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|
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>
#include <GL/glut.h>
//#include <GL/glx.h>
#include <GL/gl.h>
//#include <X11/extensions/xf86vmode.h>
//#include <X11/keysym.h>
#include "bmp.h"
#define MAP_SIZE 1024 /* Size Of Our .RAW Height Map */
#define STEP_SIZE 16 /* Width And Height Of Each Quad */
#define HEIGHT_RATIO 1.5f /* Ratio That The Y Is Scaled According To The X And Z */
#define MAX_NO_TEXTURES 1
// variables globales ... glut oblige !
//tableau de texture
GLuint texture_id[MAX_NO_TEXTURES];
// position et orientation du point de vue
float camera_x, camera_y, camera_z;
float camera_angle_x,camera_angle_y,camera_angle_z;
// timer pour l'animation
int timer;
int timer_start;
int timer_rate;
//BOOL bRender = True; /* Polygon Flag Set To TRUE By Default */
int bRender = 1; /* Polygon Flag Set To TRUE By Default */
unsigned char g_HeightMap[MAP_SIZE*MAP_SIZE]; /* Holds The Height Map Data */
float scaleValue = 0.15f; /* Scale Value For The Terrain */
// conversion degres vers radians
float radians(float d)
{
return d * 0.0174532925;
}
/* Loads The .RAW File And Stores It In pHeightMap */
void LoadRawFile(const char* strName, int nSize,unsigned char *pHeightMap)
{
int result;
FILE *pFile = NULL;
/* Open The File In Read / Binary Mode. */
pFile = fopen( strName, "rb" );
/* Check To See If We Found The File And Could Open It */
if ( pFile == NULL )
{
/* Display Error Message And Stop The Function */
printf("Error can't Find The Height Map!\n");
return;
}
fread( pHeightMap, 1, nSize, pFile );
/* After We Read The Data, It's A Good Idea To Check If Everything Read Fine */
result = ferror( pFile );
/* Check If We Received An Error */
if (result)
{
printf("Error failed To Get Data!\n");
}
/* Close The File. */
fclose(pFile);
}
int Height(unsigned char *pHeightMap, int X, int Y) /* This Returns The Height From A Height Map Index */
{
int x = X % MAP_SIZE; /* Error Check Our x Value */
int y = Y % MAP_SIZE; /* Error Check Our y Value */
if(!pHeightMap) return 0; /* Make Sure Our Data Is Valid */
return pHeightMap[x + (y * MAP_SIZE)]; /* Index Into Our Height Array And Return The Height */
}
void SetVertexColor(unsigned char *pHeightMap, int x, int y) /* Sets The Color Value For A Particular Index, Depending On The Height Index */
{
if(!pHeightMap)
return; /* Make Sure Our Height Data Is Valid */
else
{
float fColor = -0.15f + (Height(pHeightMap, x, y ) / 256.0f);
/* Assign This Blue Shade To The Current Vertex */
glColor3f(0, 0, fColor );
}
}
void RenderHeightMap(unsigned char pHeightMap[]) // This Renders The Height Map As Quads
{
int X = 0, Y = 0; // Create Some Variables To Walk The Array With.
int x, y, z; // Create Some Variables For Readability
//->
GLfloat Text_height = 0.0f;
GLfloat Text_width = 0.0f;
//<-
if(!pHeightMap) return; // Make Sure Our Height Data Is Valid
if(bRender) // What We Want To Render
glBegin( GL_QUADS ); // Render Polygons
else
glBegin( GL_LINES ); // Render Lines Instead
for ( X = 0; X < MAP_SIZE; X += STEP_SIZE )
for ( Y = 0; Y < MAP_SIZE; Y += STEP_SIZE )
{
//bottom left->
//->
// Get The (X, Y, Z) Value For The Bottom Left Vertex
x = X;
y = Height(pHeightMap, X, Y );
z = Y;
if(bRender)
{
if(X == 0)
Text_width = 0.0f;
else
Text_width = (GLfloat) X / MAP_SIZE;
if(Y == 0)
Text_height = 0.0f;
else
Text_height = (GLfloat) Y / MAP_SIZE;
glTexCoord2f(Text_width, Text_height);
}else{
// Set The Color Value Of The Current Vertex
SetVertexColor(pHeightMap, x, z);
}
//<-
glVertex3i(x, y, z); // Send This Vertex To OpenGL To Be Rendered (Integer Points Are Faster)
//<-bottom left
//top left->
//->
// Get The (X, Y, Z) Value For The Top Left Vertex
x = X;
y = Height(pHeightMap, X, Y + STEP_SIZE );
z = Y + STEP_SIZE ;
if(bRender)
{
if(X == 0)
Text_width = 0.0f;
else
Text_width = (GLfloat) X / MAP_SIZE;
if(Y == 0)
Text_height = 0.0f;
else
Text_height = (GLfloat) (Y + STEP_SIZE) / MAP_SIZE;
glTexCoord2f(Text_width, Text_height);
}else{
// Set The Color Value Of The Current Vertex
SetVertexColor(pHeightMap, x, z);
}
//<-
glVertex3i(x, y, z); // Send This Vertex To OpenGL To Be Rendered
//<-top left
//top right->
//->
// Get The (X, Y, Z) Value For The Top Right Vertex
x = X + STEP_SIZE;
y = Height(pHeightMap, X + STEP_SIZE, Y + STEP_SIZE );
z = Y + STEP_SIZE ;
if(bRender)
{
if(X == 0)
Text_width = 0.0f;
else
Text_width = (GLfloat) (X + STEP_SIZE) / MAP_SIZE;
if(Y == 0)
Text_height = 0.0f;
else
Text_height = (GLfloat) (Y + STEP_SIZE) / MAP_SIZE;
glTexCoord2f(Text_width, Text_height);
}else{
// Set The Color Value Of The Current Vertex
SetVertexColor(pHeightMap, x, z);
}
//<-
glVertex3i(x, y, z); // Send This Vertex To OpenGL To Be Rendered
//<-top right
//bottom right->
//->
// Get The (X, Y, Z) Value For The Bottom Right Vertex
x = X + STEP_SIZE;
y = Height(pHeightMap, X + STEP_SIZE, Y );
z = Y;
if(bRender)
{
if(X == 0)
Text_width = 0.0f;
else
Text_width = (GLfloat) (X + STEP_SIZE) / MAP_SIZE;
if(Y == 0)
Text_height = 0.0f;
else
Text_height = (GLfloat) Y / MAP_SIZE;
glTexCoord2f(Text_width, Text_height);
}else{
// Set The Color Value Of The Current Vertex
SetVertexColor(pHeightMap, x, z);
}
//<-
glVertex3i(x, y, z); // Send This Vertex To OpenGL To Be Rendered
//<-bottom right
}
glEnd();
glColor4f(1.0f, 1.0f, 1.0f, 1.0f); // Reset The Color
}
//Bool loadGLTextures(char *filename) /* Load Bitmaps And Convert To Textures */
int loadGLTextures(char *filename_texture,char *filename_courbe,char* ecrase_image,char* calcul_altitude) /* Load Bitmaps And Convert To Textures */
{
int status;
BMP* texture;
BMP* courbe;
int result;
status = 0;
texture = New_Bmp(filename_texture);
printf("image de la texture chargee\n");
Load_Bmp(texture->file_name, texture);
courbe = New_Bmp(filename_courbe);
printf("image des courbes chargee\n");
Load_Bmp(courbe->file_name, courbe);
Load_Curve(courbe);
printf("image des courbes chargee\n");
result = Generate_Waves(courbe);
printf("courbes reconnues\n");
Make_Median_Axis(courbe);
printf("calcul des axes medians effectue\n");
if(strcmp(calcul_altitude,"calcul")==0)
{
printf("calcul des altitudes en cours\n");
Calcul_Altitude(courbe);
printf("calcul des altitudes effectue\n");
}
if(strcmp(ecrase_image,"ecrase")==0)
{
Write_Bmp(courbe);
}
if (Get_Loaded(texture)==1)
{
//status = True;
status = 1;
glGenTextures(1, &texture_id[0]); /* create the texture */
glBindTexture(GL_TEXTURE_2D, texture_id[0]);
/* actually generate the texture */
glTexImage2D(
GL_TEXTURE_2D,
0, 3, Get_Width(texture), Get_Height(texture), 0,
GL_RGB, GL_UNSIGNED_BYTE, Get_Data(texture));
/* enable linear filtering */
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
}
/* free the ram we used in our texture generation process */
if (Get_Loaded(texture)==1)
{
Close_Bmp(texture);
}
if (Get_Loaded(courbe)==1)
{
Close_Bmp(courbe);
}
return status;
}
// affiche la scene complete
void scene(void)
{
/* // utilise le temps courant pour modifier une caracteristique de chaque objet
glPushMatrix();
glRotatef((timer*2)%180, 0., 1., 0);
glColor3f ((float) (timer % 300) / 300., 1.0, (float) (timer % 100) / 100.);
cube(0, 10*cos(radians(timer % 360)), 0, 2);
glPopMatrix();
glColor3f (1., 0., 0.);
cube(10, 0, 0, 2+sin(radians(timer % 360)));
glColor3f(0., 0., 1.);
cube(0, 0, 10, 2+cos(radians(timer % 180)));
*/
}
// callback de glut : affichage
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // efface l'ecran et le z-buffer
glMatrixMode(GL_MODELVIEW); // selectionne la matrice de la scene
//glMatrixMode(GL_PROJECTION);
glLoadIdentity(); // reinitialise les transformations
// positionne la scene par rapport a la camera qui est restee en 0,0,0
glRotatef(-camera_angle_x, 1., 0., 0);
glRotatef(-camera_angle_y, 0., 1., 0);
//glRotatef(-camera_angle_z, 0., 0., 1);
glTranslatef(-camera_x, -camera_y, -camera_z);
// desssine la scene
//scene();
glScalef(scaleValue, scaleValue * HEIGHT_RATIO, scaleValue);
RenderHeightMap(g_HeightMap); /* Render The Height Map */
// termine l'affichage
glFlush();
// echange le buffer de dessin et le buffer d'affichage
glutSwapBuffers();
}
// callback de glut : appellee regulierement
void anime(void)
{
int c;
#if 1
usleep(1000000. / timer_rate);
timer++;
// demande un nouvel affichage si le temps ecoule correspond a la frequence d'animation definie
glutPostRedisplay();
#else
c= clock();
if((c - timer_start)*timer_rate > CLOCKS_PER_SEC)
{
timer++;
timer_start= c;
// demande un nouvel affichage si le temps ecoule correspond a la frequence d'animation definie
glutPostRedisplay();
}
#endif
}
// callback de glut : gestion du clavier (touches speciales)
void keyboard(int key, int x, int y)
{
switch(key)
{
/*case GLUT_KEY_UP:
// deplacement de la camera dans la direction de la visee
camera_z-= cos(radians(camera_angle));
camera_x-= sin(radians(camera_angle));
break;
case GLUT_KEY_DOWN:
// deplacement de la camera dans la direction opposee de la visee
camera_z+= cos(radians(camera_angle));
camera_x+= sin(radians(camera_angle));
break;
case GLUT_KEY_LEFT:
// rotation de la camera sur Y-
camera_angle+= 4.;
if(camera_angle >= 360.)
camera_angle= 0.;
break;
case GLUT_KEY_RIGHT:
camera_angle-= 4.;
if(camera_angle < 0.)
camera_angle= 359.;
break;
case GLUT_KEY_PAGE_UP:
camera_y+=10.0;
break;
case GLUT_KEY_PAGE_DOWN:
camera_y-=10.0;
break;
default:
break;*/
case GLUT_KEY_UP:
camera_angle_x+= 4.;
if(camera_angle_x >= 360.)
camera_angle_x= 0.;
break;
case GLUT_KEY_DOWN:
camera_angle_x-= 4.;
if(camera_angle_x < 0.)
camera_angle_x= 359.;
break;
case GLUT_KEY_LEFT:
camera_angle_y+= 4.;
if(camera_angle_y >= 360.)
camera_angle_y= 0.;
break;
case GLUT_KEY_RIGHT:
camera_angle_y-= 4.;
if(camera_angle_y < 0.)
camera_angle_y= 359.;
break;
case GLUT_KEY_PAGE_UP:
// deplacement de la camera dans la direction de la visee
camera_z-= cos(radians(camera_angle_y));
camera_x-= sin(radians(camera_angle_x));
break;
case GLUT_KEY_PAGE_DOWN:
// deplacement de la camera dans la direction opposee de la visee
camera_z+= cos(radians(camera_angle_y));
camera_x+= sin(radians(camera_angle_x));
break;
case GLUT_KEY_INSERT:
camera_x= 50.;
camera_y= 100.;
camera_z= 50.;
camera_angle_x= -45.;
camera_angle_y= -180.;
camera_angle_z= 0.;
default:
break;
}
// provoque un affichage (appel du callback display)
glutPostRedisplay();
}
// mise en place des parametres d'openGL
void init (char *filename_texture,char *filename_courbe,char* ecrase_image,char* calcul_altitude)
{
// precise la couleur pour effacer l'ecran
if (!loadGLTextures(filename_texture,filename_courbe,ecrase_image,calcul_altitude))
{
return ;
}
glShadeModel (GL_SMOOTH); // Enable Smooth Shading
glClearColor (0.0f, 0.0f, 0.0f, 0.5f); // Black Background
glEnable (GL_COLOR_MATERIAL );
glColorMaterial (GL_FRONT, GL_AMBIENT_AND_DIFFUSE );
glEnable (GL_TEXTURE_2D );
glPixelStorei (GL_UNPACK_ALIGNMENT, 1 );
glGenTextures (1, texture_id);
// precise la profondeur pour effacer le z-buffer
glClearDepth(1.0);
// demande a effectuer un test sur le z-buffer pendant l'affichage
glEnable(GL_DEPTH_TEST);
// precise le test
glDepthFunc(GL_LEQUAL);
// definit la projection
glMatrixMode(GL_PROJECTION); // selectionne la matrice de visualisation
glLoadIdentity(); // reintialise les transformations
#if 0
glOrtho(-1000.0, 1000.0, -1000.0, 1000.0, -1000.0, 1000.0); // definit une projection orthographique
#else
gluPerspective(50., 1., 1., 100.);
#endif
// position de la camera au debut de l'animation
camera_x= 50.;
camera_y= 100.;
camera_z= 50.;
camera_angle_x= -45.;
camera_angle_y= -180.;
camera_angle_z= 0.;
// gestion de la vitesse de l'animation
timer= 0;
timer_start= clock();
timer_rate= 50;
//LoadRawFile("../Data/Terrain.raw", MAP_SIZE * MAP_SIZE, g_HeightMap); /* Load raw data */
LoadRawFile("Terrain.raw", MAP_SIZE * MAP_SIZE, g_HeightMap); /* Load raw data */
}
int main(int argc, char** argv)
{
glutInit(&argc, argv);
// initialisation du mode d'affichage :
// GLUT_DOUBLE demande 2 buffers, un pour dessiner sans afficher, l'autre pour afficher
// GLUT_DEPTH demande 1 z-buffer
// GLUT_RGB demande un RGB 24 bits
glutInitDisplayMode (GLUT_DOUBLE | GLUT_DEPTH | GLUT_RGB);
glutInitWindowSize (400, 400);
glutInitWindowPosition (100, 100);
glutCreateWindow ("Ca bouge !!! (fleches, page up down)");
init(argv[1],argv[2],argv[3],argv[4]);
// enregistre l'action des evenements claviers
glutSpecialFunc(keyboard);
// enregistre l'action des evenements d'affichage
glutDisplayFunc(display);
// enregistre l'action a executer en manque d'evenements
glutIdleFunc(anime);
// lance la boucle de gestion des evenements
glutMainLoop();
return 0;
} |
probleme mouvement dans un paysage
Envoyé par nonoRedDevils
les coordonnées de la position initiale?
........vu que j'utilise aussi des glrotate, c'est peut etre pour ca que je le vois disparaitre, non?
[/quote]
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