
	float elevator_move; // elevator motion
	bool elevator_flag;
public:
	dropTower();
	vec3D get_pos (void); // get current position
	void draw_base (void);
	void draw_support (void);
	void draw_elevator (void);
	void draw_seat (void);

	void update_move (void); // to update positions
	void draw_tower (void); // draw tower
};

// this is in dropTower.cpp
void dropTower::update_move (void) {
	// elevator_flag is used to track whether the elevator is going up or down
	// false = elevator is going down / elevator has reached max height
	// true = elevator is going up / elevator has reached min height
	if (elevator_flag == false) {
		elevator_move-=2;

		if (elevator_move <= 0.0) {
			elevator_flag = true;
		}
	}

	else {
		elevator_move+=0.5;

		if (elevator_move >= 300.0) {
			elevator_flag = false;
			ride_scream();
		}
	}
};

void dropTower::draw_tower(void) {
        vec3D vecDt(300,300,300); // position of drop tower

	glPushMatrix();
		glColor3f(0,1,0);
		glTranslatef(vecDt.get_x(), vecDt.get_y(), vecDt.get_z());
		draw_base();

		glTranslatef(100.0,30.0,-100.0);
		
		glPushMatrix();
			glRotatef(-90.0, 1, 0, 0);
			draw_support();
		glPopMatrix();

		glPushMatrix(); 
			glTranslatef(0.0, 40.0, 0.0);
			glTranslatef(0.0, elevator_move, 0.0); 
			glRotatef(90,1,0,0);
			draw_elevator();
		glPopMatrix();
	glPopMatrix();
}

// this is in my music_and_sounds.cpp
#include <iostream>
#include <windows.h>    
#include <string>
#pragma comment(lib, "winmm.lib") 
using namespace std;

void ride_scream (void) {
	PlaySound(TEXT("music_and_sounds/many_girls_screaming"),NULL, SND_ASYNC);
};

void bgm (void) {
	PlaySound(TEXT("music_and_sounds/hikariE"),NULL, SND_ASYNC | SND_LOOP);
};

I had no problem playing just the ride_scream() as when the elevator drops down it does play the music. the only problem is when i added the bgm(). I think that its because of irrKlang but i could be wrong...

[Disch]

OpenGL is just a graphics thing and has absolutely nothing to do with anything audio related.

The problem is that PlaySound is a quick, simple, and dirty way to play audio and isn't at all suitable for an actual game. You're much better off getting a proper audio library and using it.

irrKlang is one such audio library. You should actually use it if you're using it.

Here's the documentation page for irrKlang. It should show you how to work it:

http://www.ambiera.com/irrklang/docu/index.html

I've personally never used it myself, but I'm sure it's better than PlaySound.

[MH4]

Does irrKlang allow 2 sounds to be played consecutively?

[Disch]

I'm sure it does. It wouldn't be much of an audio library if it didn't.