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// The contents of this file are subject to the BOINC Public License
// Version 1.0 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at
// http://boinc.berkeley.edu/license_1.0.txt
//
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
// License for the specific language governing rights and limitations
// under the License.
//
// The Original Code is the Berkeley Open Infrastructure for Network Computing.
//
// The Initial Developer of the Original Code is the SETI@home project.
// Portions created by the SETI@home project are Copyright (C) 2002
// University of California at Berkeley. All Rights Reserved.
//
// Contributor(s):
//
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#ifdef _WIN32
#include <windows.h>
/* the old way... Use the defines below which should be set in
* config.h
* #include "gl/gl.h"
* #include "gl/glu.h"
* #include "gl/glut.h"
*/
#endif
#ifdef HAVE_GL_H
#include "gl.h"
#elif defined(HAVE_GL_GL_H)
#include <GL/gl.h>
#elif defined(HAVE_OPENGL_GL_H)
#include <OpenGL/gl.h>
#endif
#ifdef HAVE_GLU_H
#include "glu.h"
#elif defined(HAVE_GL_GLU_H)
#include <GL/glu.h>
#elif defined(HAVE_OPENGL_GLU_H)
#include <OpenGL/glu.h>
#endif
#ifdef HAVE_GLUT_H
#include "glut.h"
#elif defined(HAVE_GL_GLUT_H)
#include <GL/glut.h>
#elif defined(HAVE_OPENGL_GLUT_H)
#include <OpenGL/glut.h>
#elif defined(HAVE_GLUT_GLUT_H)
#include <GLUT/glut.h>
#endif
// the old way
// #ifdef __APPLE_CC__
// #include <OpenGL/gl.h>
// #include <GLUT/glut.h>
// #endif
// #ifdef unix
// #include <GL/gl.h>
// #include <GL/glu.h>
// #include <GL/glut.h>
// #endif
#include "gutil.h"
GLfloat mat_diffuse[] = {0.7, 0.5, 1.0, 0.4};
GLfloat mat_specular[] = {1.0, 1.0, 1.0, 1.0};
GLfloat mat_shininess[] = {40.0};
void mode_shaded(GLfloat* color) {
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glShadeModel (GL_SMOOTH);
glDepthMask(GL_TRUE);
glMaterialfv(GL_FRONT, GL_DIFFUSE, color);
glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
}
void mode_texture() {
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
glDisable(GL_LIGHTING);
glDisable(GL_LIGHT0);
}
void mode_unshaded() {
glEnable(GL_DEPTH_TEST);
glDisable(GL_LIGHTING);
glDisable(GL_LIGHT0);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glShadeModel (GL_SMOOTH);
glDepthMask(GL_TRUE);
}
void mode_ortho()
{
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluOrtho2D(0,1,0,1);
//glScalef(1, -1, 1);
//glTranslatef(0, -1, 0);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
gluLookAt(0.0,0.0,1.0, // eye position
0,0,0, // where we're looking
0.0, 1.0, 0.); // up is in positive Y direction
}
void ortho_done()
{
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
bool get_matrix(double src[16])
{
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glGetDoublev(GL_MODELVIEW_MATRIX,src);
glPopMatrix();
return true;
}
bool get_projection(double src[16])
{
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glGetDoublev(GL_PROJECTION_MATRIX,src);
glPopMatrix();
return true;
}
bool get_viewport(int view[4])
{
glMatrixMode(GL_MODELVIEW);
glGetIntegerv(GL_VIEWPORT,view);
return true;
}
void get_2d_positions(float p1,float p2,float p3,
double model[16], double proj[16], int viewport[4], double proj_pos[3])
{
gluProject(p1,p2,p3,model,proj,viewport,&proj_pos[0],&proj_pos[1],&proj_pos[2]);
}
bool get_matrix_invert(float src[16])
{
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glGetFloatv(GL_MODELVIEW_MATRIX,src);
glPopMatrix();
float tmp[12]; /* temp array for pairs */
float dst[16]; /* array of destination matrix */
float det; /* determinant */
int i;
/* calculate pairs for first 8 elements (cofactors) */
tmp[0] = src[10] * src[15];
tmp[1] = src[11] * src[14];
tmp[2] = src[9] * src[15];
tmp[3] = src[11] * src[13];
tmp[4] = src[9] * src[14];
tmp[5] = src[10] * src[13];
tmp[6] = src[8] * src[15];
tmp[7] = src[11] * src[12];
tmp[8] = src[8] * src[14];
tmp[9] = src[10] * src[12];
tmp[10] = src[8] * src[13];
tmp[11] = src[9] * src[12];
/* calculate first 8 elements (cofactors) */
dst[0] = tmp[0]*src[5] + tmp[3]*src[6] + tmp[4]*src[7];
dst[0] -= tmp[1]*src[5] + tmp[2]*src[6] + tmp[5]*src[7];
dst[1] = tmp[1]*src[4] + tmp[6]*src[6] + tmp[9]*src[7];
dst[1] -= tmp[0]*src[4] + tmp[7]*src[6] + tmp[8]*src[7];
dst[2] = tmp[2]*src[4] + tmp[7]*src[5] + tmp[10]*src[7];
dst[2] -= tmp[3]*src[4] + tmp[6]*src[5] + tmp[11]*src[7];
dst[3] = tmp[5]*src[4] + tmp[8]*src[5] + tmp[11]*src[6];
dst[3] -= tmp[4]*src[4] + tmp[9]*src[5] + tmp[10]*src[6];
dst[4] = tmp[1]*src[1] + tmp[2]*src[2] + tmp[5]*src[3];
dst[4] -= tmp[0]*src[1] + tmp[3]*src[2] + tmp[4]*src[3];
dst[5] = tmp[0]*src[0] + tmp[7]*src[2] + tmp[8]*src[3];
dst[5] -= tmp[1]*src[0] + tmp[6]*src[2] + tmp[9]*src[3];
dst[6] = tmp[3]*src[0] + tmp[6]*src[1] + tmp[11]*src[3];
dst[6] -= tmp[2]*src[0] + tmp[7]*src[1] + tmp[10]*src[3];
dst[7] = tmp[4]*src[0] + tmp[9]*src[1] + tmp[10]*src[2];
dst[7] -= tmp[5]*src[0] + tmp[8]*src[1] + tmp[11]*src[2];
/* calculate pairs for second 8 elements (cofactors) */
tmp[0] = src[2]*src[7];
tmp[1] = src[3]*src[6];
tmp[2] = src[1]*src[7];
tmp[3] = src[3]*src[5];
tmp[4] = src[1]*src[6];
tmp[5] = src[2]*src[5];
tmp[6] = src[0]*src[7];
tmp[7] = src[3]*src[4];
tmp[8] = src[0]*src[6];
tmp[9] = src[2]*src[4];
tmp[10] = src[0]*src[5];
tmp[11] = src[1]*src[4];
/* calculate second 8 elements (cofactors) */
dst[8] = tmp[0]*src[13] + tmp[3]*src[14] + tmp[4]*src[15];
dst[8] -= tmp[1]*src[13] + tmp[2]*src[14] + tmp[5]*src[15];
dst[9] = tmp[1]*src[12] + tmp[6]*src[14] + tmp[9]*src[15];
dst[9] -= tmp[0]*src[12] + tmp[7]*src[14] + tmp[8]*src[15];
dst[10] = tmp[2]*src[12] + tmp[7]*src[13] + tmp[10]*src[15];
dst[10]-= tmp[3]*src[12] + tmp[6]*src[13] + tmp[11]*src[15];
dst[11] = tmp[5]*src[12] + tmp[8]*src[13] + tmp[11]*src[14];
dst[11]-= tmp[4]*src[12] + tmp[9]*src[13] + tmp[10]*src[14];
dst[12] = tmp[2]*src[10] + tmp[5]*src[11] + tmp[1]*src[9];
dst[12]-= tmp[4]*src[11] + tmp[0]*src[9] + tmp[3]*src[10];
dst[13] = tmp[8]*src[11] + tmp[0]*src[8] + tmp[7]*src[10];
dst[13]-= tmp[6]*src[10] + tmp[9]*src[11] + tmp[1]*src[8];
dst[14] = tmp[6]*src[9] + tmp[11]*src[11] + tmp[3]*src[8];
dst[14]-= tmp[10]*src[11] + tmp[2]*src[8] + tmp[7]*src[9];
dst[15] = tmp[10]*src[10] + tmp[4]*src[8] + tmp[9]*src[9];
dst[15]-= tmp[8]*src[9] + tmp[11]*src[10] + tmp[5]*src[8];
/* calculate determinant */
det=src[0]*dst[0]+src[1]*dst[1]+src[2]*dst[2]+src[3]*dst[3];
/* calculate matrix inverse */
if(det == 0) return false;
det = 1.0f/det;
for (i = 0; i < 16; i++) {
dst[i] *= det;
}
for (i = 0; i < 4; i++) {
src[i*4] = dst[i*4];
src[i*4+1] = dst[i*4+1];
src[i*4+2] = dst[i*4+2];
src[i*4+3] = dst[i*4+3];
}
/*
char buf[512];
sprintf(buf,"%f,%f,%f,%f\n%f,%f,%f,%f\n%f,%f,%f,%f\n%f,%f,%f,%f\n",
dst[0],dst[1],dst[2],dst[3],
dst[4],dst[5],dst[6],dst[7],
dst[8],dst[9],dst[10],dst[11],
dst[12],dst[13],dst[14],dst[15]);
fprintf(stderr, "%s: modelview\n", buf);
MessageBox(NULL,buf,"F",0);
*/
return true;
}
void mode_lines() {
glEnable(GL_BLEND);
glDisable(GL_LIGHTING);
glDisable(GL_LIGHT0);
//glBlendFunc(GL_SRC_ALPHA, GL_ONE);
//glDepthMask(GL_TRUE);
//glEnable(GL_LINE_SMOOTH);
//glHint(GL_LINE_SMOOTH, GL_NICEST);
//glDisable(GL_DEPTH_TEST);
}
static double HuetoRGB(double m1, double m2, double h ) {
if( h < 0 ) h += 1.0;
if( h > 1 ) h -= 1.0;
if( 6.0*h < 1 ) return (m1+(m2-m1)*h*6.0);
if( 2.0*h < 1 ) return m2;
if( 3.0*h < 2.0 ) return (m1+(m2-m1)*((2.0/3.0)-h)*6.0);
return m1;
}
void HLStoRGB( double H, double L, double S, COLOR& c) {
double m1, m2;
if(S==0) {
c.r=c.g=c.b=L;
} else {
if(L <=0.5)
m2 = L*(1.0+S);
else
m2 = L+S-L*S;
m1 = 2.0*L-m2;
c.r = HuetoRGB(m1,m2,H+1.0/3.0);
c.g = HuetoRGB(m1,m2,H);
c.b = HuetoRGB(m1,m2,H-1.0/3.0);
}
}
float frand() {
return rand()/(float)RAND_MAX;
}
void drawSphere(GLfloat* pos, GLfloat rad) {
GLUquadricObj* x = gluNewQuadric();
glPushMatrix();
glTranslatef(pos[0], pos[1], pos[2]);
gluSphere(x, rad, 20, 20);
gluDeleteQuadric(x);
glPopMatrix();
}
void drawCylinder(bool vertical, GLfloat* pos, GLfloat len, GLfloat rad) {
GLUquadricObj* x = gluNewQuadric();
glPushMatrix();
glTranslatef(pos[0], pos[1], pos[2]);
if (vertical) {
glRotated(-90., 1., 0., 0.);
} else {
glRotated(90., 0., 1., 0.);
}
gluCylinder(x, rad, rad, len, 20, 1);
gluDeleteQuadric(x);
glPopMatrix();
}
#define STROKE_SCALE 120
// GLUT stroke characters are about 120 units high
GLfloat text_width(char* text) {
GLfloat sum = 0;
char* p;
for (p=text; *p; p++) {
sum += glutStrokeWidth(GLUT_STROKE_ROMAN, *p);
}
return sum/STROKE_SCALE;
}
static void draw_text_line_aux(char *text) {
char *p;
for (p = text; *p; p++) {
glutStrokeCharacter(GLUT_STROKE_ROMAN, *p);
}
}
static void draw_text_start(GLfloat* pos, GLfloat char_height, GLfloat line_width) {
glLineWidth(line_width);
glPushMatrix();
glTranslatef(pos[0], pos[1], pos[2]);
float w = char_height/STROKE_SCALE;
glScalef(w, w, w);
}
static void draw_text_end() {
glPopMatrix();
}
// draw a line of text in the XY plane at the given starting position,
// character height, and line width.
//
void draw_text_simple(char* text,float line_width,float char_height)
{
glLineWidth(line_width);
float w = char_height/STROKE_SCALE;
glScalef(w, w, w);
draw_text_line_aux(text);
}
void draw_text_line(
GLfloat* _pos, GLfloat char_height, GLfloat line_width, char *text,
int justify
) {
GLfloat pos[3];
GLfloat w;
memcpy(pos, _pos, sizeof(pos));
switch(justify) {
case TEXT_LEFT:
break;
case TEXT_CENTER:
w = text_width(text);
pos[0] -= w/2;
break;
case TEXT_RIGHT:
w = text_width(text);
pos[0] -= w;
break;
}
draw_text_start(pos, char_height, line_width);
draw_text_line_aux(text);
draw_text_end();
}
// draw rotated text
void draw_rotated_text(
GLfloat* pos, GLfloat height, GLfloat width, GLfloat spacing, char *text,
GLfloat rotation, GLfloat* rotation_vector)
{
draw_text_start(pos, height, width);
glRotatef(rotation,rotation_vector[0],rotation_vector[1],rotation_vector[2]);
draw_text_line_aux(text);
draw_text_end();
}
// draw multiple lines of text
//
void draw_text(
GLfloat* _pos, GLfloat char_height, GLfloat line_width,
GLfloat line_spacing, char* text
) {
char* q, *p;
char buf[4096];
GLfloat pos[3];
memcpy(pos, _pos, sizeof(pos));
strcpy(buf, text);
p = buf;
while (*p) {
q = strchr(p, '\n');
if (q) *q = 0;
draw_text_start(pos, char_height, line_width);
draw_text_line_aux(p);
draw_text_end();
pos[1] -= line_spacing;
if (!q) break;
p = q+1;
}
}
void draw_text_new(
GLfloat* _pos, GLfloat char_height, GLfloat line_width,
GLfloat line_spacing, char* text)
{
char* q, *p;
char buf[4096];
GLfloat pos[3];
memcpy(pos, _pos, sizeof(pos));
strcpy(buf, text);
p = buf;
while (*p) {
q = strchr(p, '\n');
if (q) *q = 0;
glRasterPos3d(pos[0],pos[1],pos[2]);
print_text(listBase[0], p);
pos[1] -= line_spacing;
if (!q) break;
p = q+1;
}
}
// draw a rectangle of the given color in the XY plane
// and draw the given test in it
//
void draw_text_panel(
GLfloat* _pos, GLfloat* size, GLfloat margin, COLOR color,
GLfloat char_height, GLfloat line_width, GLfloat line_spacing,
char* text
) {
GLfloat pos0[3], pos1[3], pos2[3], pos3[3];
memcpy(pos0, _pos, sizeof(pos0));
memcpy(pos1, _pos, sizeof(pos0));
pos1[0] += size[0];
memcpy(pos2, pos1, sizeof(pos0));
pos2[1] += size[1];
memcpy(pos3, pos2, sizeof(pos0));
pos3[0] -= size[0];
mode_unshaded();
glColor4fv(&color.r);
glBegin(GL_QUADS);
glVertex3fv(pos0);
glVertex3fv(pos1);
glVertex3fv(pos2);
glVertex3fv(pos3);
// draw flanges
//
color.r /= 2;
color.g /= 2;
color.b /= 2;
glColor4fv(&color.r);
GLfloat posa0[3], posa1[3], posa2[3], posa3[3];
memcpy(posa0, pos0, sizeof(pos0));
memcpy(posa1, pos1, sizeof(pos0));
memcpy(posa2, pos2, sizeof(pos0));
memcpy(posa3, pos3, sizeof(pos0));
posa0[2] -= .2;
posa1[2] -= .2;
posa2[2] -= .2;
posa3[2] -= .2;
glVertex3fv(pos0);
glVertex3fv(pos1);
glVertex3fv(posa1);
glVertex3fv(posa0);
glVertex3fv(pos1);
glVertex3fv(pos2);
glVertex3fv(posa2);
glVertex3fv(posa1);
glVertex3fv(pos2);
glVertex3fv(pos3);
glVertex3fv(posa3);
glVertex3fv(posa2);
glVertex3fv(pos3);
glVertex3fv(pos0);
glVertex3fv(posa0);
glVertex3fv(posa3);
glEnd();
pos3[0] += margin;
pos3[1] -= (margin+char_height);
pos3[2] += 0.01;
glColor3f(1, 1, 1);
draw_text(pos3, char_height, line_width, line_spacing, text);
}
PROGRESS::PROGRESS(
GLfloat* p, GLfloat l, GLfloat r, GLfloat in, GLfloat* c, GLfloat* ic
) {
memcpy(pos, p, sizeof(pos));
len = l;
rad = r;
inner_rad = in;
memcpy(color, c, sizeof(color));
memcpy(inner_color, ic, sizeof(inner_color));
}
void PROGRESS::draw(float x) {
mode_shaded(inner_color);
drawCylinder(false, pos, x*len, inner_rad);
mode_shaded(color);
drawCylinder(false, pos, len, rad);
}
GRAPH_2D::GRAPH_2D(float* p, float* s, float* c, float* tc) {
memcpy(pos, p, sizeof(pos));
memcpy(size, s, sizeof(size));
memcpy(color, c, sizeof(color));
memcpy(tick_color, tc, sizeof(tick_color));
}
float yvec[] = {0., 1., 0.};
float xvec[] = {1., 0., 0.};
float xvecneg[] = {-1., 0., 0.};
float zvec[] = {0, 0, 1};
// draw horizontal plate from i to i+1, with height data[i]
//
void GRAPH_2D::draw_x(int i) {
GLfloat pt[3];
double r1 = i/(double)len;
double r2 = (i+1)/(double)len;
glNormal3fv(yvec);
pt[0] = pos[0] + r1*size[0];
pt[1] = pos[1] + data[i]*size[1]/dmax;
pt[2] = pos[2];
glVertex3fv(pt);
pt[0] = pos[0] + r2*size[0];
glVertex3fv(pt);
pt[2] = pos[2] + size[2];
glVertex3fv(pt);
pt[0] = pos[0] + r1*size[0];
glVertex3fv(pt);
glNormal3fv(zvec);
pt[0] = pos[0] + r1*size[0];
pt[1] = pos[1] + data[i]*size[1]/dmax;
pt[2] = pos[2]+size[2];
glVertex3fv(pt);
pt[1] = pos[1];
glVertex3fv(pt);
pt[0] = pos[0] + r2*size[0];
glVertex3fv(pt);
pt[1] = pos[1] + data[i]*size[1]/dmax;
glVertex3fv(pt);
}
// draw vertical plate at position i, with height from data[i-1] to data[i]
//
void GRAPH_2D::draw_y(int i) {
GLfloat pt[3];
double r1 = i/(double)len;
(data[i]>data[i-1])?glNormal3fv(xvecneg):glNormal3fv(xvec);
pt[0] = pos[0] + r1*size[0];
pt[1] = pos[1] + data[i-1]*size[1]/dmax;
pt[2] = pos[2];
glVertex3fv(pt);
pt[1] = pos[1] + data[i]*size[1]/dmax;
glVertex3fv(pt);
pt[2] = pos[2] + size[2];
glVertex3fv(pt);
pt[1] = pos[1] + data[i-1]*size[1]/dmax;
glVertex3fv(pt);
}
void GRAPH_2D::draw(float* d, int ln) {
int i;
data = d;
len = ln;
dmax = 0;
for (i=0; i<len; i++) {
if (data[i] > dmax) dmax = data[i];
}
mode_shaded(color);
glBegin(GL_QUADS);
draw_x(0);
for (i=1; i<len-1; i++) {
draw_y(i);
draw_x(i);
}
draw_x(len-1);
glEnd();
}
void GRAPH_2D::add_tick(float x, float yfrac) {
}
// read a PPM file
// to generate PPM from JPEG:
// mogrify -format ppm foo.jpg
// or xv foo.jpg; right click on image, choose PPM
//
int read_ppm_file(char* name, int& w, int& h, unsigned char** arrayp) {
FILE* f;
char buf[256];
char img_type;
unsigned char* array;
int i;
f = fopen(name, "rb");
if (!f) return -1;
do {fgets(buf, 256, f);} while (buf[0] == '#');
if (buf[0] != 'P') {
return -1;
}
img_type = buf[1];
do {fgets(buf, 256, f);} while (buf[0] == '#');
sscanf(buf, "%d %d", &w, &h);
do {fgets(buf, 256, f);} while (buf[0] == '#');
array = (unsigned char*)malloc(w*h*3);
switch(img_type) { // TODO: pad image dimension to power of 2
case '3':
for (i=0; i<w*h*3; i++) {
fscanf(f, "%d", array+i);
}
case '6':
fread(array, 3, w*h, f);
break;
}
*arrayp = array;
return 0;
}
unsigned int texture_id;
int init_texture(char* filename) {
unsigned char* pixels;
int width, height, retVal;
int err;
retVal = read_ppm_file(filename, width, height, &pixels);
if (retVal) return retVal;
glGenTextures(1, &texture_id);
err = glGetError();
if (err) return err;
glBindTexture(GL_TEXTURE_2D, texture_id);
err = glGetError();
if (err) return err;
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER, GL_LINEAR);
err = glGetError();
if (err) return err;
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER, GL_LINEAR);
err = glGetError();
if (err) return err;
//ASSERT(0);
glTexImage2D(
GL_TEXTURE_2D,
0,
3,
//0,
//0,
width,
height,
0,
GL_RGB,
GL_UNSIGNED_BYTE,
pixels // dimension of PPM file MUST be power of 2
);
err = glGetError();
if (err) {
fprintf(stderr, "glTexImage2D returned error # %d: %s\n", err, gluErrorString(err));
return err;
}
return 0;
}
struct Vertex
{
float tu, tv;
float x, y, z;
};
Vertex g_quadVertices[] =
{
{ 0.0f,0.0f, -1.0f,-1.0f, 0.0f },
{ 1.0f,0.0f, 1.0f,-1.0f, 0.0f },
{ 1.0f,1.0f, 1.0f, 1.0f, 0.0f },
{ 0.0f,1.0f, -1.0f, 1.0f, 0.0f }
};
float white[4] = {1., 1., 1., 1.};
void draw_texture(float* p, float* size) {
float pos[3];
memcpy(pos, p, sizeof(pos));
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, texture_id);
mode_shaded(white);
#if 1
glBegin(GL_QUADS);
glTexCoord2f(0., 1.);
glVertex3fv(pos);
pos[0] += size[0];
glTexCoord2f(1., 1.);
glVertex3fv(pos);
pos[1] += size[1];
glTexCoord2f(1., 0.);
glVertex3fv(pos);
pos[0] -= size[0];
glTexCoord2f(0., 0.);
glVertex3fv(pos);
glEnd();
#else
glInterleavedArrays( GL_T2F_V3F, 0, g_quadVertices );
glDrawArrays( GL_QUADS, 0, 4 );
#endif
glDisable(GL_TEXTURE_2D);
}
//star drawing functions -<oliver wang>-
#define PI 3.14159265358979323846264
//pointer to the begining of the list
Star* stars = new Star;
//makes a list of stars that lie on cocentric circles (inefficient, most will be out of sight)
void build_stars(int size, float speed)
{
int i=0;
Star* tmpStar = stars;
float fov=45.0f;
while(i<size)
{
float z = (float)(rand()%2000-1000);
float alpha = 2.0*PI*(float)((rand()%359)/359.0) ;
float beta = asin(z/1000.0f);
float x = 1000.0f * cos(beta) * cos(alpha);
float y = 1000.0f * cos(beta) * sin(alpha);
tmpStar->x=x;
tmpStar->y=y;
tmpStar->z=z;
float v = (float)((rand()%1000)/1000.0f);
tmpStar->v=v;
tmpStar->next = new Star;
tmpStar=tmpStar->next;
i++;
}
tmpStar->next=NULL;
tmpStar=NULL;
}
//moves stars towards the eye vector, and replaces ones that go behind z=0
float dotProd(float a, float b, float c, float x, float y, float z)
{
return(a*x+b*y+c*z);
}
void update_stars(int number, float speed)
{
float modelview[16];
float dist;
float eye[3];
float camera[3];
Star* tmpStar = stars;
if(get_matrix_invert(modelview)==false)
fprintf(stderr,"ERROR: 0 determinant in modelview matrix");
eye[0]=modelview[2];
eye[1]=modelview[6];
eye[2]=modelview[10];
camera[0]=modelview[2];
camera[1]=modelview[6];
camera[2]=modelview[10];
while(tmpStar!=NULL)
{
dist=sqrt((camera[0]-tmpStar->x)*(camera[0]-tmpStar->x) +
(camera[1]-tmpStar->y)*(camera[1]-tmpStar->y) +
(camera[2]-tmpStar->z)*(camera[2]-tmpStar->z));
if(dotProd(eye[0],eye[1],eye[2],tmpStar->x,tmpStar->y,tmpStar->z)>0) // behind camera
{
replaceStar(tmpStar);
continue;
}
tmpStar->x+=(eye[0])*tmpStar->v*speed;
tmpStar->y+=(eye[1])*tmpStar->v*speed;
tmpStar->z+=(eye[2])*tmpStar->v*speed;
//grow objects as the approach you
if(dist>900) glPointSize(1.0f);
else if(dist>600) glPointSize(2.0f);
//else if(dist>30) glPointSize(3.0f);
GLfloat mat_emission[] = {1, 1, 1, 1};
glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, mat_emission );
glColor3f(1.0, 1.0, 1.0);
glBegin(GL_POINTS);
glVertex3f(tmpStar->x,tmpStar->y,tmpStar->z);
glEnd();
GLfloat no_mat[] = { 0.0, 0.0, 0.0, 1.0 };
glMaterialfv( GL_FRONT_AND_BACK, GL_EMISSION, no_mat );
tmpStar=tmpStar->next;
}
}
void replaceStar(Star* star)
{
float z = (float)(rand()%2000-1000);
float alpha = 2.0*PI*(float)((rand()%359)/359.0) ;
float beta = asin(z/1000.0f);
float x = 1000.0f * cos(beta) * cos(alpha);
float y = 1000.0f * cos(beta) * sin(alpha);
star->x=x;
star->y=y;
star->z=z;
star->x=x;
float v = (float)((rand()%1000)/1000.0f);
star->v=v;
}
//jpg texture support
//this is the array that will contain pointers to texture pixel data
UINT g_Texture[MAX_TEXTURES];
void DecodeJPG(jpeg_decompress_struct* cinfo, tImageJPG *pImageData)
{
jpeg_read_header(cinfo, TRUE);
jpeg_start_decompress(cinfo);
pImageData->rowSpan = cinfo->image_width * cinfo->num_components;
pImageData->sizeX = cinfo->image_width;
pImageData->sizeY = cinfo->image_height;
pImageData->data = new unsigned char[pImageData->rowSpan * pImageData->sizeY];
unsigned char** rowPtr = new unsigned char*[pImageData->sizeY];
for (int i = 0; i < pImageData->sizeY; i++)
rowPtr[i] = &(pImageData->data[i*pImageData->rowSpan]);
int rowsRead = 0;
while (cinfo->output_scanline < cinfo->output_height)
{
rowsRead += jpeg_read_scanlines(cinfo, &rowPtr[rowsRead], cinfo->output_height - rowsRead);
}
delete [] rowPtr;
jpeg_finish_decompress(cinfo);
}
tImageJPG *LoadJPG(const char *filename)
{
struct jpeg_decompress_struct cinfo;
tImageJPG *pImageData = NULL;
FILE *pFile;
if((pFile = fopen(filename, "rb")) == NULL)
{
MessageBox(NULL, "Unable to load JPG File!", "Error", MB_OK);
return NULL;
}
jpeg_error_mgr jerr;
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_decompress(&cinfo);
jpeg_stdio_src(&cinfo, pFile);
pImageData = (tImageJPG*)malloc(sizeof(tImageJPG));
DecodeJPG(&cinfo, pImageData);
jpeg_destroy_decompress(&cinfo);
fclose(pFile);
return pImageData;
}
bool CreateTextureJPG(UINT textureArray[], LPSTR strFileName, int textureID)
{
if(!strFileName) return false;
tImageJPG *pImage = LoadJPG(strFileName); // Load the image and store the data
if(pImage == NULL)
exit(0);
glGenTextures(1, &textureArray[textureID]);
glBindTexture(GL_TEXTURE_2D, textureArray[textureID]);
gluBuild2DMipmaps(GL_TEXTURE_2D, 3, pImage->sizeX, pImage->sizeY, GL_RGB, GL_UNSIGNED_BYTE, pImage->data);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR_MIPMAP_LINEAR);
if (pImage)
{
if (pImage->data)
{
free(pImage->data);
}
free(pImage);
}
return true;
}
bool CreateTextureBMP(UINT textureArray[], LPSTR strFileName, int textureID)
{
DIB_BITMAP image;
if(image.loadBMP(strFileName) == false)
return false;
glGenTextures(1, &textureArray[textureID]);
glBindTexture(GL_TEXTURE_2D, textureArray[textureID]);
gluBuild2DMipmaps(GL_TEXTURE_2D, image.get_channels(), image.get_width(),
image.get_height(), GL_BGR_EXT, GL_UNSIGNED_BYTE,
image.getLinePtr(0));
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR_MIPMAP_LINEAR);
return true;
}
bool CreateTexturePPM(UINT textureArray[], LPSTR strFileName, int textureID)
{
unsigned char* pixels;
int width, height;
if(read_ppm_file(strFileName, width, height, &pixels)==-1) return false;
glGenTextures(1, &textureArray[textureID]);
glBindTexture(GL_TEXTURE_2D, textureArray[textureID]);
gluBuild2DMipmaps(GL_TEXTURE_2D,3,width,height,GL_RGB,GL_UNSIGNED_BYTE,pixels);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR_MIPMAP_LINEAR);
return true;
}
bool CreateTextureTGA(UINT textureArray[], LPSTR strFileName, int textureID)
{
if(!strFileName) // Return from the function if no file name was passed in
return false;
tImageTGA *pImage = LoadTGA(strFileName); // Load the image and store the data
if(pImage == NULL) // If we can't load the file, quit!
exit(0);
glGenTextures(1, &textureArray[textureID]);
glBindTexture(GL_TEXTURE_2D, textureArray[textureID]);
int textureType = GL_RGB;
if(pImage->channels == 4)
{
textureType = GL_RGBA;
}
gluBuild2DMipmaps(GL_TEXTURE_2D, pImage->channels, pImage->sizeX,
pImage->sizeY, textureType, GL_UNSIGNED_BYTE, pImage->data);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR_MIPMAP_LINEAR);
if (pImage) // If we loaded the image
{
if (pImage->data) // If there is texture data
{
delete[] pImage->data; // Free the texture data, we don't need it anymore
}
free(pImage); // Free the image structure
}
return true;
}
//text
UINT listBase[MAX_FONTS];
void print_text(unsigned int base, char *string)
{
if((base == 0 || string == NULL))
return;
glPushAttrib(GL_LIST_BIT);
glListBase(base - 32);
glCallLists(strlen(string), GL_UNSIGNED_BYTE, string);
glPopAttrib();
}
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