Join together menu with gameplay

[Marc Colome]

Hello at all.

I'm triying to make the game go to the simulation by pressing 'g'.

I know the menu has so many options, but before I make them useful I want to try this. This is a basic game wich consists of a menu where you have the instructions and you can start or exit the program. If you select start you can select the car (only varies the color of the polygon), the place where you drive (still only changes the polygon color) and a pause menu (restart he car to the center of the screen, go to menu or exit the program).

I had been able to make the menu and the gameplay separately, but not both at the time.

Those things are not implementated yet, since I'm having trouble with the application. Whats the problem? I can't make compatible the car/quad which goes foward, reverse and turns with the menu. Also if any quad is under the declaration of the "menu" and "selection" in Drawscene, it will color the "menu" and "selection".

main

#include <iostream>
#include <stdlib.h>
#include <glut.h>
#include "polygons.h"
#include "imageloader.h"
#include <iomanip>
#include <fstream>
#include <cmath>
#define RADIANS(a) (a * 3.14f / 180.0f)

using namespace std;

//DISTANCIES
//Between options: 0.3145
//between menus: 1.375

float selection = 0.0f;
float cameraheight = 0.0f;
float accept = 0.0f,
	xmove = 0.0f,
	ymove = 0.0f,
	xpos = 0.0f,
	ypos = 0.0f,
	_angle = 0.0f,
	esquerra = 0.0f;

GLuint _textureId;    

void Exit_Func(){
	if (selection == -0.629f){
		if(accept == 4.0f || 1.0f){
				exit(0);
		}
	}
}

void handleKeypress(unsigned char key, int x, int y) {
	switch (key) {
		case 'w':
			xpos += cos(RADIANS(_angle)) * 1.0f;
			ypos += sin(RADIANS(_angle)) * 1.0f;
			selection += 0.3145f;break;
		case 'a':
			ymove -= 1.375f; 
			accept += 1.0f;
			_angle += 20.0f;
			Exit_Func();		break;	
		case 's':
			xpos += cos(RADIANS(_angle)) * 1.0f;
			ypos += sin(RADIANS(_angle)) * 1.0f;
			selection -= 0.3145f;break;
		case 'd':
			ymove += 1.375f; 
			_angle -= 20.0f;
			accept -= 1.0f;			break;	
		
		case '1':
			cameraheight += 0.125f; break;
		case '2':
			cameraheight -= 0.125f; break;
		case 'g':
			esquerra += 10.0f; break;
			
		
	


	}
}

//Makes the image into a texture, and returns the id of the texture
GLuint loadTexture(Image* image) {
	GLuint textureId;
	glGenTextures(1, &textureId);
	glBindTexture(GL_TEXTURE_2D, textureId);
	glTexImage2D(GL_TEXTURE_2D,
				 0,
				 GL_RGB,
				 image->width, image->height,
				 0,
				 GL_RGB,
				 GL_UNSIGNED_BYTE,
				 image->pixels);
	return textureId;
}



//Initializes 3D rendering
void initRendering() {
	glEnable(GL_DEPTH_TEST); 
	glEnable(GL_COLOR_MATERIAL);
	glEnable(GL_LIGHTING);
	glEnable(GL_LIGHT0);
	glEnable(GL_NORMALIZE);
	glEnable(GL_COLOR_MATERIAL);

	Image* image = loadBMP("C:\\menu.bmp"); //EL MENU DEL PRINCIPI ES 1024X512 CUDIDAO EL NOU ES 2048PX
	_textureId = loadTexture(image);
	delete image;

	glClearColor(0.33f, 0.33f, 0.67f, 1.0f);
}

//Called when the window is resized
void handleResize(int w, int h) {
	glViewport(0, 0, w, h);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(45.0, (double)w / (double)h, 0.00001, 200000.0);
}



//Draws the 3D scene
void drawScene() {
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();

	//set cam pos
	glTranslatef(0.0f, -1.0625f - esquerra, -1.75f + cameraheight);
	
	
	////////////////gameplay////////////////////////
		glPushMatrix(); //Save the transformations performed thus far	
		glTranslatef(0.0f, 10.0f, 0.0f);///circuit/////
		glPushMatrix();
		glDisable( GL_BLEND );
		glDisable(GL_TEXTURE_2D);
		glBegin(GL_QUADS);
		 //Red Ferrari
		glVertex3f(-2000.0f, 2000.0f, 0.0f); //Meters (4,5m long per 2,25m wide)
		glVertex3f(2000.0f, 2000.0f, 0.0f);
		glVertex3f(2000.0f, -2000.0f, 0.0f);
		glVertex3f(-2000.0f, -2000.0f, 0.0f);	
		glEnd();
		glPopMatrix();

		///cotxe////
		glTranslatef(-esquerra + xpos, ypos, 0.0f);

		glRotatef(_angle, 0.0f, 0.0f, 1.0f);
		glDisable( GL_BLEND );
		glDisable(GL_TEXTURE_2D);
		glBegin(GL_QUADS);
		 //Red Ferrari
		glVertex3f(-2.25f, 1.0f, 0.01f); //Meters (4,5m long per 2,25m wide)
		glVertex3f(2.25f, 1.0f, 0.01f);
		glVertex3f(2.25f, -1.0f, 0.01f);
		glVertex3f(-2.25f, -1.0f, 0.01f);	
		glEnd();
		glPopMatrix(); //Undo the move of the car

	//MENU
	glDepthMask(false);
	glDisable( GL_BLEND );
	glEnable(GL_TEXTURE_2D);
	glBindTexture(GL_TEXTURE_2D, _textureId);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	
	glPushMatrix();
	glTranslatef( 0.0f , - 0.375f - ymove , 0.0f);
	Menu();
	glPopMatrix();

	//SELECTION
	glDepthMask(true);
	glEnable( GL_BLEND );
    glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
	glPushMatrix();
	glTranslatef( 0.0f , selection , 0.0f);
	Selection();
	glPopMatrix();

	////////////////gameplay////////////////////////
		glPushMatrix(); //Save the transformations performed thus far	
		glTranslatef(0.0f, 10.0f, 0.0f);///circuit/////
		glPushMatrix();
		glBegin(GL_QUADS);
		 //Red Ferrari
		glVertex3f(-2000.0f, 2000.0f, 0.0f); //Meters (4,5m long per 2,25m wide)
		glVertex3f(2000.0f, 2000.0f, 0.0f);
		glVertex3f(2000.0f, -2000.0f, 0.0f);
		glVertex3f(-2000.0f, -2000.0f, 0.0f);	
		glEnd();
		glPopMatrix();

		///cotxe////
		glTranslatef(-esquerra + xpos, ypos, 0.0f);

		glRotatef(_angle, 0.0f, 0.0f, 1.0f);		
		glBegin(GL_QUADS);
		 //Red Ferrari
		glVertex3f(-2.25f, 1.0f, 0.01f); //Meters (4,5m long per 2,25m wide)
		glVertex3f(2.25f, 1.0f, 0.01f);
		glVertex3f(2.25f, -1.0f, 0.01f);
		glVertex3f(-2.25f, -1.0f, 0.01f);	
		glEnd();
		glPopMatrix(); //Undo the move of the car

		glutSwapBuffers();
	
}

void update(int value) {
	glutPostRedisplay();
	glutTimerFunc(25, update, 0);

	/*if (selection < -0.629f - accept * (1.375f)){		
			selection = 0 - accept * (1.375f);
		}
*/
	
	if (selection < -0.64f){
		selection = 0.0f;
	}

	if (selection > 0.0f){
		selection = -0.64f;
	}

	if (ymove < 3.3 * -1.375f){
		ymove = 3* -1.375f;
	}
	
	if (ymove > 1.375f){
		ymove = 1.375f;
	}

	
	


}
	

	




int main(int argc, char** argv) {
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
	glutInitWindowSize(480, 320);
	
	glutCreateWindow("Treball de Recerca - Marc Colomé 2013");
	initRendering();
	
	glutDisplayFunc(drawScene);
	glutKeyboardFunc(handleKeypress);
	glutReshapeFunc(handleResize);	
	glutTimerFunc(25, update, 0);
	
	glutMainLoop();
	return 0;
}