/**
* @brief Starts the rendering engine.
*/
static void gl_fontRenderStart( const glFontStash* font, double x, double y, const glColour *c )
{
double a;
/* Enable textures. */
glEnable(GL_TEXTURE_2D);
/* Set up matrix. */
gl_matrixMode(GL_MODELVIEW);
gl_matrixPush();
gl_matrixTranslate( round(x), round(y) );
/* Handle colour. */
if (font_restoreLast) {
a = (c==NULL) ? 1. : c->a;
ACOLOUR(*font_lastCol,a);
}
else {
if (c==NULL)
glColor4d( 1., 1., 1., 1. );
else
COLOUR(*c);
}
font_restoreLast = 0;
/* Activate the appropriate VBOs. */
gl_vboActivateOffset( font->vbo_tex, GL_TEXTURE_COORD_ARRAY, 0, 2, GL_FLOAT, 0 );
gl_vboActivateOffset( font->vbo_vert, GL_VERTEX_ARRAY, 0, 2, GL_SHORT, 0 );
}
/**
* @brief Renders a character.
*/
static int gl_fontRenderGlyph( glFontStash* stsh, uint32_t ch, const glColour *c, int state )
{
GLushort ind[6];
double a;
const glColour *col;
int vbo_id;
/* Handle escape sequences. */
if (ch == '\a') {/* Start sequence. */
return 1;
}
if (state == 1) {
col = gl_fontGetColour( ch );
a = (c==NULL) ? 1. : c->a;
if (col == NULL) {
if (c==NULL)
glColor4d( 1., 1., 1., 1. );
else
COLOUR(*c);
}
else
ACOLOUR(*col,a);
font_lastCol = col;
return 0;
}
/* Unicode goes here.
* First try to find the glyph. */
glFontGlyph *glyph;
glyph = gl_fontGetGlyph( stsh, ch );
if (glyph == NULL) {
WARN(_("Unable to find glyph '%d'!"), ch );
return -1;
}
/* Activate texture. */
glBindTexture(GL_TEXTURE_2D, glyph->tex->id);
/* VBO indices. */
vbo_id = glyph->vbo_id;
ind[0] = vbo_id + 0;
ind[1] = vbo_id + 1;
ind[2] = vbo_id + 3;
ind[3] = vbo_id + 1;
ind[4] = vbo_id + 3;
ind[5] = vbo_id + 2;
/* Draw the element. */
glDrawElements( GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, ind );
/* Translate matrix. */
gl_matrixTranslate( glyph->adv_x, glyph->adv_y );
return 0;
}
/**
* @brief Renders an individual weapon.
*
* @param w Weapon to render.
* @param dt Current delta tick.
*/
static void weapon_render( Weapon* w, const double dt )
{
double x,y, cx,cy, gx,gy;
glTexture *gfx;
double z;
glColour c = { .r=1., .g=1., .b=1. };
switch (w->outfit->type) {
/* Weapons that use sprites. */
case OUTFIT_TYPE_AMMO:
case OUTFIT_TYPE_TURRET_AMMO:
case OUTFIT_TYPE_BOLT:
case OUTFIT_TYPE_TURRET_BOLT:
gfx = outfit_gfx(w->outfit);
/* Alpha based on strength. */
c.a = w->strength;
/* Outfit spins around. */
if (outfit_isProp(w->outfit, OUTFIT_PROP_WEAP_SPIN)) {
/* Check timer. */
w->anim -= dt;
if (w->anim < 0.) {
w->anim = outfit_spin(w->outfit);
/* Increment sprite. */
w->sprite++;
if (w->sprite >= gfx->sx*gfx->sy)
w->sprite = 0;
}
/* Render. */
if (outfit_isBolt(w->outfit) && w->outfit->u.blt.gfx_end)
gl_blitSpriteInterpolate( gfx, w->outfit->u.blt.gfx_end,
w->timer / w->life,
w->solid->pos.x, w->solid->pos.y,
w->sprite % (int)gfx->sx, w->sprite / (int)gfx->sx, &c );
else
gl_blitSprite( gfx, w->solid->pos.x, w->solid->pos.y,
w->sprite % (int)gfx->sx, w->sprite / (int)gfx->sx, &c );
}
/* Outfit faces direction. */
else {
if (outfit_isBolt(w->outfit) && w->outfit->u.blt.gfx_end)
gl_blitSpriteInterpolate( gfx, w->outfit->u.blt.gfx_end,
w->timer / w->life,
w->solid->pos.x, w->solid->pos.y, w->sx, w->sy, &c );
else
gl_blitSprite( gfx, w->solid->pos.x, w->solid->pos.y, w->sx, w->sy, &c );
}
break;
/* Beam weapons. */
case OUTFIT_TYPE_BEAM:
case OUTFIT_TYPE_TURRET_BEAM:
gfx = outfit_gfx(w->outfit);
/* Zoom. */
gl_cameraZoomGet( &z );
/* Position. */
gl_cameraGet( &cx, &cy );
gui_getOffset( &gx, &gy );
x = (w->solid->pos.x - cx)*z + gx;
y = (w->solid->pos.y - cy)*z + gy;
/* Set up the matrix. */
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glTranslated( x, y, 0. );
glRotated( 270. + w->solid->dir / M_PI * 180., 0., 0., 1. );
/* Preparatives. */
glEnable(GL_TEXTURE_2D);
glBindTexture( GL_TEXTURE_2D, gfx->texture);
glShadeModel(GL_SMOOTH);
/* Actual rendering. */
glBegin(GL_QUAD_STRIP);
/* Start faded. */
ACOLOUR(cWhite, 0.);
glTexCoord2d( w->anim, 0. );
glVertex2d( -gfx->sh/2.*z, 0. );
glTexCoord2d( w->anim, 1. );
glVertex2d( +gfx->sh/2.*z, 0. );
/* Full strength. */
COLOUR(cWhite);
glTexCoord2d( w->anim + 10. / gfx->sw, 0. );
glVertex2d( -gfx->sh/2.*z, 10.*z );
glTexCoord2d( w->anim + 10. / gfx->sw, 1. );
glVertex2d( +gfx->sh/2.*z, 10.*z );
glTexCoord2d( w->anim + 0.8*w->outfit->u.bem.range / gfx->sw, 0. );
glVertex2d( -gfx->sh/2.*z, 0.8*w->outfit->u.bem.range*z );
glTexCoord2d( w->anim + 0.8*w->outfit->u.bem.range / gfx->sw, 1. );
glVertex2d( +gfx->sh/2.*z, 0.8*w->outfit->u.bem.range*z );
/* Fades out. */
ACOLOUR(cWhite, 0.);
glTexCoord2d( w->anim + w->outfit->u.bem.range / gfx->sw, 0. );
glVertex2d( -gfx->sh/2.*z, w->outfit->u.bem.range*z );
glTexCoord2d( w->anim + w->outfit->u.bem.range / gfx->sw, 1. );
glVertex2d( +gfx->sh/2.*z, w->outfit->u.bem.range*z );
glEnd(); /* GL_QUAD_STRIP */
/* Do the beam movement. */
w->anim -= 5. * dt;
if (w->anim <= -gfx->sw)
w->anim += gfx->sw;
/* Clean up. */
glDisable(GL_TEXTURE_2D);
glShadeModel(GL_FLAT);
glPopMatrix(); /* GL_PROJECTION */
gl_checkErr();
break;
default:
WARN("Weapon of type '%s' has no render implemented yet!",
w->outfit->name);
break;
}
}
/**
* @brief Checks to see if the weapon can hit the pilot.
*
* @param w Weapon to check if hits pilot.
* @param p Pilot to check if is hit by weapon.
* @return 1 if can be hit, 0 if can't.
*/
static int weapon_checkCanHit( Weapon* w, Pilot *p )
{
Pilot *parent;
/* Can't hit invincible stuff. */
if (pilot_isFlag(p, PILOT_INVINCIBLE))
return 0;
/* Can never hit same faction. */
if (p->faction == w->faction)
return 0;
/* Go "through" dead pilots. */
if (pilot_isFlag(p, PILOT_DEAD))
return 0;
/* Player behaves differently. */
if (w->faction == FACTION_PLAYER) {
/* Always hit without safety. */
if (!weapon_safety)
return 1;
/* Always hit target. */
else if (w->target == p->id)
return 1;
/* Always hit hostiles. */
else if (pilot_isFlag(p, PILOT_HOSTILE))
return 1;
/* Always hit unbribed enemies. */
else if (!pilot_isFlag(p, PILOT_BRIBED) &&
areEnemies(w->faction, p->faction))
return 1;
/* Miss rest - can be neutral/ally. */
else
return 0;
}
/* Let hostiles hit player. */
if (p->faction == FACTION_PLAYER) {
parent = pilot_get(w->parent);
if (parent != NULL) {
if (pilot_isFlag(parent, PILOT_BRIBED))
return 0;
if (pilot_isFlag(parent, PILOT_HOSTILE))
return 1;
}
}
/* Hit non-allies. */
if (areEnemies(w->faction, p->faction))
return 1;
return 0;
}
/**
* @brief Renders the custom map widget.
*
* @param bx Base X position to render at.
* @param by Base Y position to render at.
* @param w Width of the widget.
* @param h Height of the widget.
*/
static void map_render( double bx, double by, double w, double h )
{
int i,j, n,m;
double x,y,r, tx,ty;
StarSystem *sys, *jsys, *hsys;
glColour* col;
r = 5.;
x = (bx - map_xpos + w/2) * 1.;
y = (by - map_ypos + h/2) * 1.;
/* background */
COLOUR(cBlack);
glBegin(GL_QUADS);
glVertex2d( bx, by );
glVertex2d( bx, by+h );
glVertex2d( bx+w, by+h );
glVertex2d( bx+w, by );
glEnd(); /* GL_QUADS */
/* render the star systems */
for (i=0; i<systems_nstack; i++) {
sys = system_getIndex( i );
/* check to make sure system is known or adjacent to known (or marked) */
if (!sys_isFlag(sys, SYSTEM_MARKED | SYSTEM_CMARKED) && !space_sysReachable(sys))
continue;
/* system colours */
if (sys==cur_system) col = &cRadar_tPlanet;
else if (!sys_isKnown(sys) || (sys->nplanets==0)) col = &cInert;
else col = faction_getColour( sys->faction);
COLOUR(*col);
/* draw the system */
tx = x + sys->pos.x*map_zoom;
ty = y + sys->pos.y*map_zoom;
gl_drawCircleInRect( tx, ty, r, bx, by, w, h );
/* draw the system name */
if (sys_isKnown(sys) && (map_zoom > 0.5 )) {
tx = x + 7. + sys->pos.x * map_zoom;
ty = y - 5. + sys->pos.y * map_zoom;
gl_print( &gl_smallFont,
tx + SCREEN_W/2., ty + SCREEN_H/2.,
&cWhite, sys->name );
}
if (!sys_isKnown(sys)) continue; /* we don't draw hyperspace lines */
/* draw the hyperspace paths */
glShadeModel(GL_SMOOTH);
/* cheaply use transparency instead of actually calculating
* from where to where the line must go :) */
for (j=0; j<sys->njumps; j++) {
jsys = system_getIndex( sys->jumps[j] );
if (hyperspace_target != -1)
hsys = system_getIndex( cur_system->jumps[hyperspace_target] );
n = map_inPath(jsys);
m = map_inPath(sys);
/* set the colours */
/* is the route the current one? */
if ((hyperspace_target != -1) &&
( ((cur_system==sys) && (j==hyperspace_target)) ||
((cur_system==jsys) &&
(sys==hsys )))) {
if (player->fuel < HYPERSPACE_FUEL)
col = &cRed;
else
col = &cGreen;
}
/* is the route part of the path? */
else if ((n > 0) && (m > 0)) {
if ((n == 2) || (m == 2)) /* out of fuel */
col = &cRed;
else
col = &cYellow;
}
else
col = &cDarkBlue;
glBegin(GL_LINE_STRIP);
ACOLOUR(*col,0.);
tx = x + sys->pos.x * map_zoom;
ty = y + sys->pos.y * map_zoom;
glVertex2d( tx, ty );
COLOUR(*col);
tx += (jsys->pos.x - sys->pos.x)/2. * map_zoom;
ty += (jsys->pos.y - sys->pos.y)/2. * map_zoom;
glVertex2d( tx, ty );
ACOLOUR(*col,0.);
tx = x + jsys->pos.x * map_zoom;
ty = y + jsys->pos.y * map_zoom;
glVertex2d( tx, ty );
glEnd(); /* GL_LINE_STRIP */
}
glShadeModel(GL_FLAT);
}
/* Second pass to put markers. */
for (i=0; i<systems_nstack; i++) {
sys = system_getIndex( i );
/* We only care about marked now. */
if (!sys_isFlag(sys, SYSTEM_MARKED | SYSTEM_CMARKED))
continue;
/* Get the position. */
tx = x + sys->pos.x*map_zoom;
ty = y + sys->pos.y*map_zoom;
/* Count markers. */
n = (sys_isFlag(sys, SYSTEM_CMARKED)) ? 1 : 0;
n += sys->markers_misc;
n += sys->markers_cargo;
n += sys->markers_rush;
/* Draw the markers. */
j = 0;
if (sys_isFlag(sys, SYSTEM_CMARKED)) {
map_drawMarker( tx, ty, r, n, j, 0 );
j++;
}
for (m=0; m<sys->markers_misc; m++) {
map_drawMarker( tx, ty, r, n, j, 1 );
j++;
}
for (m=0; m<sys->markers_rush; m++) {
map_drawMarker( tx, ty, r, n, j, 2 );
j++;
}
for (m=0; m<sys->markers_cargo; m++) {
map_drawMarker( tx, ty, r, n, j, 3 );
j++;
}
}
/* selected planet */
if (map_selected != -1) {
sys = system_getIndex( map_selected );
COLOUR(cRed);
gl_drawCircleInRect( x + sys->pos.x * map_zoom, y + sys->pos.y * map_zoom,
r+3., bx, by, w, h );
}
}
