kmMat3* kmMat3LookAt(kmMat3* pOut, const kmVec3* pEye,
const kmVec3* pCenter, const kmVec3* pUp)
{
kmVec3 f, up, s, u;
kmVec3Subtract(&f, pCenter, pEye);
kmVec3Normalize(&f, &f);
kmVec3Assign(&up, pUp);
kmVec3Normalize(&up, &up);
kmVec3Cross(&s, &f, &up);
kmVec3Normalize(&s, &s);
kmVec3Cross(&u, &s, &f);
kmVec3Normalize(&s, &s);
pOut->mat[0] = s.x;
pOut->mat[3] = s.y;
pOut->mat[6] = s.z;
pOut->mat[1] = u.x;
pOut->mat[4] = u.y;
pOut->mat[7] = u.z;
pOut->mat[2] = -f.x;
pOut->mat[5] = -f.y;
pOut->mat[8] = -f.z;
return pOut;
}
kmVec3* kmVec3ProjectOnToPlane(kmVec3* pOut, const kmVec3* point, const struct kmPlane* plane) {
kmRay3 ray;
kmVec3Assign(&ray.start, point);
ray.dir.x = -plane->a;
ray.dir.y = -plane->b;
ray.dir.z = -plane->c;
kmRay3IntersectPlane(pOut, &ray, plane);
return pOut;
}
/**
* Returns the vector passed in set to unit length
* the result is stored in pOut.
*/
kmVec3* kmVec3Normalize(kmVec3* pOut, const kmVec3* pIn)
{
if (!pIn->x && !pIn->y && !pIn->z)
return kmVec3Assign(pOut, pIn);
kmScalar l = 1.0f / kmVec3Length(pIn);
kmVec3 v;
v.x = pIn->x * l;
v.y = pIn->y * l;
v.z = pIn->z * l;
pOut->x = v.x;
pOut->y = v.y;
pOut->z = v.z;
return pOut;
}
/**
* Builds a translation matrix in the same way as gluLookAt()
* the resulting matrix is stored in pOut. pOut is returned.
*/
kmMat4* const kmMat4LookAt(kmMat4* pOut, const kmVec3* pEye,
const kmVec3* pCenter, const kmVec3* pUp)
{
kmVec3 f, up, s, u;
kmMat4 translate;
kmVec3Subtract(&f, pCenter, pEye);
kmVec3Normalize(&f, &f);
kmVec3Assign(&up, pUp);
kmVec3Normalize(&up, &up);
kmVec3Cross(&s, &f, &up);
kmVec3Normalize(&s, &s);
kmVec3Cross(&u, &s, &f);
kmVec3Normalize(&s, &s);
kmMat4Identity(pOut);
pOut->mat[0] = s.x;
pOut->mat[4] = s.y;
pOut->mat[8] = s.z;
pOut->mat[1] = u.x;
pOut->mat[5] = u.y;
pOut->mat[9] = u.z;
pOut->mat[2] = -f.x;
pOut->mat[6] = -f.y;
pOut->mat[10] = -f.z;
kmMat4Translation(&translate, -pEye->x, -pEye->y, -pEye->z);
kmMat4Multiply(pOut, pOut, &translate);
return pOut;
}
int main()
{
lightDir.x=0.5;
lightDir.y=.7;
lightDir.z=-0.5;
kmVec3Normalize(&lightDir,&lightDir);
// creates a window and GLES context
// create a window and GLES context
if (!glfwInit())
exit(EXIT_FAILURE);
window = glfwCreateWindow(width, height, "I N V A D E R S ! ! !", NULL, NULL);
if (!window) {
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwSetWindowSizeCallback(window,window_size_callback);
glfwMakeContextCurrent(window);
// all the shaders have at least texture unit 0 active so
// activate it now and leave it active
glActiveTexture(GL_TEXTURE0);
// The obj shapes and their textures are loaded
cubeTex = loadPNG("resources/textures/dice.png");
loadObj(&cubeObj, "resources/models/cube.gbo",
"resources/shaders/textured.vert", "resources/shaders/textured.frag");
shipTex = loadPNG("resources/textures/shipv2.png");
loadObjCopyShader(&shipObj,"resources/models/ship.gbo",&cubeObj);
alienTex = loadPNG("resources/textures/alien.png");
loadObjCopyShader(&alienObj, "resources/models/alien.gbo", &cubeObj);
shotTex = loadPNG("resources/textures/shot.png");
loadObjCopyShader(&shotObj, "resources/models/shot.gbo", &cubeObj);
expTex = loadPNG("resources/textures/explosion.png");
playerPos.x = 0;
playerPos.y = 0;
playerPos.z = 0;
kmMat4Identity(&view);
pEye.x = 0;
pEye.y = 2;
pEye.z = 4;
pCenter.x = 0;
pCenter.y = 0;
pCenter.z = -5;
pUp.x = 0;
pUp.y = 1;
pUp.z = 0;
kmMat4LookAt(&view, &pEye, &pCenter, &pUp);
// projection matrix, as distance increases
// the way the model is drawn is effected
kmMat4Identity(&projection);
kmMat4PerspectiveProjection(&projection, 45,
(float)width/ height, 0.1, 1000);
glViewport(0, 0, width,height);
// these two matrices are pre combined for use with each model render
kmMat4Assign(&vp, &projection);
kmMat4Multiply(&vp, &vp, &view);
// initialises glprint's matrix shader and texture
initGlPrint(width,height);
font1=createFont("resources/textures/font.png",0,256,16,16,16);
font2=createFont("resources/textures/bigfont.png",32,512,9.5,32,48);
glCullFace(GL_BACK);
glEnable(GL_CULL_FACE);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_BLEND); // only used by glprintf
glEnable(GL_DEPTH_TEST);
int num_frames = 0;
bool quit = false;
resetAliens();
for (int n = 0; n < MAX_PLAYER_SHOTS; n++) {
playerShots[n].alive = false;
}
initPointClouds("resources/shaders/particle.vert",
"resources/shaders/particle.frag",(float)width/24.0);
for (int n = 0; n < MAX_ALIENS; n++) {
aliens[n].explosion=createPointCloud(40);
resetExposion(aliens[n].explosion); // sets initials positions
}
glClearColor(0, .5, 1, 1);
while (!quit) { // the main loop
clock_gettime(0,&ts); // note the time BEFORE we start to render the current frame
glfwPollEvents();
if (glfwGetKey(window,GLFW_KEY_ESCAPE)==GLFW_PRESS || glfwWindowShouldClose(window))
quit = true;
float rad; // radians rotation based on frame counter
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
frame++;
rad = frame * (0.0175f * 2);
//kmMat4Identity(&model);
kmMat4Translation(&model, playerPos.x, playerPos.y, playerPos.z);
playerCroll +=
(PIDcal(playerRoll, playerCroll, &playerPre_error, &playerIntegral)
/ 2);
// kmMat4RotationPitchYawRoll(&model, 0, 3.1416, playerCroll * 3); //
kmMat4RotationYawPitchRoll(&rot,0,3.1416,-playerCroll*3);
kmMat4Multiply(&model, &model, &rot);
kmMat4Assign(&mvp, &vp);
kmMat4Multiply(&mvp, &mvp, &model);
kmMat4Assign(&mv, &view);
kmMat4Multiply(&mv, &mv, &model);
glBindTexture(GL_TEXTURE_2D, shipTex);
drawObj(&shipObj, &mvp, &mv, lightDir, viewDir);
glPrintf(50 + sinf(rad) * 16, 240 + cosf(rad) * 16,
font2,"frame=%i", frame);
kmVec3 tmp;
playerFireCount--;
if (glfwGetKey(window,GLFW_KEY_LEFT_CONTROL)==GLFW_PRESS && playerFireCount < 0) {
struct playerShot_t *freeShot;
freeShot = getFreeShot();
if (freeShot != 0) {
playerFireCount = 15;
freeShot->alive = true;
kmVec3Assign(&freeShot->pos, &playerPos);
}
}
for (int n = 0; n < MAX_PLAYER_SHOTS; n++) {
if (playerShots[n].alive) {
playerShots[n].pos.z -= .08;
if (playerShots[n].pos.z < -10)
playerShots[n].alive = false;
//kmMat4Identity(&model);
kmMat4Translation(&model, playerShots[n].pos.x,
playerShots[n].pos.y,
playerShots[n].pos.z);
//kmMat4RotationPitchYawRoll(&model, rad * 4, 0,
// -rad * 4);
kmMat4RotationYawPitchRoll(&rot,rad*4,0,-rad*4);
kmMat4Multiply(&model,&model,&rot);
kmMat4Assign(&mvp, &vp);
kmMat4Multiply(&mvp, &mvp, &model);
kmMat4Assign(&mv, &view);
kmMat4Multiply(&mv, &mv, &model);
glBindTexture(GL_TEXTURE_2D, shotTex);
drawObj(&shotObj, &mvp, &mv, lightDir, viewDir);
}
}
playerRoll = 0;
if (glfwGetKey(window,GLFW_KEY_LEFT)==GLFW_PRESS && playerPos.x > -10) {
playerPos.x -= 0.1;
playerRoll = .2;
}
if (glfwGetKey(window,GLFW_KEY_RIGHT)==GLFW_PRESS && playerPos.x < 10) {
playerPos.x += 0.1;
playerRoll = -.2;
}
pEye.x = playerPos.x * 1.25;
pCenter.x = playerPos.x;
pCenter.y = playerPos.y + 1;
pCenter.z = playerPos.z;
int deadAliens;
deadAliens = 0;
for (int n = 0; n < MAX_ALIENS; n++) {
if (aliens[n].alive == true) {
//kmMat4Identity(&model);
kmMat4Translation(&model, aliens[n].pos.x,
aliens[n].pos.y, aliens[n].pos.z);
//kmMat4RotationPitchYawRoll(&model, -.4, 0, 0);
kmMat4RotationYawPitchRoll(&rot,.2,0,0);
kmMat4Multiply(&model,&model,&rot);
kmMat4Assign(&mvp, &vp);
kmMat4Multiply(&mvp, &mvp, &model);
kmMat4Assign(&mv, &view);
kmMat4Multiply(&mv, &mv, &model);
glBindTexture(GL_TEXTURE_2D, alienTex);
drawObj(&alienObj, &mvp, &mv, lightDir, viewDir);
kmVec3 d;
for (int i = 0; i < MAX_PLAYER_SHOTS; i++) {
kmVec3Subtract(&d, &aliens[n].pos,
&playerShots[i].pos);
if (kmVec3Length(&d) < .7
&& playerShots[i].alive) {
aliens[n].alive = false;
playerShots[i].alive = false;
aliens[n].exploding = true;
resetExposion(aliens[n].explosion);
}
}
}
if (aliens[n].alive != true && aliens[n].exploding != true) {
deadAliens++;
}
}
if (deadAliens == MAX_ALIENS) {
resetAliens();
}
// draw explosions after ALL aliens
for (int n = 0; n < MAX_ALIENS; n++) {
if (aliens[n].exploding==true) {
kmMat4Identity(&model);
kmMat4Translation(&model, aliens[n].pos.x,
aliens[n].pos.y, aliens[n].pos.z);
kmMat4Assign(&mvp, &vp);
kmMat4Multiply(&mvp, &mvp, &model);
glBindTexture(GL_TEXTURE_2D, expTex);
drawPointCloud(aliens[n].explosion, &mvp);
aliens[n].explosion->tick=aliens[n].explosion->tick+0.05;
if (aliens[n].explosion->tick>1.25) {
aliens[n].exploding=false;
} else {
// update the explosion
for (int i=0; i<aliens[n].explosion->totalPoints; i++) {
float t;
t=aliens[n].explosion->tick;
if (i>aliens[n].explosion->totalPoints/2) t=t/2.0;
aliens[n].explosion->pos[i*3]=aliens[n].explosion->vel[i*3] * t;
aliens[n].explosion->pos[i*3+1]=aliens[n].explosion->vel[i*3+1] * t;
aliens[n].explosion->pos[i*3+2]=aliens[n].explosion->vel[i*3+2] * t;
}
}
}
}
// move camera
kmMat4LookAt(&view, &pEye, &pCenter, &pUp);
kmMat4Assign(&vp, &projection);
kmMat4Multiply(&vp, &vp, &view);
kmVec3Subtract(&viewDir,&pEye,&pCenter);
kmVec3Normalize(&viewDir,&viewDir);
// dump values
glPrintf(100, 280, font1,"eye %3.2f %3.2f %3.2f ", pEye.x, pEye.y, pEye.z);
glPrintf(100, 296, font1,"centre %3.2f %3.2f %3.2f ", pCenter.x, pCenter.y,
pCenter.z);
glPrintf(100, 340, font1,"frame %i %i ", frame, frame % 20);
glfwSwapBuffers(window);
ts.tv_nsec+=20000000; // 1000000000 / 50 = 50hz less time to render the frame
//thrd_sleep(&ts,NULL); // tinycthread
usleep(20000); // while I work out why tinycthread that was working isnt.... :/
}
glfwDestroyWindow(window);
glfwTerminate();
return 0;
}
kmAABB3* kmAABB3Assign(kmAABB3* pOut, const kmAABB3* pIn)
{
kmVec3Assign(&pOut->min, &pIn->min);
kmVec3Assign(&pOut->max, &pIn->max);
return pOut;
}
/* \brief set camera's up vector */
GLHCKAPI void glhckCameraUpVector(glhckCamera *object, const kmVec3 *upVector)
{
CALL(1, "%p, "VEC3S, object, VEC3(upVector));
kmVec3Assign(&object->view.upVector, upVector);
}
kmQuaternion* kmQuaternionRotationBetweenVec3(kmQuaternion* pOut, const kmVec3* vec1, const kmVec3* vec2, const kmVec3* fallback) {
kmVec3 v1, v2;
kmScalar a;
kmVec3Assign(&v1, vec1);
kmVec3Assign(&v2, vec2);
kmVec3Normalize(&v1, &v1);
kmVec3Normalize(&v2, &v2);
a = kmVec3Dot(&v1, &v2);
if (a >= 1.0) {
kmQuaternionIdentity(pOut);
return pOut;
}
if (a < (1e-6f - 1.0f)) {
if (fabs(kmVec3LengthSq(fallback)) < kmEpsilon) {
kmQuaternionRotationAxisAngle(pOut, fallback, kmPI);
} else {
kmVec3 axis;
kmVec3 X;
X.x = 1.0;
X.y = 0.0;
X.z = 0.0;
kmVec3Cross(&axis, &X, vec1);
/*If axis is zero*/
if (fabs(kmVec3LengthSq(&axis)) < kmEpsilon) {
kmVec3 Y;
Y.x = 0.0;
Y.y = 1.0;
Y.z = 0.0;
kmVec3Cross(&axis, &Y, vec1);
}
kmVec3Normalize(&axis, &axis);
kmQuaternionRotationAxisAngle(pOut, &axis, kmPI);
}
} else {
kmScalar s = sqrtf((1+a) * 2);
kmScalar invs = 1 / s;
kmVec3 c;
kmVec3Cross(&c, &v1, &v2);
pOut->x = c.x * invs;
pOut->y = c.y * invs;
pOut->z = c.z * invs;
pOut->w = s * 0.5f;
kmQuaternionNormalize(pOut, pOut);
}
return pOut;
}
kmRay3* kmRay3FromPointAndDirection(kmRay3* ray, const kmVec3* point, const kmVec3* direction) {
kmVec3Assign(&ray->start, point);
kmVec3Assign(&ray->dir, direction);
return ray;
}
int main()
{
lightDir.x=0.5;
lightDir.y=.7;
lightDir.z=-0.5;
kmVec3Normalize(&lightDir,&lightDir);
// creates a window and GLES context
if (makeContext() != 0)
exit(-1);
// all the shaders have at least texture unit 0 active so
// activate it now and leave it active
glActiveTexture(GL_TEXTURE0);
// The obj shapes and their textures are loaded
cubeTex = loadPNG("resources/textures/dice.png");
loadObj(&cubeObj, "resources/models/cube.gbo",
"resources/shaders/textured.vert", "resources/shaders/textured.frag");
shipTex = loadPNG("resources/textures/shipv2.png");
loadObjCopyShader(&shipObj,"resources/models/ship.gbo",&cubeObj);
alienTex = loadPNG("resources/textures/alien.png");
loadObjCopyShader(&alienObj, "resources/models/alien.gbo", &cubeObj);
shotTex = loadPNG("resources/textures/shot.png");
loadObjCopyShader(&shotObj, "resources/models/shot.gbo", &cubeObj);
expTex = loadPNG("resources/textures/explosion.png");
playerPos.x = 0;
playerPos.y = 0;
playerPos.z = 0;
kmMat4Identity(&view);
pEye.x = 0;
pEye.y = 2;
pEye.z = 4;
pCenter.x = 0;
pCenter.y = 0;
pCenter.z = -5;
pUp.x = 0;
pUp.y = 1;
pUp.z = 0;
kmMat4LookAt(&view, &pEye, &pCenter, &pUp);
// projection matrix, as distance increases
// the way the model is drawn is effected
kmMat4Identity(&projection);
kmMat4PerspectiveProjection(&projection, 45,
(float)getDisplayWidth() / getDisplayHeight(), 0.1, 100);
glViewport(0, 0, getDisplayWidth(), getDisplayHeight());
// these two matrices are pre combined for use with each model render
kmMat4Assign(&vp, &projection);
kmMat4Multiply(&vp, &vp, &view);
// initialises glprint's matrix shader and texture
initGlPrint(getDisplayWidth(), getDisplayHeight());
font1=createFont("resources/textures/font.png",0,256,16,16,16);
font2=createFont("resources/textures/bigfont.png",32,512,9.5,32,48);
glCullFace(GL_BACK);
glEnable(GL_CULL_FACE);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_BLEND); // only used by glprintf
glEnable(GL_DEPTH_TEST);
struct timeval t, ta, t1, t2; // fps stuff
gettimeofday(&t1, NULL);
int num_frames = 0;
bool quit = false;
mouse = getMouse();
keys = getKeys();
resetAliens();
for (int n = 0; n < MAX_PLAYER_SHOTS; n++) {
playerShots[n].alive = false;
}
initPointClouds("resources/shaders/particle.vert",
"resources/shaders/particle.frag",(float)getDisplayWidth()/24.0);
for (int n = 0; n < MAX_ALIENS; n++) {
aliens[n].explosion=createPointCloud(40);
resetExposion(aliens[n].explosion); // sets initials positions
}
while (!quit) { // the main loop
doEvents(); // update mouse and key arrays
// mask of 4 is right mouse
if (keys[KEY_ESC])
quit = true;
glClearColor(0, .5, 1, 1);
// render between two gettimeofday calls so
// we can sleep long enough to roughly sync
// to ~60fps but not on the pi!
// TODO find something a tad more elegent
long i;
gettimeofday(&t, NULL);
i = t.tv_sec * 1e6 + t.tv_usec;
// render();
float rad; // radians rotation based on frame counter
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
frame++;
rad = frame * (0.0175f * 2);
kmMat4Identity(&model);
kmMat4Translation(&model, playerPos.x, playerPos.y, playerPos.z);
playerCroll +=
(PIDcal(playerRoll, playerCroll, &playerPre_error, &playerIntegral)
/ 2);
kmMat4RotationPitchYawRoll(&model, 0, 3.1416, playerCroll * 3); //
kmMat4Assign(&mvp, &vp);
kmMat4Multiply(&mvp, &mvp, &model);
kmMat4Assign(&mv, &view);
kmMat4Multiply(&mv, &mv, &model);
glBindTexture(GL_TEXTURE_2D, shipTex);
drawObj(&shipObj, &mvp, &mv, lightDir, viewDir);
glPrintf(50 + sinf(rad) * 16, 240 + cosf(rad) * 16,
font2,"frame=%i fps=%3.2f", frame, lfps);
kmVec3 tmp;
playerFireCount--;
if (keys[KEY_LCTRL] && playerFireCount < 0) {
struct playerShot_t *freeShot;
freeShot = getFreeShot();
if (freeShot != 0) {
playerFireCount = 15;
freeShot->alive = true;
kmVec3Assign(&freeShot->pos, &playerPos);
}
}
for (int n = 0; n < MAX_PLAYER_SHOTS; n++) {
if (playerShots[n].alive) {
playerShots[n].pos.z -= .08;
if (playerShots[n].pos.z < -10)
playerShots[n].alive = false;
kmMat4Identity(&model);
kmMat4Translation(&model, playerShots[n].pos.x,
playerShots[n].pos.y,
playerShots[n].pos.z);
kmMat4RotationPitchYawRoll(&model, rad * 4, 0,
-rad * 4);
kmMat4Assign(&mvp, &vp);
kmMat4Multiply(&mvp, &mvp, &model);
kmMat4Assign(&mv, &view);
kmMat4Multiply(&mv, &mv, &model);
glBindTexture(GL_TEXTURE_2D, shotTex);
drawObj(&shotObj, &mvp, &mv, lightDir, viewDir);
}
}
playerRoll = 0;
if (keys[KEY_CURSL] && playerPos.x > -10) {
playerPos.x -= 0.1;
playerRoll = .2;
}
if (keys[KEY_CURSR] && playerPos.x < 10) {
playerPos.x += 0.1;
playerRoll = -.2;
}
pEye.x = playerPos.x * 1.25;
pCenter.x = playerPos.x;
pCenter.y = playerPos.y + 1;
pCenter.z = playerPos.z;
int deadAliens;
deadAliens = 0;
for (int n = 0; n < MAX_ALIENS; n++) {
if (aliens[n].alive == true) {
kmMat4Identity(&model);
kmMat4Translation(&model, aliens[n].pos.x,
aliens[n].pos.y, aliens[n].pos.z);
kmMat4RotationPitchYawRoll(&model, -.4, 0, 0);
kmMat4Assign(&mvp, &vp);
kmMat4Multiply(&mvp, &mvp, &model);
kmMat4Assign(&mv, &view);
kmMat4Multiply(&mv, &mv, &model);
glBindTexture(GL_TEXTURE_2D, alienTex);
drawObj(&alienObj, &mvp, &mv, lightDir, viewDir);
kmVec3 d;
for (int i = 0; i < MAX_PLAYER_SHOTS; i++) {
kmVec3Subtract(&d, &aliens[n].pos,
&playerShots[i].pos);
if (kmVec3Length(&d) < .7
&& playerShots[i].alive) {
aliens[n].alive = false;
playerShots[i].alive = false;
aliens[n].exploding = true;
resetExposion(aliens[n].explosion);
}
}
}
if (aliens[n].alive != true && aliens[n].exploding != true) {
deadAliens++;
}
}
if (deadAliens == MAX_ALIENS) {
resetAliens();
}
// draw explosions after ALL aliens
for (int n = 0; n < MAX_ALIENS; n++) {
if (aliens[n].exploding==true) {
kmMat4Identity(&model);
kmMat4Translation(&model, aliens[n].pos.x,
aliens[n].pos.y, aliens[n].pos.z);
kmMat4Assign(&mvp, &vp);
kmMat4Multiply(&mvp, &mvp, &model);
glBindTexture(GL_TEXTURE_2D, expTex);
drawPointCloud(aliens[n].explosion, &mvp);
aliens[n].explosion->tick=aliens[n].explosion->tick+0.05;
if (aliens[n].explosion->tick>1.25) {
aliens[n].exploding=false;
} else {
// update the explosion
for (int i=0; i<aliens[n].explosion->totalPoints; i++) {
float t;
t=aliens[n].explosion->tick;
if (i>aliens[n].explosion->totalPoints/2) t=t/2.0;
aliens[n].explosion->pos[i*3]=aliens[n].explosion->vel[i*3] * t;
aliens[n].explosion->pos[i*3+1]=aliens[n].explosion->vel[i*3+1] * t;
aliens[n].explosion->pos[i*3+2]=aliens[n].explosion->vel[i*3+2] * t;
}
}
}
}
// move camera
kmMat4LookAt(&view, &pEye, &pCenter, &pUp);
kmMat4Assign(&vp, &projection);
kmMat4Multiply(&vp, &vp, &view);
kmVec3Subtract(&viewDir,&pEye,&pCenter);
kmVec3Normalize(&viewDir,&viewDir);
// dump values
glPrintf(100, 280, font1,"eye %3.2f %3.2f %3.2f ", pEye.x, pEye.y, pEye.z);
glPrintf(100, 296, font1,"centre %3.2f %3.2f %3.2f ", pCenter.x, pCenter.y,
pCenter.z);
glPrintf(100, 320, font1,"mouse %i,%i %i ", mouse[0], mouse[1], mouse[2]);
glPrintf(100, 340, font1,"frame %i %i ", frame, frame % 20);
swapBuffers();
gettimeofday(&ta, NULL);
long j = (ta.tv_sec * 1e6 + ta.tv_usec);
i = j - i;
if (i < 0)
i = 1000000; // pass through - slower that 60fps
if (i < 16000)
usleep(16000 - i);
// every 10 frames average the time taken and store
// fps value for later printing with glprintf
if (++num_frames % 10 == 0) {
gettimeofday(&t2, NULL);
float dtf =
t2.tv_sec - t1.tv_sec + (t2.tv_usec -
t1.tv_usec) * 1e-6;
lfps = num_frames / dtf;
num_frames = 0;
t1 = t2;
}
}
closeContext();
return 0;
}
