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main.c
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main.c
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/*
James William Fletcher ( notabug.org/Vandarin )
November 2023 ( github.com/mrbid )
a war rages on in antarctica... it's tuxocide.
*/
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <ctype.h> // tolower
#ifdef WEB
#include <emscripten.h>
#include <emscripten/html5.h>
#define GL_GLEXT_PROTOTYPES
#define EGL_EGLEXT_PROTOTYPES
#endif
#define uint GLushort
#define sint GLshort
#include "inc/gl.h"
#define GLFW_INCLUDE_NONE
#include "inc/glfw3.h"
#include "inc/esAux4.h"
#include "inc/res.h"
#include "assets/intro.h"
#include "assets/ak47.h"
#include "assets/alien.h"
#include "assets/alien_pelt.h"
#include "assets/beam.h"
#include "assets/bullet.h"
#include "assets/icehole.h"
#include "assets/pelt.h"
#include "assets/terrain.h"
#include "assets/tree.h"
#include "assets/tux.h"
#include "assets/ufo.h"
//*************************************
// globals
//*************************************
const char appTitle[]="Tuxocide";
GLFWwindow* window;
uint winw=1024, winh=768;
float t=0.f, dt=0.f, lt=0.f, st=0.f, fc=0.f, lfct=0.f, aspect;
double mx,my,lx,ly,ww,wh;
// render state id's
GLint projection_id;
GLint modelview_id;
GLint position_id;
GLint normal_id;
GLint color_id;
GLint lightpos_id;
GLint opacity_id;
// render state
mat projection, view, model, modelview;
// models
ESModel mdlIntro;
ESModel mdlAK47;
ESModel mdlAlien;
ESModel mdlAlienPelt;
ESModel mdlBeam;
ESModel mdlBullet;
ESModel mdlIcehole;
ESModel mdlPelt;
ESModel mdlTerrain;
ESModel mdlTree;
ESModel mdlTux;
ESModel mdlUFO;
// game vars
#define FAR_DISTANCE 32.f
#define NEWGAME_SEED 1337
char tts[32];
uint keystate[5] = {0};
int TREE_SEED = 1337;
// camera vars
uint focus_cursor = 0;
double sens = 0.003f;
float xrot = 0.f;
vec look_dir, lookx, looky;
// player vars
float MOVE_SPEED = 0.6f;
vec pp;
// bullets
#define MAX_BULLETS 32
#define BULLET_SPEED 3.6f
vec bullet_pos[MAX_BULLETS];
vec bullet_dir[MAX_BULLETS];
vec barrel_pos;
float akdist = 0.17f;
float akxo = -0.074f;
float akreset = 0.f;
// tuxes
#define MAX_TUX 256
#define TUX_SPEED 0.07f
vec tux_pos[MAX_TUX];
float tux_nextspawn = 0.f;
// aliens
#define MAX_ALIEN 64
#define ALIEN_SPEED 0.14f
vec alien_pos[MAX_ALIEN];
uint alien_pelted[MAX_ALIEN];
// ufo
vec ufo_pos;
vec ufo_spawnpos;
uint ufo_above_pelted_alien = 0;
// stats
uint tuxkilled = 0;
uint alienpelts = 0;
uint alienskilled = 0;
//*************************************
// utility functions
//*************************************
void timestamp(char* ts)
{
const time_t tt = time(0);
strftime(ts, 16, "%H:%M:%S", localtime(&tt));
}
void timeTaken(uint ss)
{
if(ss == 1)
{
const double tt = t-st;
if(tt < 60.0)
sprintf(tts, "%.0f Sec", tt);
else if(tt < 3600.0)
sprintf(tts, "%.2f Min", tt * 0.016666667);
else if(tt < 216000.0)
sprintf(tts, "%.2f Hr", tt * 0.000277778);
else if(tt < 12960000.0)
sprintf(tts, "%.2f Days", tt * 0.00000463);
}
else
{
const double tt = t-st;
if(tt < 60.0)
sprintf(tts, "%.0f Seconds", tt);
else if(tt < 3600.0)
sprintf(tts, "%.2f Minutes", tt * 0.016666667);
else if(tt < 216000.0)
sprintf(tts, "%.2f Hours", tt * 0.000277778);
else if(tt < 12960000.0)
sprintf(tts, "%.2f Days", tt * 0.00000463);
}
}
//*************************************
// render functions
//*************************************
void modelBind(const ESModel* mdl)
{
glBindBuffer(GL_ARRAY_BUFFER, mdl->vid);
glVertexAttribPointer(position_id, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(position_id);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mdl->iid);
}
void modelBind1(const ESModel* mdl)
{
glBindBuffer(GL_ARRAY_BUFFER, mdl->vid);
glVertexAttribPointer(position_id, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(position_id);
glBindBuffer(GL_ARRAY_BUFFER, mdl->nid);
glVertexAttribPointer(normal_id, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(normal_id);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mdl->iid);
}
void modelBind3(const ESModel* mdl)
{
glBindBuffer(GL_ARRAY_BUFFER, mdl->cid);
glVertexAttribPointer(color_id, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(color_id);
glBindBuffer(GL_ARRAY_BUFFER, mdl->vid);
glVertexAttribPointer(position_id, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(position_id);
glBindBuffer(GL_ARRAY_BUFFER, mdl->nid);
glVertexAttribPointer(normal_id, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(normal_id);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mdl->iid);
}
//*************************************
// game functions
//*************************************
void newGame(unsigned int seed)
{
srand(seed);
TREE_SEED = seed;
pp = (vec){0.f, 0.f, 0.f};
xrot = 0.f;
ufo_pos = (vec){0.f, 6.f, 0.3f};
ufo_spawnpos = ufo_pos;
tux_nextspawn = 0.f;
akdist = 0.17f;
akreset = 0.f;
lt = 0.f;
for(int i = 0; i < MAX_BULLETS; i++){bullet_pos[i].z = -3.f;}
for(int i = 0; i < MAX_TUX; i++){tux_pos[i].z = -3.f;}
for(int i = 0; i < MAX_ALIEN; i++)
{
alien_pos[i].z = -3.f;
alien_pelted[i] = 0;
}
tuxkilled = 0;
alienpelts = 0;
alienskilled = 0;
char strts[16];
timestamp(&strts[0]);
printf("[%s] Game Start [%u].\n", strts, seed);
glfwSetWindowTitle(window, appTitle);
glfwSetTime(0.0);
}
void updateTitle()
{
char tmp[256];
sprintf(tmp, "TUX KILLED %u - PELTS HARVESTED %u - ALIENS KILLED %u", tuxkilled, alienpelts, alienskilled);
glfwSetWindowTitle(window, tmp);
}
//*************************************
// update & render
//*************************************
void main_loop()
{
//*************************************
// core logic
//*************************************
fc++;
glfwPollEvents();
t = (float)glfwGetTime();
dt = t-lt;
lt = t;
#ifdef WEB
EmscriptenPointerlockChangeEvent e;
if(emscripten_get_pointerlock_status(&e) == EMSCRIPTEN_RESULT_SUCCESS)
{
if(focus_cursor == 0 && e.isActive == 1)
{
glfwGetCursorPos(window, &lx, &ly);
}
focus_cursor = e.isActive;
}
#endif
//*************************************
// game logic
//*************************************
// forward & backward
if(keystate[2] == 1)
{
vec m;
vMulS(&m, look_dir, MOVE_SPEED * dt);
vSub(&pp, pp, m);
}
else if(keystate[3] == 1)
{
vec m;
vMulS(&m, look_dir, MOVE_SPEED * dt);
vAdd(&pp, pp, m);
}
// strafe left & right
if(keystate[0] == 1)
{
vec m;
vMulS(&m, lookx, MOVE_SPEED * dt);
vSub(&pp, pp, m);
}
else if(keystate[1] == 1)
{
vec m;
vMulS(&m, lookx, MOVE_SPEED * dt);
vAdd(&pp, pp, m);
}
// sprint
if(keystate[4] == 1)
{
MOVE_SPEED = 2.6f;
}
else
{
MOVE_SPEED = 0.6f;
}
// lock to floor
pp.z = -0.06f;
// reset ak47 recoil
if(akreset != 0.f && t > akreset)
{
akdist = 0.17f;
akreset = 0.f;
}
// tux spawner
if(t > tux_nextspawn)
{
for(int i = 0; i < MAX_TUX; i++)
{
if(tux_pos[i].z == -3.f)
{
tux_pos[i].z = -2.99f;
tux_pos[i].x = esRandFloat(-8.f, 8.f);
tux_pos[i].y = esRandFloat(-8.f, -6.f);
float msp = 3.f - (t*0.01f);
if(msp < 0.1f){msp = 0.1f;}
tux_nextspawn = t + esRandFloat(0.f, msp);
break;
}
}
}
// alien spawner
if(ufo_pos.x == ufo_spawnpos.x && ufo_pos.y == ufo_spawnpos.y)
{
ufo_above_pelted_alien = 0;
uint fail = 1;
int pa = -1;
for(int i = 0; i < MAX_ALIEN; i++)
{
if(alien_pelted[i] == 1)
{
pa = i;
break;
}
if(alien_pos[i].z == -3.f)
{
alien_pos[i].z = 0.f;
alien_pos[i].x = ufo_pos.x;
alien_pos[i].y = ufo_pos.y;
fail = 0;
break;
}
}
if(pa != -1)
{
ufo_spawnpos.x = alien_pos[pa].x;
ufo_spawnpos.y = alien_pos[pa].y;
}
else if(fail == 0)
{
ufo_spawnpos.x = esRandFloat(-8.f, 8.f);
ufo_spawnpos.y = esRandFloat(6.f, 8.f);
}
}
// move ufo
const float uxi = ufo_spawnpos.x - ufo_pos.x;
const float uyi = ufo_spawnpos.y - ufo_pos.y;
if(fabsf(uxi) < 0.01f){ufo_pos.x = ufo_spawnpos.x;}
if(fabsf(uyi) < 0.01f){ufo_pos.y = ufo_spawnpos.y;}
ufo_pos.x += uxi*0.01f;
ufo_pos.y += uyi*0.01f;
//*************************************
// camera
//*************************************
if(focus_cursor == 1)
{
glfwGetCursorPos(window, &mx, &my);
xrot += (lx-mx)*sens;
lx = mx;
}
mIdent(&view);
mRotate(&view, 1.5f, 1.f, 0.f, 0.f); // technically its d2PI not 1.5 but whatever
mRotate(&view, xrot, 0.f, 0.f, 1.f);
mTranslate(&view, pp.x, pp.y, pp.z);
// get look dir/axes
mGetViewZ(&look_dir, view);
mGetViewX(&lookx, view);
mGetViewY(&looky, view);
//*************************************
// render
//*************************************
// clear buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
///
// shader program change
shadeFullbright(&position_id, &projection_id, &modelview_id, &color_id, &opacity_id);
glUniformMatrix4fv(projection_id, 1, GL_FALSE, (float*)&projection.m[0][0]);
// render terrain
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&view.m[0][0]);
modelBind(&mdlTerrain);
glUniform3f(color_id, 1.f, 1.f, 1.f);
glDrawElements(GL_TRIANGLES, terrain_numind, GL_UNSIGNED_BYTE, 0);
///
// shader program change
shadeLambert1(&position_id, &projection_id, &modelview_id, &lightpos_id, &normal_id, &color_id, &opacity_id);
glUniformMatrix4fv(projection_id, 1, GL_FALSE, (float*)&projection.m[0][0]);
// render bullet
glUniform3f(color_id, 0.722f, 0.525f, 0.333f);
for(int i = 0; i < MAX_BULLETS; i++)
{
if(bullet_pos[i].z != -3.f)
{
vec inc;
vMulS(&inc, bullet_dir[i], BULLET_SPEED * dt);
vAdd(&bullet_pos[i], bullet_pos[i], inc);
if(vMag(bullet_pos[i]) > 333.f){bullet_pos[i].z = -3.f; continue;} // bullet left game bounds
mIdent(&model);
///
const vec up_norm = (vec){0.f, 0.f, 1.f};
vec c;
vCross(&c, up_norm, bullet_dir[i]);
vNorm(&c);
vec rup;
vCross(&rup, bullet_dir[i], c);
model.m[0][0] = -c.x;
model.m[0][1] = -c.y;
model.m[0][2] = -c.z;
model.m[2][0] = rup.x;
model.m[2][1] = rup.y;
model.m[2][2] = rup.z;
model.m[1][0] = bullet_dir[i].x;
model.m[1][1] = bullet_dir[i].y;
model.m[1][2] = bullet_dir[i].z;
///
mSetPos(&model, bullet_pos[i]);
mMul(&modelview, &model, &view);
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&modelview.m[0][0]);
modelBind1(&mdlBullet);
glDrawElements(GL_TRIANGLES, bullet_numind, GL_UNSIGNED_BYTE, 0);
}
}
///
// shader program change
shadeLambert3(&position_id, &projection_id, &modelview_id, &lightpos_id, &normal_id, &color_id, &opacity_id);
glUniformMatrix4fv(projection_id, 1, GL_FALSE, (float*)&projection.m[0][0]);
// render ufo
mIdent(&model);
mSetPos(&model, ufo_pos);
mMul(&modelview, &model, &view);
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&modelview.m[0][0]);
modelBind3(&mdlUFO);
glDrawElements(GL_TRIANGLES, ufo_numind, GL_UNSIGNED_SHORT, 0);
// render trees (so funny maybe should make them real collision objects?)
srandf(TREE_SEED);
for(int i = 0; i < 1024; i++)
{
// render tree
mIdent(&model);
mSetPos(&model, (vec){fRandFloat(-8.f, 8.f), fRandFloat(-8.f, 8.f), 0.f});
mMul(&modelview, &model, &view);
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&modelview.m[0][0]);
modelBind3(&mdlTree);
glDisable(GL_CULL_FACE);
glDrawElements(GL_TRIANGLES, tree_numind, GL_UNSIGNED_BYTE, 0);
glEnable(GL_CULL_FACE);
}
// render alien
for(int i = 0; i < MAX_ALIEN; i++)
{
if(alien_pos[i].z != -3.f)
{
// die time alien
if(alien_pos[i].z <= -4.f)
{
alien_pos[i].z -= 0.06f * dt;
if(alien_pos[i].z < -4.12f)
{
alien_pos[i].z = -3.f;
}
mIdent(&model);
mSetPos(&model, (vec){alien_pos[i].x, alien_pos[i].y, alien_pos[i].z+4.f});
mRotZ(&model, t*7.2f);
mMul(&modelview, &model, &view);
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&modelview.m[0][0]);
modelBind3(&mdlAlien);
glDrawElements(GL_TRIANGLES, alien_numind, GL_UNSIGNED_SHORT, 0);
continue;
}
// bullet hit a alien?
for(int j = 0; j < MAX_BULLETS; j++)
{
if(bullet_pos[j].z != -3.f)
{
const float xm = (alien_pos[i].x - bullet_pos[j].x);
const float ym = (alien_pos[i].y - bullet_pos[j].y);
if(xm*xm + ym*ym < 0.001225f)
{
alien_pelted[i] = 0;
alien_pos[i].z = -4.f;
bullet_pos[j].z = -3.f;
alienskilled++;
updateTitle();
break;
}
}
}
if(alien_pelted[i] == 1)
{
const float xm = (alien_pos[i].x - ufo_pos.x);
const float ym = (alien_pos[i].y - ufo_pos.y);
if(xm*xm + ym*ym < 0.06f)
{
ufo_above_pelted_alien = 1;
alien_pelted[i] = 0;
alienpelts++;
updateTitle();
}
}
mIdent(&model);
mSetPos(&model, alien_pos[i]);
// find nearest target
vec tp;
if(alien_pelted[i] == 0)
{
float ld = 1337.f;
for(int j = 0; j < MAX_TUX; j++)
{
if(tux_pos[j].z != -3.f)
{
float nd;
if(tux_pos[j].z == -4.f)
{
nd = vDistSq(alien_pos[i], (vec){tux_pos[j].x, tux_pos[j].y, tux_pos[j].z+4.f});
}
else
{
nd = vDistSq(alien_pos[i], tux_pos[j]);
}
if(nd < 0.003)
{
tux_pos[j].z = -3.f;
alien_pelted[i] = 1;
tuxkilled++;
updateTitle();
}
if(nd < ld)
{
ld = nd;
tp = tux_pos[j];
}
}
}
}
else
{
tp = ufo_pos;
}
vec dir_norm = tp;
vSub(&dir_norm, dir_norm, alien_pos[i]);
dir_norm.z = 0.f;
vNorm(&dir_norm);
mSetDir(&model, dir_norm, (vec){0.f, 0.f, 1.f});
vec inc;
vMulS(&inc, dir_norm, ALIEN_SPEED * dt);
vAdd(&alien_pos[i], alien_pos[i], inc);
mMul(&modelview, &model, &view);
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&modelview.m[0][0]);
modelBind3(&mdlAlien);
glDrawElements(GL_TRIANGLES, alien_numind, GL_UNSIGNED_SHORT, 0);
if(alien_pelted[i] == 1)
{
modelBind3(&mdlAlienPelt);
glDrawElements(GL_TRIANGLES, alien_pelt_numind, GL_UNSIGNED_BYTE, 0);
}
}
}
// render tux
for(int i = 0; i < MAX_TUX; i++)
{
if(tux_pos[i].z != -3.f)
{
if(tux_pos[i].y > 14.f) // tux left game bounds - go back down the icehole
{
// sink tux
tux_pos[i].z -= 0.02f * dt;
// done
if(tux_pos[i].z < -0.1f)
{
tux_pos[i].z = -3.f;
continue;
}
// render icehole
float opa = 1.f - ((tux_pos[i].z+0.07f) * -33.333333333f);
if(opa > 1.f){opa = 1.f;}
glUniform1f(opacity_id, opa);
mIdent(&model);
mSetPos(&model, (vec){tux_pos[i].x, tux_pos[i].y, 0.f});
mMul(&modelview, &model, &view);
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&modelview.m[0][0]);
modelBind3(&mdlIcehole);
if(opa < 1.f){glEnable(GL_BLEND);}
glDrawElements(GL_TRIANGLES, icehole_numind, GL_UNSIGNED_BYTE, 0);
if(opa < 1.f){glDisable(GL_BLEND);}
// render tux
mIdent(&model);
mSetPos(&model, tux_pos[i]);
mRotZ(&model, t*7.2f);
mMul(&modelview, &model, &view);
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&modelview.m[0][0]);
modelBind3(&mdlTux);
glDrawElements(GL_TRIANGLES, tux_numind, GL_UNSIGNED_SHORT, 0);
//done
continue;
}
else if(tux_pos[i].z == -4.f) // is pelted? aka dead
{
// bullet hit a pelt?
for(int j = 0; j < MAX_BULLETS; j++)
{
if(bullet_pos[j].z != -3.f)
{
const float xm = (tux_pos[i].x - bullet_pos[j].x);
const float ym = (tux_pos[i].y - bullet_pos[j].y);
if(xm*xm + ym*ym < 0.001225f)
{
tux_pos[i].z = -3.f;
bullet_pos[j].z = -3.f;
break;
}
}
}
// render pelt
mIdent(&model);
mSetPos(&model, (vec){tux_pos[i].x, tux_pos[i].y, 0.f});
mRotZ(&model, t*1.3f);
mMul(&modelview, &model, &view);
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&modelview.m[0][0]);
modelBind3(&mdlPelt);
glDrawElements(GL_TRIANGLES, pelt_numind, GL_UNSIGNED_BYTE, 0);
// done
continue;
}
else if(tux_pos[i].z < 0.f) // rise from the icehole
{
// rise tux
tux_pos[i].z += 0.1f * dt;
// render icehole
float opa = tux_pos[i].z+3.f;
if(opa > 1.f){opa = 1.f;}
glUniform1f(opacity_id, opa);
mIdent(&model);
mSetPos(&model, (vec){tux_pos[i].x, tux_pos[i].y, 0.f});
mMul(&modelview, &model, &view);
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&modelview.m[0][0]);
modelBind3(&mdlIcehole);
if(opa < 1.f){glEnable(GL_BLEND);}
glDrawElements(GL_TRIANGLES, icehole_numind, GL_UNSIGNED_BYTE, 0);
if(opa < 1.f){glDisable(GL_BLEND);}
}
else // move tux
{
tux_pos[i].y += TUX_SPEED * dt;
}
// bullet hit a tux?
for(int j = 0; j < MAX_BULLETS; j++)
{
if(bullet_pos[j].z != -3.f)
{
const float xm = (tux_pos[i].x - bullet_pos[j].x);
const float ym = (tux_pos[i].y - bullet_pos[j].y);
if(xm*xm + ym*ym < 0.001225f)
{
tux_pos[i].z = -4.f;
bullet_pos[j].z = -3.f;
tuxkilled++;
updateTitle();
break;
}
}
}
// render tux
mIdent(&model);
mSetPos(&model, tux_pos[i]);
mRotZ(&model, 180.f*DEG2RAD); // can re-export to right rotation
mMul(&modelview, &model, &view);
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&modelview.m[0][0]);
modelBind3(&mdlTux);
glDrawElements(GL_TRIANGLES, tux_numind, GL_UNSIGNED_SHORT, 0);
}
}
///
// render beam
if((fabsf(uxi) < 0.1f && fabsf(uyi) < 0.1f) || ufo_above_pelted_alien != 0)
{
// shader program change
shadeLambert1(&position_id, &projection_id, &modelview_id, &lightpos_id, &normal_id, &color_id, &opacity_id);
glUniformMatrix4fv(projection_id, 1, GL_FALSE, (float*)&projection.m[0][0]);
glUniform3f(color_id, 0.00784f, 1.f, 0.f);
glUniform1f(opacity_id, 0.5f);
mIdent(&model);
mSetPos(&model, ufo_pos);
mMul(&modelview, &model, &view);
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&modelview.m[0][0]);
modelBind1(&mdlBeam);
glEnable(GL_BLEND);
glDrawElements(GL_TRIANGLES, beam_numind, GL_UNSIGNED_BYTE, 0);
glDisable(GL_BLEND);
// shader program change
shadeLambert3(&position_id, &projection_id, &modelview_id, &lightpos_id, &normal_id, &color_id, &opacity_id);
glUniformMatrix4fv(projection_id, 1, GL_FALSE, (float*)&projection.m[0][0]);
}
///
// render AK-47
mIdent(&model);
vec ld = look_dir;
ld.z = 0.f;
if(akxo == 0.f)
{
vMulS(&ld, ld, akdist-0.08f); // far from camera
}
else
{
vMulS(&ld, ld, akdist); // far from camera
}
vec np = (vec){-pp.x, -pp.y, -pp.z};
vAdd(&np, np, ld);
// x offset
vec vx = lookx;
vMulS(&vx, vx, akxo);
vAdd(&np, np, vx);
// y offset
vec vy = looky;
if(akxo == 0.f)
{
vMulS(&vy, vy, 0.0088f);
}
else
{
vMulS(&vy, vy, 0.034f);
}
vAdd(&np, np, vy);
barrel_pos = np;
// rotate to camera direction with slight offset and set pos
if(akxo == 0.f)
{
mRotZ(&model, -(xrot+0.001f));
}
else
{
mRotZ(&model, -(xrot-0.28f));
}
mSetPos(&model, np);
// render it
mMul(&modelview, &model, &view);
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&modelview.m[0][0]);
modelBind3(&mdlAK47);
glClear(GL_DEPTH_BUFFER_BIT);
glDrawElements(GL_TRIANGLES, ak47_numind, GL_UNSIGNED_SHORT, 0);
///
// render intro
if(t < 5.f)
{
// shader program change
shadeFullbright(&position_id, &projection_id, &modelview_id, &color_id, &opacity_id);
glUniformMatrix4fv(projection_id, 1, GL_FALSE, (float*)&projection.m[0][0]);
if(t < 4.f)
{
glUniform1f(opacity_id, 1.f);
}
else
{
glUniform1f(opacity_id, 1.f-(t-4.f));
}
glEnable(GL_BLEND);
{
vec ld = look_dir;
vMulS(&ld, ld, 0.8f);
vec np = (vec){-pp.x, -pp.y, -pp.z};
vAdd(&np, np, ld);
mIdent(&model);
mSetPos(&model, np);
mRotZ(&model, -xrot);
mMul(&modelview, &model, &view);
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&modelview.m[0][0]);
modelBind(&mdlIntro);
glUniform3f(color_id, 0.f, 0.7f, 0.7f);
glDrawElements(GL_TRIANGLES, intro_numind, GL_UNSIGNED_SHORT, 0);
}
{
vec ld = look_dir;
vMulS(&ld, ld, 0.8f);
vec np = (vec){-pp.x, -pp.y, -pp.z};
vAdd(&np, np, ld);
vec vy = looky;
vMulS(&vy, vy, -0.002f);
vAdd(&np, np, vy);
mIdent(&model);
mSetPos(&model, np);
mRotZ(&model, -xrot);
mMul(&modelview, &model, &view);
glUniformMatrix4fv(modelview_id, 1, GL_FALSE, (float*)&modelview.m[0][0]);
modelBind(&mdlIntro);
glUniform3f(color_id, 0.f, 1.f, 1.f);
glDrawElements(GL_TRIANGLES, intro_numind, GL_UNSIGNED_SHORT, 0);
}
glDisable(GL_BLEND);
}
///
// display render
glfwSwapBuffers(window);
}
//*************************************
// input
//*************************************
static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
// control
if(action == GLFW_PRESS)
{
if( key == GLFW_KEY_A || key == GLFW_KEY_LEFT) { keystate[0] = 1; }
else if(key == GLFW_KEY_D || key == GLFW_KEY_RIGHT) { keystate[1] = 1; }
else if(key == GLFW_KEY_W || key == GLFW_KEY_UP) { keystate[2] = 1; }
else if(key == GLFW_KEY_S || key == GLFW_KEY_DOWN) { keystate[3] = 1; }
else if(key == GLFW_KEY_LEFT_SHIFT ||
key == GLFW_KEY_RIGHT_CONTROL) { keystate[4] = 1;}
else if(key == GLFW_KEY_N) // new game
{
timeTaken(0);
char strts[16];
timestamp(&strts[0]);
printf("[%s] Game End.\n", strts);
printf("[%s] TUX KILLED %u - PELTS HARVESTED %u - ALIENS KILLED %u\n", strts, tuxkilled, alienpelts, alienskilled);
printf("[%s] Time-Taken: %s or %g Seconds\n\n", strts, tts, t-st);
newGame(time(0));
}
else if(key == GLFW_KEY_ESCAPE) // toggle mouse focus
{
focus_cursor = 0;
#ifndef WEB
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
glfwGetCursorPos(window, &lx, &ly);
#endif
}
else if(key == GLFW_KEY_F) // show average fps
{
if(t-lfct > 2.0)
{
char strts[16];
timestamp(&strts[0]);
printf("[%s] FPS: %g\n", strts, fc/(t-lfct));
lfct = t;
fc = 0;
}
}
}
else if(action == GLFW_RELEASE)
{
if( key == GLFW_KEY_A || key == GLFW_KEY_LEFT) { keystate[0] = 0; }
else if(key == GLFW_KEY_D || key == GLFW_KEY_RIGHT) { keystate[1] = 0; }
else if(key == GLFW_KEY_W || key == GLFW_KEY_UP) { keystate[2] = 0; }
else if(key == GLFW_KEY_S || key == GLFW_KEY_DOWN) { keystate[3] = 0; }
else if(key == GLFW_KEY_LEFT_SHIFT ||
key == GLFW_KEY_RIGHT_CONTROL) { keystate[4] = 0;}
}
}
void mouse_button_callback(GLFWwindow* window, int button, int action, int mods)
{
if(action == GLFW_PRESS)
{
if(focus_cursor == 0)
{
focus_cursor = 1;
#ifndef WEB
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
glfwGetCursorPos(window, &lx, &ly);
#endif
return;
}
if(button == GLFW_MOUSE_BUTTON_LEFT)
{
for(int i = 0; i < MAX_BULLETS; i++)
{
if(bullet_pos[i].z == -3.f)
{
bullet_dir[i] = look_dir;
bullet_dir[i].z = 0.f;
bullet_pos[i] = barrel_pos;
akdist = 0.164f;
akreset = t+0.08f;
break;
}
}
}
else if(button == GLFW_MOUSE_BUTTON_RIGHT)
{
akxo = 0.f;
}
}
else if(action == GLFW_RELEASE)
{
if(button == GLFW_MOUSE_BUTTON_RIGHT)
{
akxo = -0.074f;
}
}
}
void window_size_callback(GLFWwindow* window, int width, int height)
{
winw = width, winh = height;
glViewport(0, 0, winw, winh);
aspect = (float)winw / (float)winh;
ww = winw, wh = winh;
mIdent(&projection);
mPerspective(&projection, 60.0f, aspect, 0.001f, FAR_DISTANCE);
glUniformMatrix4fv(projection_id, 1, GL_FALSE, (float*)&projection.m[0][0]);
}
#ifdef WEB
EM_BOOL emscripten_resize_event(int eventType, const EmscriptenUiEvent *uiEvent, void *userData)
{
winw = uiEvent->documentBodyClientWidth;
winh = uiEvent->documentBodyClientHeight;
window_size_callback(window, winw, winh);
emscripten_set_canvas_element_size("canvas", winw, winh);
return EM_FALSE;
}
#endif