+++ /dev/null
-/***********************************************************************
-
-FONCTION :
-----------
-Gestion des light sous OpenGL
-
-
-REMARQUES:
-----------
-
-- We can't take in account GL_QUADRATIC_ATTENUATION.
-
-- Position des lumieres. Il faut faire le glLight(GL_POSITION) apres la
-gestion des matrices de transformation (GL_MODELVIEW).
-
-- Se mefier de GL_POSITION pour les lumieres directionelle. GL_POSITION
-indique bien la position ou se trouve la lumiere. Comme on a une direction
-comme valeur il faut l'inverser.
-
-
-FONCTIONNEMENT:
----------------
-- La variable lightOn permet d'optimiser le changement d'etat des lumieres.
-Ceci permet d'eviter d'appeler glIsEnable(GL_LIGHTING). Il faut bien sur
-que l'on utilise les 2 points d'entree LightOn() et LightOff().
-L'init de la variable est faite par call_func_redraw_all_structs (OpenGl_funcs.c)
-
-
-HISTORIQUE DES MODIFICATIONS :
---------------------------------
-20-06-97 : PCT ; creation
-30-06-96 : FMN ; Integration
-18-07-96 : FMN, PCT ; Correction indice, ajout IsLightOn()
-25-07-97 : CAL ; Portage NT (include OpenGl_tgl_all.h)
-07-10-97 : FMN ; Simplification WNT
-
-************************************************************************/
-
-/*----------------------------------------------------------------------*/
-/*
-* Includes
-*/
-
-#include <OpenGl_tgl_all.hxx>
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#include <math.h>
-#include <memory.h>
-
-#include <OpenGl_LightBox.hxx>
-#include <OpenGl_Memory.hxx>
-
-/*----------------------------------------------------------------------*/
-/*
-* Constantes
-*/
-#ifndef DEBUG
-#define DEBUG 0
-#endif
-
-#define NO_PRINT_DEBUG
-
-#define GROW_SIZE_WKS 10
-#define GROW_SIZE_LIGHT 8
-
-/*----------------------------------------------------------------------*/
-/*
-* Types definis
-*/
-struct TEL_LIGHT_DATA
-{
- Tint LightID;
- TEL_LIGHT light;
- IMPLEMENT_MEMORY_OPERATORS
-};
-
-struct TEL_LIGHT_WKS
-{
- Tint wks;
- int lights_count;
- int lights_size;
- TEL_LIGHT_DATA *lights;
- IMPLEMENT_MEMORY_OPERATORS
-};
-
-
-/*----------------------------------------------------------------------*/
-/*
-* Variables statiques
-*/
-
-static TEL_LIGHT_WKS *wks = NULL;
-static int wks_count = 0;
-static int wks_size = 0;
-
-static GLfloat default_amb[4] = { 0.0, 0.0, 0.0, 1.0 };
-static GLfloat default_sptdir[3] = { 0.0, 0.0, -1.0 };
-static GLfloat default_sptexpo = 0.0;
-static GLfloat default_sptcutoff = 180.0;
-
-static GLboolean lightOn = GL_FALSE;
-
-/*----------------------------------------------------------------------*/
-/*
-* Fonctions privees
-*/
-
-/*-----------------------------------------------------------------*/
-/*
-* Set des lumieres
-*/
-static void bind_light(TEL_LIGHT *lptr, int *gl_lid)
-{
- GLfloat data_amb[4];
- GLfloat data_diffu[4];
- GLfloat data_pos[4];
- GLfloat data_sptdir[3];
- GLfloat data_sptexpo;
- GLfloat data_sptcutoff;
- GLfloat data_constantattenuation;
- GLfloat data_linearattenuation;
- GLint cur_matrix;
-
-
- /* on n'a droit qu'a 8 lights avec OpenGL... */
- if (*gl_lid > GL_LIGHT7) return;
-
-
- /* la light est une headlight ? */
- if (lptr->HeadLight)
- {
- glGetIntegerv(GL_MATRIX_MODE, &cur_matrix);
- glMatrixMode(GL_MODELVIEW);
- glPushMatrix();
- glLoadIdentity();
- }
-
-
- /* set la light en fonction de son type */
- switch (lptr->type)
- {
- case TLightAmbient:
- data_amb[0] = lptr->col.rgb[0];
- data_amb[1] = lptr->col.rgb[1];
- data_amb[2] = lptr->col.rgb[2];
- data_amb[3] = 1.0;
-
- /*------------------------- Ambient ---------------------------*/
- /*
- * The GL_AMBIENT parameter refers to RGBA intensity of the ambient
- * light.
- */
- glLightModelfv(GL_LIGHT_MODEL_AMBIENT, data_amb);
-
-#if DEBUG
- printf("OpenGL_LightBox::bind_light:LightAmbient \n");
- printf("\tGL_LIGHT_MODEL_AMBIENT %f %f %f \n", data_amb[0], data_amb[1], data_amb[2]);
-#endif
- break;
-
-
- case TLightDirectional:
- data_diffu[0] = lptr->col.rgb[0];
- data_diffu[1] = lptr->col.rgb[1];
- data_diffu[2] = lptr->col.rgb[2];
- data_diffu[3] = 1.0;
-
- /*------------------------- Direction ---------------------------*/
- /* From Open GL Programming Rev 1 Guide Chapt 6 :
- Lighting The Mathematics of Lighting ( p 168 )
-
- Directional Light Source ( Infinite ) :
- if the last parameter of GL_POSITION , w , is zero, the
- corresponding light source is a Directional one.
-
- GL_SPOT_CUTOFF a 180 signifie que ce n'est pas un spot.
- To create a realistic effect, set the GL_SPECULAR parameter
- to the same value as the GL_DIFFUSE.
- */
-
- data_pos[0] = -lptr->dir[0];
- data_pos[1] = -lptr->dir[1];
- data_pos[2] = -lptr->dir[2];
- data_pos[3] = 0.0;
-
- glLightfv(*gl_lid, GL_AMBIENT, default_amb);
- glLightfv(*gl_lid, GL_DIFFUSE, data_diffu);
- glLightfv(*gl_lid, GL_SPECULAR, data_diffu);
-
- glLightfv(*gl_lid, GL_POSITION, data_pos);
- glLightfv(*gl_lid, GL_SPOT_DIRECTION, default_sptdir);
- glLightf(*gl_lid, GL_SPOT_EXPONENT, default_sptexpo);
- glLightf(*gl_lid, GL_SPOT_CUTOFF, default_sptcutoff);
-
-#if DEBUG
- printf("OpenGL_LightBox::bind_light:LightDirection \n");
- printf("\tGL_AMBIENT %f %f %f \n", default_amb[0], default_amb[1], default_amb[2]);
- printf("\tGL_DIFFUSE %f %f %f \n", data_diffu[0], data_diffu[1], data_diffu[2]);
- printf("\tGL_SPECULAR %f %f %f \n", data_diffu[0], data_diffu[1], data_diffu[2]);
- printf("\tGL_POSITION %f %f %f \n", data_pos[0], data_pos[1], data_pos[2]);
-#endif
- break;
-
-
- case TLightPositional:
- data_diffu[0] = lptr->col.rgb[0];
- data_diffu[1] = lptr->col.rgb[1];
- data_diffu[2] = lptr->col.rgb[2];
- data_diffu[3] = 1.0;
-
- /*------------------------- Position -----------------------------*/
- /* From Open GL Programming Rev 1 Guide Chapt 6 :
- Lighting The Mathematics of Lighting ( p 168 )
- Positional Light Source :
- if the last parameter of GL_POSITION , w , is nonzero,
- the corresponding light source is a Positional one.
-
- GL_SPOT_CUTOFF a 180 signifie que ce n'est pas un spot.
-
- To create a realistic effect, set the GL_SPECULAR parameter
- to the same value as the GL_DIFFUSE.
- */
-
- data_pos[0] = lptr->pos[0];
- data_pos[1] = lptr->pos[1];
- data_pos[2] = lptr->pos[2];
- data_pos[3] = 1.0;
-
- data_constantattenuation = lptr->atten[0];
- data_linearattenuation = lptr->atten[1];
-
- glLightfv(*gl_lid, GL_AMBIENT, default_amb);
- glLightfv(*gl_lid, GL_DIFFUSE, data_diffu);
- glLightfv(*gl_lid, GL_SPECULAR, data_diffu);
-
- glLightfv(*gl_lid, GL_POSITION, data_pos);
- glLightfv(*gl_lid, GL_SPOT_DIRECTION, default_sptdir);
- glLightf(*gl_lid, GL_SPOT_EXPONENT, default_sptexpo);
- glLightf(*gl_lid, GL_SPOT_CUTOFF, default_sptcutoff);
- glLightf(*gl_lid, GL_CONSTANT_ATTENUATION, data_constantattenuation);
- glLightf(*gl_lid, GL_LINEAR_ATTENUATION, data_linearattenuation);
- glLightf(*gl_lid, GL_QUADRATIC_ATTENUATION, 0.0);
-
-#if DEBUG
- printf("OpenGL_LightBox::bind_light:LightPosition \n");
- printf("\tGL_AMBIENT %f %f %f \n", default_amb[0], default_amb[1], default_amb[2]);
- printf("\tGL_DIFFUSE %f %f %f \n", data_diffu[0], data_diffu[1], data_diffu[2]);
- printf("\tGL_SPECULAR %f %f %f \n", data_diffu[0], data_diffu[1], data_diffu[2]);
- printf("\tGL_POSITION %f %f %f \n", data_pos[0], data_pos[1], data_pos[2]);
-#endif
- break;
-
-
- case TLightSpot:
- data_diffu[0] = lptr->col.rgb[0];
- data_diffu[1] = lptr->col.rgb[1];
- data_diffu[2] = lptr->col.rgb[2];
- data_diffu[3] = 1.0;
-
- data_pos[0] = lptr->pos[0];
- data_pos[1] = lptr->pos[1];
- data_pos[2] = lptr->pos[2];
- data_pos[3] = 1.0;
-
- data_sptdir[0] = lptr->dir[0];
- data_sptdir[1] = lptr->dir[1];
- data_sptdir[2] = lptr->dir[2];
-
- data_sptexpo = ( float )lptr->shine * 128.0F;
- data_sptcutoff = ( float )(lptr->angle * 180.0F)/( float )M_PI;
-
- data_constantattenuation = lptr->atten[0];
- data_linearattenuation = lptr->atten[1];
-
- glLightfv(*gl_lid, GL_AMBIENT, default_amb);
- glLightfv(*gl_lid, GL_DIFFUSE, data_diffu);
- glLightfv(*gl_lid, GL_SPECULAR, data_diffu);
-
- glLightfv(*gl_lid, GL_POSITION, data_pos);
- glLightfv(*gl_lid, GL_SPOT_DIRECTION, data_sptdir);
- glLightf(*gl_lid, GL_SPOT_EXPONENT, data_sptexpo);
- glLightf(*gl_lid, GL_SPOT_CUTOFF, data_sptcutoff);
- glLightf(*gl_lid, GL_CONSTANT_ATTENUATION, data_constantattenuation);
- glLightf(*gl_lid, GL_LINEAR_ATTENUATION, data_linearattenuation);
- glLightf(*gl_lid, GL_QUADRATIC_ATTENUATION, 0.0);
-
-#if DEBUG
- printf("OpenGL_LightBox::bind_light:LightSpot \n");
- printf("\tGL_AMBIENT %f %f %f \n", default_amb[0], default_amb[1], default_amb[2]);
- printf("\tGL_DIFFUSE %f %f %f \n", data_diffu[0], data_diffu[1], data_diffu[2]);
- printf("\tGL_SPECULAR %f %f %f \n", data_diffu[0], data_diffu[1], data_diffu[2]);
- printf("\tGL_POSITION %f %f %f \n", data_pos[0], data_pos[1], data_pos[2]);
- printf("\tGL_SPOT_DIRECTION %f %f %f \n", data_sptdir[0], data_sptdir[1], data_sptdir[2]);
- printf("\tGL_SPOT_EXPONENT %f \n", data_sptexpo);
- printf("\tGL_SPOT_CUTOFF %f \n", data_sptcutoff);
- printf("\tGL_CONSTANT_ATTENUATION %f \n", data_constantattenuation);
- printf("\tGL_LINEAR_ATTENUATION %f \n", data_linearattenuation);
-#endif
- break;
- }
-
-
- if (lptr->type != TLightAmbient)
- {
-#if DEBUG
- printf("OpenGL_LightBox::bind_light:glEnable %d \n", *gl_lid);
-#endif
- glEnable(*gl_lid);
- (*gl_lid)++;
- }
-
-
- /* si la light etait une headlight alors restaure la matrice precedente */
- if (lptr->HeadLight)
- {
- glPopMatrix();
- glMatrixMode(cur_matrix);
- }
-}
-
-
-/*-----------------------------------------------------------------*/
-/*
-* recherche de la liste de lampe d'une wks, creation d'une liste si non existante
-*/
-static int find_wks(Tint WksID, int alloc)
-{
- int i;
-
- /* recherche la wks dans la liste si elle existe */
- for (i=0; i<wks_count; i++)
- if (wks[i].wks == WksID)
- return i;
-
- if (!alloc) return -1;
-
- /* la wks n'existe pas => on fait de la place si yen a plus */
- if (wks_count == wks_size )
- {
- wks_size += GROW_SIZE_WKS;
- if (!wks)
- wks = new TEL_LIGHT_WKS[wks_size];
- else
-#if defined(__SUNPRO_CC) && (__SUNPRO_CC <= 0x530)
- wks = (TEL_LIGHT_WKS*)realloc(wks, wks_size*sizeof(TEL_LIGHT_WKS));
-#else
- wks = cmn_resizemem<TEL_LIGHT_WKS>(wks, wks_size);
-#endif
-
- if (!wks)
- return -1;
- }
-
- wks[wks_count].wks = WksID;
- wks[wks_count].lights = NULL;
- wks[wks_count].lights_size = 0;
- wks[wks_count].lights_count = 0;
-
- return wks_count++;
-}
-
-/*-----------------------------------------------------------------*/
-/*
-* recherche une lampe d'une wks, creation d'une lampe si elle n'existe pas
-*/
-static int find_light(int WksIdx, Tint LightID, int alloc)
-{
- int i;
- TEL_LIGHT_DATA *lights;
-
-
- /* recherche la light dans la liste de la wks */
- lights = wks[WksIdx].lights;
- for (i=0; i<wks[WksIdx].lights_count; i++)
- if (lights[i].LightID == LightID)
- return i;
-
- if (!alloc) return -1;
-
- /* la lampe n'existe pas => on cree une lampe */
- if (wks[WksIdx].lights_count == wks[WksIdx].lights_size)
- {
- wks[WksIdx].lights_size += GROW_SIZE_LIGHT;
- if (!wks[WksIdx].lights)
- wks[WksIdx].lights = new TEL_LIGHT_DATA[wks[WksIdx].lights_size];
- else
- wks[WksIdx].lights =
-#if defined(__SUNPRO_CC) && (__SUNPRO_CC <= 0x530)
- (TEL_LIGHT_DATA*)realloc( wks[WksIdx].lights,
- wks[WksIdx].lights_size*sizeof(TEL_LIGHT_DATA) );
-#else
- cmn_resizemem<TEL_LIGHT_DATA>( wks[WksIdx].lights,
- wks[WksIdx].lights_size );
-#endif
- if (!wks[WksIdx].lights)
- return -1;
- }
-
- return wks[WksIdx].lights_count++;
-}
-
-
-/*----------------------------------------------------------------------*/
-/*
-* Fonctions publiques
-*/
-
-
-/*-----------------------------------------------------------------*/
-/*
-* Ajout d'une lumiere dans la Wks
-*/
-TStatus AddLight(Tint WksID, Tint LightID, tel_light light)
-{
- int wks_entry;
- int light_entry;
-
-#if DEBUG
- printf("AddLight %d dans wks %d [wds_count=%d]\n", LightID, WksID, wks_count);
-#endif
-
- /* obtient le numero de la liste de lights de la wks */
- wks_entry = find_wks(WksID, 1);
- if (wks_entry == -1) return TFailure;
-
- /* recherche le numero de la lampe si elle existe */
- light_entry = find_light(wks_entry, LightID, 1);
- if (light_entry == -1) return TFailure;
-
- /* met a jour la light */
- wks[wks_entry].lights[light_entry].LightID = LightID;
- wks[wks_entry].lights[light_entry].light = *light;
-
-#if DEBUG
- printf("ajout ok\n");
-#endif
- return TSuccess;
-}
-
-
-/*-----------------------------------------------------------------*/
-/*
-* Maj des lumieres de la Wks
-*/
-TStatus UpdateLight(Tint WksID)
-{
- int wks_entry;
- int i;
- int gl_lid;
-
-
-#if DEBUG
- printf("UpdateLight %d\n", WksID);
-#endif
-
- /* vire toutes les lights des le depart avant une re-init complete */
- for (i=GL_LIGHT0; i<=GL_LIGHT7; i++)
- glDisable(i);
- glLightModelfv(GL_LIGHT_MODEL_AMBIENT, default_amb);
-
- /* recherche la liste de light de la wks */
- wks_entry = find_wks(WksID, 0);
- if (wks_entry == -1) return TFailure;
-
-#if DEBUG
- printf("*** Update: nb = %d\n", wks[wks_entry].lights_count);
-#endif
-
- /* set les lights */
- gl_lid = GL_LIGHT0;
- for (i=0; i<wks[wks_entry].lights_count; i++)
- {
-#if DEBUG
- printf("binding light %d\n", i);
-#endif
- bind_light(&wks[wks_entry].lights[i].light, &gl_lid);
- }
-
- if (wks[wks_entry].lights_count > 0) LightOn();
-
-#if DEBUG
- printf("update ok\n");
-#endif
-
- return TSuccess;
-}
-
-
-/*-----------------------------------------------------------------*/
-/*
-* Remove une lumiere de la Wks
-*/
-TStatus RemoveLight(Tint WksID, Tint LightID)
-{
- int wks_entry;
- int light_entry;
-
-
- /* recherche de la wks */
- wks_entry = find_wks(WksID, 0);
- if (wks_entry == -1) return TFailure;
-
- /* recherche de la light */
- light_entry = find_light(wks_entry, LightID, 0);
- if (light_entry == -1) return TFailure;
-
- /* retire la light */
- memcpy(&wks[wks_entry].lights[light_entry],
- &wks[wks_entry].lights[light_entry+1],
- (wks[wks_entry].lights_count - light_entry - 1)*sizeof(TEL_LIGHT_DATA));
- wks[wks_entry].lights_count--;
-
-#if DEBUG
- printf("RemoveLight %d dans wks %d [wds_count=%d]\n", LightID, WksID, wks_count);
-#endif
-
- return TSuccess;
-}
-
-
-/*-----------------------------------------------------------------*/
-/*
-* Remove des lumieres de la Wks
-*/
-TStatus RemoveWksLight(Tint WksID)
-{
- int wks_entry;
-
- /* recherche de la wks */
- wks_entry = find_wks(WksID, 0);
- if (wks_entry == -1) return TFailure;
-
- /* destruction de toute la wks */
- free(wks[wks_entry].lights);
- memcpy(&wks[wks_entry],
- &wks[wks_entry+1],
- (wks_count - wks_entry - 1)*sizeof(TEL_LIGHT_WKS));
- wks_count--;
-
- return TSuccess;
-}
-
-
-/*-----------------------------------------------------------------*/
-/*
-* Reset de toutes les lights d'une Wks
-*/
-TStatus ResetWksLight(Tint WksID)
-{
- int wks_entry;
-
- /* recherche de la wks */
- wks_entry = find_wks(WksID, 0);
- if (wks_entry == -1) return TFailure;
-
- /* destruction de toutes les lights */
- wks[wks_entry].lights_count = 0;
-
- return TSuccess;
-}
-
-
-/*-----------------------------------------------------------------*/
-/*
-* Enable des lights
-*/
-void LightOn(void)
-{
-#ifdef PRINT_DEBUG
- if(IsLightOn())
- printf("LightOn(): lighting already enabled!");
- else
- printf("LightOn() succeeded");
-#endif
- glEnable(GL_LIGHTING);
-}
-
-
-/*-----------------------------------------------------------------*/
-/*
-* Disable des lights
-*/
-void LightOff(void)
-{
-#ifdef PRINT_DEBUG
- if(!IsLightOn())
- printf("LightOff(): lighting already disabled!");
- else
- printf("LightOff() succeeded");
-#endif
- glDisable(GL_LIGHTING);
-}
-/*-----------------------------------------------------------------*/
-
-/*
-* IsEnable des lights
-*/
-
-GLboolean IsLightOn(void)
-{
- return glIsEnabled(GL_LIGHTING);
-}
-/*-----------------------------------------------------------------*/
projects / occt.git / blobdiff