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/* glschool_gl.c, Copyright (c) 2005-2012 David C. Lambert <dcl@panix.com>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*/
#include "sphere.h"
#include "glschool_gl.h"
#include "sphere.h"
#include "tube.h"
void
glschool_drawGoal(double *goal, GLuint goalList)
{
glColor3f(1.0, 0.0, 0.0);
glPushMatrix();
{
glTranslatef(goal[0], goal[1], goal[2]);
glColor3f(1.0, 0.0, 0.0);
glCallList(goalList);
}
glPopMatrix();
}
int
glschool_drawBoundingBox(BBox *bbox, Bool wire)
{
int polys = 0;
double xMin = BBOX_XMIN(bbox);
double yMin = BBOX_YMIN(bbox);
double zMin = BBOX_ZMIN(bbox);
double xMax = BBOX_XMAX(bbox);
double yMax = BBOX_YMAX(bbox);
double zMax = BBOX_ZMAX(bbox);
glFrontFace(GL_CCW);
if (wire) glLineWidth(5.0);
/* back */
glBegin(wire ? GL_LINE_LOOP : GL_QUADS);
glColor3f(0.0, 0.0, .15);
glVertex3f(xMin, yMin, zMin);
glVertex3f(xMax, yMin, zMin);
glVertex3f(xMax, yMax, zMin);
glVertex3f(xMin, yMax, zMin);
polys++;
glEnd();
/* left */
glBegin(wire ? GL_LINE_LOOP : GL_QUADS);
glColor3f(0.0, 0.0, .2);
glVertex3f(xMin, yMin, zMax);
glVertex3f(xMin, yMin, zMin);
glVertex3f(xMin, yMax, zMin);
glVertex3f(xMin, yMax, zMax);
polys++;
glEnd();
/* right */
glBegin(wire ? GL_LINE_LOOP : GL_QUADS);
glColor3f(0.0, 0.0, .2);
glVertex3f(xMax, yMin, zMin);
glVertex3f(xMax, yMin, zMax);
glVertex3f(xMax, yMax, zMax);
glVertex3f(xMax, yMax, zMin);
polys++;
glEnd();
/* top */
glBegin(wire ? GL_LINE_LOOP : GL_QUADS);
glColor3f(0.0, 0.0, .1);
glVertex3f(xMax, yMax, zMax);
glVertex3f(xMin, yMax, zMax);
glVertex3f(xMin, yMax, zMin);
glVertex3f(xMax, yMax, zMin);
polys++;
glEnd();
/* bottom */
glBegin(wire ? GL_LINE_LOOP : GL_QUADS);
glColor3f(0.0, 0.0, .3);
glVertex3f(xMin, yMin, zMax);
glVertex3f(xMax, yMin, zMax);
glVertex3f(xMax, yMin, zMin);
glVertex3f(xMin, yMin, zMin);
polys++;
glEnd();
if (wire) glLineWidth(1.0);
return polys;
}
int
glschool_createBBoxList(BBox *bbox, GLuint *bboxList, int wire)
{
int polys = 0;
*bboxList = glGenLists(1);
glNewList(*bboxList, GL_COMPILE);
polys = glschool_drawBoundingBox(bbox, wire);
glEndList();
return polys;
}
void
glschool_createDrawLists(BBox *bbox, GLuint *bboxList, GLuint *goalList, GLuint *fishList, int *fish_polys, int *box_polys, int wire)
{
int faces = 16;
*box_polys = 0;
*fish_polys = 0;
*box_polys += glschool_createBBoxList(bbox, bboxList, wire);
*box_polys = 0;
*fish_polys = 0;
*goalList = glGenLists(1);
glNewList(*goalList, GL_COMPILE);
glScalef (5, 5, 5);
*box_polys += unit_sphere (10, 10, wire);
glEndList();
*fishList = glGenLists(1);
glNewList(*fishList, GL_COMPILE);
*fish_polys += cone (0, 0, 0,
0, 0, 10,
2, 0,
faces, True, (faces <= 3), /* cap */
wire);
glTranslatef (0, 0, -0.3);
glScalef (2, 2, 2);
glRotatef (90, 1, 0, 0);
if (faces > 3)
*fish_polys += unit_sphere (faces, faces, wire);
glEndList();
}
void
glschool_initLights(void)
{
GLfloat amb[4] = {0.1, 0.1, 0.1, 1.0};
GLfloat dif[4] = {1.0, 1.0, 1.0, 1.0};
GLfloat spc[4] = {1.0, 1.0, 1.0, 1.0};
GLfloat pos[4] = {0.0, 50.0, -50.0, 1.0};
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glLightfv(GL_LIGHT0, GL_POSITION, pos);
glLightfv(GL_LIGHT0, GL_AMBIENT, amb);
glLightfv(GL_LIGHT0, GL_DIFFUSE, dif);
glLightfv(GL_LIGHT0, GL_SPECULAR, spc);
glEnable(GL_LIGHT0);
glEnable(GL_LIGHTING);
}
void
glschool_initFog(void)
{
GLfloat fog[4] = {0.0, 0.0, 0.15, 1.0};
glEnable(GL_FOG);
glFogi(GL_FOG_MODE, GL_EXP2);
glFogfv(GL_FOG_COLOR, fog);
glFogf(GL_FOG_DENSITY, .0025);
glFogf(GL_FOG_START, -100);
}
void
glschool_initGLEnv(Bool doFog)
{
GLfloat spc[4] = {1.0, 1.0, 1.0, 1.0};
glClearDepth(1.0);
glDepthFunc(GL_LESS);
glEnable(GL_COLOR_MATERIAL);
glMateriali(GL_FRONT, GL_SHININESS, 128);
glMaterialfv(GL_FRONT, GL_SPECULAR, spc);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, spc);
glEnable(GL_NORMALIZE);
glEnable(GL_DEPTH_TEST);
glShadeModel(GL_SMOOTH);
glEnable(GL_CULL_FACE);
glschool_initLights();
if (doFog) glschool_initFog();
}
void
glschool_reshape(int width, int height)
{
GLfloat h = (GLfloat) width / (GLfloat) height;
glViewport (0, 0, (GLint) width, (GLint) height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60.0, h, 0.1, 451.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void
glschool_getColorVect(XColor *colors, int index, double *colorVect)
{
colorVect[0] = colors[index].red / 65535.0;
colorVect[1] = colors[index].green / 65535.0;
colorVect[2] = colors[index].blue / 65535.0;
}
void
glschool_drawSchool(XColor *colors, School *s,
GLuint bboxList, GLuint goalList, GLuint fishList,
int rotCounter, Bool drawGoal_p, Bool drawBBox_p,
int fish_polys, int box_polys, unsigned long *polys)
{
double xVect[3];
double colorVect[3];
int i = 0;
double rotTheta = 0.0;
double colTheta = 0.0;
Fish *f = (Fish *)0;
int nFish = SCHOOL_NFISH(s);
Fish *theFishes = SCHOOL_FISHES(s);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
if (drawBBox_p) {
glDisable(GL_LIGHTING);
glCallList(bboxList);
glEnable(GL_LIGHTING);
*polys += box_polys;
}
if (drawGoal_p) glschool_drawGoal(SCHOOL_GOAL(s), goalList);
for(i = 0, f = theFishes; i < nFish; i++, f++) {
colTheta = glschool_computeNormalAndThetaToPlusZ(FISH_AVGVEL(f), xVect);
rotTheta = glschool_computeNormalAndThetaToPlusZ(FISH_VEL(f), xVect);
if (FISH_IAVGVEL(f,2) < 0.0) colTheta = 180.0 - colTheta;
if (FISH_VZ(f) < 0.0) rotTheta = 180.0 - rotTheta;
glschool_getColorVect(colors, (int)(colTheta+240)%360, colorVect);
glColor3f(colorVect[0], colorVect[1], colorVect[2]);
glPushMatrix();
{
glTranslatef(FISH_X(f), FISH_Y(f), FISH_Z(f));
glRotatef(180.0+rotTheta, xVect[0], xVect[1], xVect[2]);
glCallList(fishList);
*polys += fish_polys;
}
glPopMatrix();
}
glFinish();
}
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