// glTex2dTri.cpp : Defines the entry point for the console application.
//


//#include "stdafx.h"
#include "stdlib.h"
#include "stdio.h"
#include "GL/glut.h"
#include "showPPM.h"

GLfloat xpos = -1.0;

void keyfn(unsigned char key, int x, int y)
{
	printf("Key is #%c#\n", key);
	if(key == 'q') exit(0);
}

void mouseMovefn(int x, int y)
{
	printf("Mouse moved\n");
	glRotatef(10.0, 0.0, 0.0, 1.0);
	glutPostRedisplay();
}

void mousefn(int button, int state, int x, int y)
{
	if(button == GLUT_LEFT_BUTTON && state == GLUT_UP)
		xpos += 0.1;
	glutPostRedisplay();
}

void it(int value)
{
int list = 1;

  printf("menu selection: win=%d, menu=%d\n", glutGetWindow(), glutGetMenu());
  switch (value) {
  case 1:
    if (list == 1) {
      list = 2;
    } else {
      list = 1;
    }
    break;
  case 2:
    exit(0);
    break;
  case 3:
    glutAddMenuEntry("new entry", value + 9);
    break;
  case 4:
    glutChangeToMenuEntry(1, "toggle it for drawing", 1);
    glutChangeToMenuEntry(3, "motion done", 3);
    break;
  default:
    printf("value = %d\n", value);
  }
}

void
menustate(int inuse)
{
  printf("menu is %s\n", inuse ? "INUSE" : "not in use");
  if (!inuse) {
  }
}

void MkMenus()
{
   glutCreateMenu(it);
   glutAddMenuEntry("Dummy Menu", 1);
   glutAddMenuEntry("exit (this works)", 2);
   glutAddMenuEntry("new dummy menu entry", 3);
   glutAddMenuEntry("motion", 4);
   glutAttachMenu(GLUT_RIGHT_BUTTON);
   glutCreateMenu(it);
   glutAddMenuEntry("yes", 1);
   glutAddMenuEntry("no", 2);
   glutAttachMenu(GLUT_MIDDLE_BUTTON);

}


void display()
{
   printf("In Display\n");
   glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
   glColor3f(0.9, 0.9, 0.9);

   glBegin(GL_QUADS);

   glNormal3f(0.0, 0.0, 1.0);  

   glTexCoord2f(0.0, 1.0);
   glColor3f(1.0, 0.0, 0.0);
   glVertex3f(0.0, 1.0, 0.0);

   glTexCoord2f(0.0, 0.0);
   glColor3f(0.0, 1.0, 0.0);
   glVertex3f(0.0, 0.0, 0.0);
   
   glTexCoord2f(1.0, 0.0);
   glColor3f(0.5, 0.5, 0.5);
   glVertex3f(1.0, 0.0, 0.0);
   
   glTexCoord2f(1.0, 1.0);
   glColor3f(0.0, 0.0, 1.0);
   glVertex3f(1.0, 1.0, 0.0);
   
   glEnd();
   
   glutSwapBuffers();
}

void initLights()
{
   GLfloat light_diffuse[] = {0.7, 0.7, 0.7, 1.0};
   GLfloat light_ambient[] = {0.2, 0.2, 0.2, 1.0};
   GLfloat light_position[] = {1.0, 0.0, -1.0, 0.0};

   glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
   glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
   glLightfv(GL_LIGHT0, GL_POSITION, light_position);
   glEnable(GL_LIGHT0);
   glEnable(GL_LIGHTING);
   glShadeModel(GL_FLAT);
}


void setupTexture(char *filename)
{
	GLuint TexName;
	glGenTextures(1, &TexName);
	glBindTexture(GL_TEXTURE_2D, TexName);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  
	TexturePPM(filename);
	glEnable(GL_TEXTURE_2D);
}

main(int argc, char* argv[])
{
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB|GLUT_DEPTH);	
	glutInitWindowPosition(50,50);
	glutInitWindowSize(500,500);
	glutCreateWindow("TEST GLUT");

	glutDisplayFunc(display);
	glutKeyboardFunc(keyfn);
	glutMouseFunc(mousefn);
	glutMotionFunc(mouseMovefn);
	MkMenus();

	setupTexture("img.ppm");
	glEnable(GL_DEPTH_TEST);
	glMatrixMode(GL_PROJECTION);
	gluPerspective(20,1,.001,1000);
	glMatrixMode(GL_MODELVIEW);
	gluLookAt(0,0,5,0,0,0,0,1,0);
	glutMainLoop();
	
	return 0;
}