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mainmenu.c
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mainmenu.c
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#include"mainmenu.h"
char* MenuOptions[]= {"Start","About","Exit"};
int flag=0;
int MainMenuPos[]= {3.0,2.0,1.0,0.0,-1};
int initial_flag=1;
int start=1;
int i;
int lasty=60;
float alphaa=0.0;
float y_final=4.0;
void gbps_MM_mouse(int x,int y){
printf("x:%d y:%d diff:%d ",x,y,lasty-y);
if(x>=0 && x<=325){
if(y>=56 && y<=217){
if((lasty-y)<=-40){
for(i=0; i<=40; i++)
{
menu_cur_pos-=0.018;
gbps_RenderMainMenu();
}
lasty=y;
}
}
}
}
void show_new()
{
switch(initial_flag)
{
case 1:
alphaa+=0.025;
break;
case 2:
alphaa-=0.025;
break;
}
}
void render_new_texture()
{
switch (flag)
{
case 1:
tex_app=GBPS_texArr[GBPS_TEXTURE_MENU1];
break;
case 2:
tex_app=GBPS_texArr[GBPS_TEXTURE_MENU2];
break;
}
}
void menu_modify()
{
for(i=0; i<=40; i++)
{
y_final-=0.1;
gbps_RenderMainMenu();
}
render_new_texture();
for(i=0; i<40; i++)
{
y_final+=0.1;
gbps_RenderMainMenu();
}
}
void gbps_EnterMainMenu()
{
selection=0;
menu_cur_pos=MainMenuPos[selection];
flag=1;
render_new_texture();
gbps_PositionReset();
//set the glut functions
glutDisplayFunc(gbps_RenderMainMenu);
glutSpecialFunc(gbps_MainMenuSpecialKey);
glutKeyboardFunc(gbps_MainMenuAsciiKey);
//glutPassiveMotionFunc(gbps_MM_mouse);
gpbs_MainMenuLoop();
}
void gbps_LeaveMainMenu()
{
flag=0;
/*
It's illigal to set the display callback to NULL.
The initgame function will register its own callback function
so we dont have to worry
*/
// glutDisplayFunc(NULL);
glutSpecialFunc(NULL);
glutKeyboardFunc(NULL);
}
void gbps_PositionReset()
{
selection=0;
menu_cur_pos=MainMenuPos[selection];
switch(flag)
{
case 1:
extreme_low=0;
extreme_up=3;
break;
case 2:
extreme_low=0;
extreme_up=4;
break;
}
}
void gbps_mm_EnterEvents()
{
if(initial_flag<2)
return;
switch(flag)
{
case 1:
if(selection==MM_START_GAME)
{
//start game
gbps_LeaveMainMenu();
gbps_EnterGame();
}
if(selection==MM_OPTIONS)
{
flag=2;
menu_modify();
gbps_PositionReset();
}
if(selection==MM_CREDITS)
{
//blah blah
}
if(selection==MM_QUIT)
{
exit(0);
}
break;
case 2:
if(selection==MM_BACK)
{
flag=1;
menu_modify();
gbps_PositionReset();
}
break;
}
}
void gbps_RenderMainMenu()
{
//gbps_PositionReset();
if(alphaa>1.0)
{
initial_flag=2;
//alphaa=0;
}
show_new();
if(alphaa<0)
{
start=2;
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glDisable( GL_TEXTURE_2D );
gluLookAt(-0,0,10.0,0,0,0,0,1.0,0.0);
//selection
/*glPushMatrix();
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, GBPS_texArr[GBPS_TEXTURE_MENUBACK]);
glScalef(4.3,4.3,1.0);
glTranslatef(0,0,-5.0);
glBegin(GL_QUADS);
glTexCoord2f(0.0,0);
glVertex2f(-2.0,-1.5);
glTexCoord2f(1.0,0);
glVertex2f(2.0,-1.5);
glTexCoord2f(1.0,1.0);
glVertex2f(2.0,1.5);
glTexCoord2f(0.0,1.0);
glVertex2f(-2.0,1.5);
glEnd();
glDisable(GL_TEXTURE_2D);
glPopMatrix();
glPushMatrix();
glPushMatrix();
glEnable(GL_BLEND); // Turn Blending On
glDisable(GL_DEPTH_TEST);
glColor4f(1.0,1.0,1.0,0.2);
glBlendFunc(GL_SRC_ALPHA,GL_ONE);
glTranslatef(-5.0,menu_cur_pos,0);
glScalef(1.0,0.8,1.0);
glBegin(GL_QUADS);
glTexCoord2f(0.0,0);
glVertex2f(0,0);
glTexCoord2f(1.0,0);
glVertex2f(5.0,0);
glTexCoord2f(1.0,1.0);
glVertex2f(5.0+menu_cur_pos/3,1.0);
glTexCoord2f(0.0,1.0);
glVertex2f(0-menu_cur_pos/20,1.0);
glEnd();
glDisable(GL_BLEND); // Turn B
glEnable(GL_DEPTH_TEST);
glColor4f(1.0,1.0,1.0,1.0);
glPopMatrix();
glPushMatrix();
glEnable(GL_BLEND); // Turn Blending On
glDisable(GL_DEPTH_TEST);
glColor4f(1.0,1.0,1.0,0.9);
glBlendFunc(GL_SRC_ALPHA,GL_ONE);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, GBPS_texArr[GBPS_TEXTURE_MENU1]);
glTranslatef(0,0.5,-2.0);
glBegin(GL_QUADS);
glTexCoord2f(0.0,0);
glVertex2f(-7.0,0);
glTexCoord2f(1.0,0);
glVertex2f(0.0,0);
glTexCoord2f(1.0,1.0);
glVertex2f(0.0,4.0);
glTexCoord2f(0.0,1.0);
glVertex2f(-7.0,4.0);
glEnd();
glDisable(GL_BLEND); // Turn B
glEnable(GL_DEPTH_TEST);
glDisable(GL_TEXTURE_2D);
glColor4f(1.0,1.0,1.0,1.0);
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
*/
if(start==1){
glPushMatrix();
glDisable(GL_LIGHTING);
glDisable(GL_LIGHT0);
glEnable(GL_BLEND); // Turn Blending On
glDisable(GL_DEPTH_TEST);
glBlendFunc(GL_SRC_ALPHA,GL_ONE);
glColor4f(1.0,1.0,1.0,alphaa);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, GBPS_texArr[GBPS_intro]);
//printf("%f",alphaa);
glBegin(GL_QUADS);
glTexCoord2f(0.0,0);glVertex2f(-4.0,-3.0);
glTexCoord2f(1.0,0);glVertex2f(4.0,-3.0);
glTexCoord2f(1.0,1.0);glVertex2f(4.0, 3.0);
glTexCoord2f(0.0,1.0);glVertex2f(-4.0,3.0);
glEnd();
glDisable(GL_TEXTURE_2D);
glDisable(GL_BLEND); // Turn B
glEnable(GL_DEPTH_TEST);
glColor4f(1.0,1.0,1.0,1.0);
glPopMatrix();
}
else{
glPushMatrix();
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, GBPS_texArr[GBPS_TEXTURE_MENUBACK]);
glScalef(4.3,4.3,1.0);
glTranslatef(0,0,-5.0);
glBegin(GL_QUADS);
glTexCoord2f(0.0,0);glVertex2f(-2.0,-1.5);
glTexCoord2f(1.0,0);glVertex2f(2.0,-1.5);
glTexCoord2f(1.0,1.0);glVertex2f(2.0,1.5);
glTexCoord2f(0.0,1.0);glVertex2f(-2.0,1.5);
glEnd();
glDisable(GL_TEXTURE_2D);
glPopMatrix();
glPushMatrix();
glPushMatrix();
glEnable(GL_BLEND); // Turn Blending On
//glDisable(GL_DEPTH_TEST);
glColor4f(1.0,1.0,1.0,0.3);
glBlendFunc(GL_SRC_ALPHA,GL_ONE);
glScalef(0.8,0.7,1.0);
glTranslatef(0.0,0.6,0.00);
glTranslatef(-5.0,menu_cur_pos,0.00);
glScalef(1.0,0.8,1.0);
glBegin(GL_QUADS);
glTexCoord2f(0.0,0);glVertex2f(0,0);
glTexCoord2f(1.0,0);glVertex2f(5.0,0);
glTexCoord2f(1.0,1.0);glVertex2f(5.0+menu_cur_pos/3,1.0);
glTexCoord2f(0.0,1.0);glVertex2f(0-menu_cur_pos/20,1.0);
glEnd();
glDisable(GL_BLEND); // Turn B
glEnable(GL_DEPTH_TEST);
glColor4f(1.0,1.0,1.0,1.0);
glPopMatrix();
//for menu
glPushMatrix();
glEnable(GL_BLEND); // Turn Blending On
glDisable(GL_DEPTH_TEST);
glColor4f(1.0,1.0,1.0,0.9);
glBlendFunc(GL_SRC_ALPHA,GL_ONE);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, tex_app);
glTranslatef(0,0.5,-2.0);
glScalef(0.8,0.8,1.0);
glBegin(GL_QUADS);
glTexCoord2f(0.0,0);glVertex2f(-7.0,0);
glTexCoord2f(1.0,0);glVertex2f(0.0,0);
glTexCoord2f(1.0,1.0);glVertex2f(0.0, y_final);
glTexCoord2f(0.0,1.0);glVertex2f(-7.0, y_final);
glEnd();
glDisable(GL_BLEND); // Turn B
glEnable(GL_DEPTH_TEST);
glDisable(GL_TEXTURE_2D);
glColor4f(1.0,1.0,1.0,1.0);
glPopMatrix();
}
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
void gbps_MainMenuSpecialKey(int key, int x, int y)
{
switch (key)
{
case GLUT_KEY_LEFT :
break;
case GLUT_KEY_RIGHT :
break;
case GLUT_KEY_UP :
if(selection>extreme_low)
{
menu_cur_pos=MainMenuPos[selection];
//printf("key up top condition selection=%d and el=%d and eu=%d\n",selection,extreme_low,extreme_up);
for(i=0; i<=40; i++)
{
menu_cur_pos+=0.025;
gbps_RenderMainMenu();
}
selection--;
}
else
{
//printf("key up down condition selection=%d and el=%d and eu=%d\n",selection,extreme_low,extreme_up);
selection=extreme_up;
}
menu_cur_pos=MainMenuPos[selection];
gbps_RenderMainMenu();
break;
case GLUT_KEY_DOWN :
if(selection<extreme_up)
{
menu_cur_pos=MainMenuPos[selection];
//printf("key down top condition selection=%d and el=%d and eu=%d\n",selection,extreme_low,extreme_up);
for(i=0; i<=40; i++)
{
menu_cur_pos-=0.025;
gbps_RenderMainMenu();
}
selection++;
}
else
{
//printf("key down down condition selection=%d and el=%d and eu=%d\n",selection,extreme_low,extreme_up);
selection=extreme_low;
}
menu_cur_pos=MainMenuPos[selection];
gbps_RenderMainMenu();
break;
}
}
void gbps_MainMenuAsciiKey(int key, int x, int y)
{
switch (key)
{
case 27:
exit(0);
break;
case 13:
gbps_mm_EnterEvents();
break;
}
}
void gpbs_MainMenuLoop()
{
if(flag>0)
{
glutPostRedisplay();
glutTimerFunc(GBPS_nf,gpbs_MainMenuLoop,0);
}
else
{
//do nothing....
}
}