/**
* @brief Creates a new weapon.
*
* @param outfit Outfit which spawns the weapon.
* @param dir Direction of the shooter.
* @param pos Position of the shooter.
* @param vel Velocity of the shooter.
* @param parent Pilot ID of the shooter.
* @param target Target ID that is getting shot.
*/
void weapon_add( const Outfit* outfit, const double dir,
const Vector2d* pos, const Vector2d* vel,
unsigned int parent, unsigned int target )
{
WeaponLayer layer;
Weapon *w;
Weapon **curLayer;
int *mLayer, *nLayer;
GLsizei size;
if (!outfit_isBolt(outfit) &&
!outfit_isAmmo(outfit)) {
ERR("Trying to create a Weapon from a non-Weapon type Outfit");
return;
}
layer = (parent==PLAYER_ID) ? WEAPON_LAYER_FG : WEAPON_LAYER_BG;
w = weapon_create( outfit, dir, pos, vel, parent, target );
/* set the proper layer */
switch (layer) {
case WEAPON_LAYER_BG:
curLayer = wbackLayer;
nLayer = &nwbackLayer;
mLayer = &mwbacklayer;
break;
case WEAPON_LAYER_FG:
curLayer = wfrontLayer;
nLayer = &nwfrontLayer;
mLayer = &mwfrontLayer;
break;
default:
WARN("Unknown weapon layer!");
}
if (*mLayer > *nLayer) /* more memory alloced than needed */
curLayer[(*nLayer)++] = w;
else { /* need to allocate more memory */
switch (layer) {
case WEAPON_LAYER_BG:
(*mLayer) += WEAPON_CHUNK;
curLayer = wbackLayer = realloc(curLayer, (*mLayer)*sizeof(Weapon*));
break;
case WEAPON_LAYER_FG:
(*mLayer) += WEAPON_CHUNK;
curLayer = wfrontLayer = realloc(curLayer, (*mLayer)*sizeof(Weapon*));
break;
}
curLayer[(*nLayer)++] = w;
/* Grow the vertex stuff. */
weapon_vboSize = mwfrontLayer + mwbacklayer;
size = sizeof(GLfloat) * (2+4) * weapon_vboSize;
weapon_vboData = realloc( weapon_vboData, size );
if (weapon_vbo == NULL)
weapon_vbo = gl_vboCreateStream( size, NULL );
}
}
/**
* @brief Initializes the OpenGL rendering routines.
*
* @return 0 on success.
*/
int gl_initRender (void)
{
/* Initialize the VBO. */
gl_renderVBO = gl_vboCreateStream( sizeof(GLfloat) *
OPENGL_RENDER_VBO_SIZE*(2 + 2 + 4), NULL );
gl_renderVBOtexOffset = sizeof(GLfloat) * OPENGL_RENDER_VBO_SIZE*2;
gl_renderVBOcolOffset = sizeof(GLfloat) * OPENGL_RENDER_VBO_SIZE*(2+2);
/* Initialize the circles. */
gl_circle = gl_genCircle( 128 );
return 0;
}
/**
* @brief Initializes the toolkit.
*
* @return 0 on success.
*/
int toolkit_init (void)
{
GLsizei size;
/* Create the VBO. */
toolkit_vboColourOffset = sizeof(GLint) * 2 * 31;
size = (sizeof(GLint)*2 + sizeof(GLfloat)*4) * 31;
toolkit_vbo = gl_vboCreateStream( size, NULL );
/* DIsable the cursor. */
SDL_ShowCursor(SDL_DISABLE);
return 0;
}
/**
* @brief Initilaizes background stars.
*
* @param n Number of stars to add (stars per 800x640 screen).
*/
void background_initStars( int n )
{
unsigned int i;
GLfloat w, h, hw, hh;
double size;
/* Calculate size. */
size = SCREEN_W*SCREEN_H+STAR_BUF*STAR_BUF;
size /= pow2(conf.zoom_far);
/* Calculate star buffer. */
w = (SCREEN_W + 2.*STAR_BUF);
w += conf.zoom_stars * (w / conf.zoom_far - 1.);
h = (SCREEN_H + 2.*STAR_BUF);
h += conf.zoom_stars * (h / conf.zoom_far - 1.);
hw = w / 2.;
hh = h / 2.;
/* Calculate stars. */
size *= n;
nstars = (unsigned int)(size/(800.*600.));
if (mstars < nstars) {
/* Create data. */
star_vertex = realloc( star_vertex, nstars * sizeof(GLfloat) * 4 );
star_colour = realloc( star_colour, nstars * sizeof(GLfloat) * 8 );
mstars = nstars;
}
for (i=0; i < nstars; i++) {
/* Set the position. */
star_vertex[4*i+0] = RNGF()*w - hw;
star_vertex[4*i+1] = RNGF()*h - hh;
star_vertex[4*i+2] = 0.;
star_vertex[4*i+3] = 0.;
/* Set the colour. */
star_colour[8*i+0] = 1.;
star_colour[8*i+1] = 1.;
star_colour[8*i+2] = 1.;
star_colour[8*i+3] = RNGF()*0.6 + 0.2;
star_colour[8*i+4] = 1.;
star_colour[8*i+5] = 1.;
star_colour[8*i+6] = 1.;
star_colour[8*i+7] = 0.;
}
/* Destroy old VBO. */
if (star_vertexVBO != NULL) {
gl_vboDestroy( star_vertexVBO );
star_vertexVBO = NULL;
}
if (star_colourVBO != NULL) {
gl_vboDestroy( star_colourVBO );
star_colourVBO = NULL;
}
/* Create now VBO. */
star_vertexVBO = gl_vboCreateStream(
nstars * sizeof(GLfloat) * 4, star_vertex );
star_colourVBO = gl_vboCreateStatic(
nstars * sizeof(GLfloat) * 8, star_colour );
}
/**
* @brief Initializes the map subsystem.
*
* @return 0 on success.
*/
int map_init (void)
{
/* Create the VBO. */
map_vbo = gl_vboCreateStream( sizeof(GLfloat) * 3*(2+4), NULL );
return 0;
}
/**
* @brief Starts a beam weaapon.
*
* @param outfit Outfit which spawns the weapon.
* @param dir Direction of the shooter.
* @param pos Position of the shooter.
* @param vel Velocity of the shooter.
* @param parent Pilot ID of the shooter.
* @param target Target ID that is getting shot.
* @param mount Mount on the ship.
* @return The identifier of the beam weapon.
*
* @sa beam_end
*/
int beam_start( const Outfit* outfit,
const double dir, const Vector2d* pos, const Vector2d* vel,
const unsigned int parent, const unsigned int target,
const PilotOutfitSlot *mount )
{
WeaponLayer layer;
Weapon *w;
Weapon **curLayer;
int *mLayer, *nLayer;
GLsizei size;
if (!outfit_isBeam(outfit)) {
ERR("Trying to create a Beam Weapon from a non-beam outfit.");
return -1;
}
layer = (parent==PLAYER_ID) ? WEAPON_LAYER_FG : WEAPON_LAYER_BG;
w = weapon_create( outfit, dir, pos, vel, parent, target );
w->ID = ++beam_idgen;
w->mount = mount;
/* set the proper layer */
switch (layer) {
case WEAPON_LAYER_BG:
curLayer = wbackLayer;
nLayer = &nwbackLayer;
mLayer = &mwbacklayer;
break;
case WEAPON_LAYER_FG:
curLayer = wfrontLayer;
nLayer = &nwfrontLayer;
mLayer = &mwfrontLayer;
break;
default:
ERR("Invalid WEAPON_LAYER specified");
return -1;
}
if (*mLayer > *nLayer) /* more memory alloced than needed */
curLayer[(*nLayer)++] = w;
else { /* need to allocate more memory */
switch (layer) {
case WEAPON_LAYER_BG:
(*mLayer) += WEAPON_CHUNK;
curLayer = wbackLayer = realloc(curLayer, (*mLayer)*sizeof(Weapon*));
break;
case WEAPON_LAYER_FG:
(*mLayer) += WEAPON_CHUNK;
curLayer = wfrontLayer = realloc(curLayer, (*mLayer)*sizeof(Weapon*));
break;
}
curLayer[(*nLayer)++] = w;
/* Grow the vertex stuff. */
weapon_vboSize = mwfrontLayer + mwbacklayer;
size = sizeof(GLfloat) * (2+4) * weapon_vboSize;
weapon_vboData = realloc( weapon_vboData, size );
if (weapon_vbo == NULL)
weapon_vbo = gl_vboCreateStream( size, NULL );
}
return w->ID;
}
