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#include <stdlib.h>
#include <math.h>
#include <GL/gl.h>
#include <GL/glext.h>
#include <neofx/math.h>
#include <zoom/level.h>
#include <zoom/light.h>
#include <zoom/player.h>
#include <zoom/render.h>
extern PLAYER player;
extern LEVEL *level;
extern GLuint sphere;
extern int nLights;
extern LIGHT *lights;
extern COLOR ambient;
extern GLuint lightmap;
static int SortByTex(const void *p1, const void *p2) {
return ((POLYGON*)p1)->texture - ((POLYGON*)p2)->texture;
}
void Render() {
//GLfloat std_emission[] ={{0.0, 0.0, 0.0, 1.0};
MATRIX rotate = {.f = {
player.rotycos, 0.0, -player.rotysin, 0.0,
0.0, 1.0, 0.0, 0.0,
player.rotysin, 0.0, player.rotycos, 0.0,
0.0, 0.0, 0.0, 1.0
}};
POLYGON_LIST *room;
int i, j, k;
float d;
VECTOR v, v1, v2;
VERTEX p;
COLOR c;
GLint last_tex;
glLoadIdentity();
glRotatef(player.rotx, 1.0, 0.0, 0.0);
glMultMatrixf(rotate.f);
glTranslatef(-player.pos.x, -player.pos.y, -player.pos.z);
room = DrawRoom(level, player.room);
qsort(room->polygons, room->nPolygons, sizeof(POLYGON), SortByTex);
glDepthMask(GL_TRUE);
glDepthFunc(GL_LESS);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glBlendFunc(GL_ONE, GL_ZERO);
glColor3fv((GLfloat*)&ambient);
glActiveTexture(GL_TEXTURE1);
glDisable(GL_TEXTURE_2D);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, room->polygons[0].texture);
last_tex = room->polygons[0].texture;
glBegin(GL_TRIANGLES);
for(i = 0; i < room->nPolygons; i++) {
if(last_tex != room->polygons[i].texture) {
glEnd();
glBindTexture(GL_TEXTURE_2D, room->polygons[i].texture);
last_tex = room->polygons[i].texture;
glBegin(GL_TRIANGLES);
}
glMultiTexCoord2fv(0, (GLfloat*)&room->polygons[i].texcoords[0]);
glVertex3fv((GLfloat*)&room->polygons[i].vertices[0]);
glMultiTexCoord2fv(0, (GLfloat*)&room->polygons[i].texcoords[1]);
glVertex3fv((GLfloat*)&room->polygons[i].vertices[1]);
glMultiTexCoord2fv(0, (GLfloat*)&room->polygons[i].texcoords[2]);
glVertex3fv((GLfloat*)&room->polygons[i].vertices[2]);
}
glEnd();
glDepthFunc(GL_EQUAL);
glDepthMask(GL_FALSE);
glBlendFunc(GL_ONE, GL_ONE);
glColor3f(1.0, 1.0, 1.0);
glBindTexture(GL_TEXTURE_2D, lightmap);
glActiveTexture(GL_TEXTURE1);
for(i = 0; i < nLights; i++) {
if(room->polygons[0].texture) {
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, room->polygons[0].texture);
}
else
glDisable(GL_TEXTURE_2D);
last_tex = room->polygons[0].texture;
glBegin(GL_TRIANGLES);
for(j = 0; j < room->nPolygons; j++) {
if(last_tex != room->polygons[j].texture) {
glEnd();
glBindTexture(GL_TEXTURE_2D, room->polygons[j].texture);
last_tex = room->polygons[j].texture;
glBegin(GL_TRIANGLES);
}
d = VectorDot(room->polygons[j].normal, VectorSub(room->polygons[j].vertices[0], lights[i].pos));
if(d < 0) {
c = VectorMul(lights[i].diffuse, 1.0/(d*d));
glColor3fv((GLfloat*)&c);
v1 = VectorNormalize(VectorSub(room->polygons[j].vertices[0], room->polygons[j].vertices[1]));
for(k = 0; k < 3; k++) {
p = VectorAdd(lights[i].pos, VectorMul(room->polygons[j].normals[k], d));
v = VectorSub(room->polygons[j].vertices[k], p);
v2 = VectorCross(v1, room->polygons[j].normals[k]);
glMultiTexCoord2f(0, VectorDot(v, v1)*0.04 / d + 0.5, VectorDot(v, v2)*0.04 / d + 0.5);
glMultiTexCoord2fv(1, (GLfloat*)&room->polygons[j].texcoords[k]);
glVertex3fv((GLfloat*)&room->polygons[j].vertices[k]);
}
}
}
glEnd();
}
free(room);
/*glPushMatrix();
glDisable(GL_TEXTURE_2D);
glColor3f(1.0, 1.0, 1.0);
glTranslatef(lights[0].pos.x, lights[0].pos.y, lights[0].pos.z);
glScalef(0.1, 0.1, 0.1);
glCallList(sphere);
glEnable(GL_TEXTURE_2D);
glPopMatrix();*/
glFlush();
}
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