/**
* @brief Prepares the rendering for the special effects.
*
* Should be called at the beginning of the rendering loop.
*
* @param dt Current delta tick.
* @param real_dt Real delta tick.
*/
void spfx_begin( const double dt, const double real_dt )
{
double ddt;
/* Defaults. */
shake_set = 0;
if (shake_off)
return;
#if SDL_VERSION_ATLEAST(1,3,0)
/* Decrement the haptic timer. */
if (haptic_lastUpdate > 0.)
haptic_lastUpdate -= real_dt; /* Based on real delta-tick. */
#else /* SDL_VERSION_ATLEAST(1,3,0) */
(void) real_dt; /* Avoid warning. */
#endif /* SDL_VERSION_ATLEAST(1,3,0) */
/* Micro basic simple control loop. */
if (dt > shake_fps_min) {
ddt = dt;
while (ddt > shake_fps_min) {
spfx_updateShake( shake_fps_min );
ddt -= shake_fps_min;
}
spfx_updateShake( ddt ); /* Leftover. */
}
else
spfx_updateShake( dt );
/* set the new viewport */
gl_matrixTranslate( shake_pos.x, shake_pos.y );
shake_set = 1;
}
/**
* @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 Sets the opengl viewport.
*/
void gl_viewport( int x, int y, int w, int h )
{
gl_matrixMode(GL_PROJECTION);
gl_matrixIdentity();
gl_matrixOrtho( 0., /* Left edge. */
gl_screen.nw, /* Right edge. */
0., /* Bottom edge. */
gl_screen.nh, /* Top edge. */
-1., /* near */
1. ); /* far */
/* Take into account possible translation. */
gl_screen.x = x;
gl_screen.y = y;
gl_matrixTranslate( x, y );
/* Set screen size. */
gl_screen.w = w;
gl_screen.h = h;
/* Take into account possible scaling. */
if (gl_screen.scale != 1.)
gl_matrixScale( gl_screen.wscale, gl_screen.hscale );
}
/**
* @brief Renders the nebula overlay (hides what player can't see).
*
* @param dt Current delta tick.
*/
void nebu_renderOverlay( const double dt )
{
(void) dt;
double gx, gy;
double ox, oy;
double z;
double sx, sy;
/* Get GUI offsets. */
gui_getOffset( &gx, &gy );
/* Get zoom. */
z = cam_getZoom();
/*
* Renders the puffs
*/
nebu_renderPuffs( 0 );
/* Prepare the matrix */
ox = gx;
oy = gy;
spfx_getShake( &sx, &sy );
ox += sx;
oy += sy;
gl_matrixPush();
gl_matrixTranslate( SCREEN_W/2.+ox, SCREEN_H/2.+oy );
gl_matrixScale( z, z );
/*
* Mask for area player can still see (partially)
*/
glShadeModel(GL_SMOOTH);
gl_vboActivateOffset( nebu_vboOverlay, GL_VERTEX_ARRAY, 0, 2, GL_FLOAT, 0 );
gl_vboActivateOffset( nebu_vboOverlay, GL_COLOR_ARRAY,
sizeof(GLfloat)*2*18, 4, GL_FLOAT, 0 );
glDrawArrays( GL_TRIANGLE_FAN, 0, 18 );
/*
* Solid nebula for areas the player can't see
*/
glShadeModel(GL_FLAT);
/* Colour is shared. */
gl_vboActivateOffset( nebu_vboOverlay, GL_COLOR_ARRAY,
sizeof(GLfloat)*((2+4)*18 + 2*28), 4, GL_FLOAT, 0 );
/* Top left. */
gl_vboActivateOffset( nebu_vboOverlay, GL_VERTEX_ARRAY,
sizeof(GLfloat)*((2+4)*18 + 0*2*7), 2, GL_FLOAT, 0 );
glDrawArrays( GL_TRIANGLE_FAN, 0, 7 );
/* Top right. */
gl_vboActivateOffset( nebu_vboOverlay, GL_VERTEX_ARRAY,
sizeof(GLfloat)*((2+4)*18 + 1*2*7), 2, GL_FLOAT, 0 );
glDrawArrays( GL_TRIANGLE_FAN, 0, 7 );
/* Bottom right. */
gl_vboActivateOffset( nebu_vboOverlay, GL_VERTEX_ARRAY,
sizeof(GLfloat)*((2+4)*18 + 2*2*7), 2, GL_FLOAT, 0 );
glDrawArrays( GL_TRIANGLE_FAN, 0, 7 );
/* Bottom left. */
gl_vboActivateOffset( nebu_vboOverlay, GL_VERTEX_ARRAY,
sizeof(GLfloat)*((2+4)*18 + 3*2*7), 2, GL_FLOAT, 0 );
glDrawArrays( GL_TRIANGLE_FAN, 0, 7 );
gl_vboDeactivate();
gl_matrixPop();
/* Reset puff movement. */
puff_x = 0.;
puff_y = 0.;
gl_checkErr();
}
/**
* @brief Renders the nebula using the multitexture approach.
*
* @param dt Current delta tick.
*/
static void nebu_renderMultitexture( const double dt )
{
GLfloat col[4];
int temp;
double sx, sy;
/* calculate frame to draw */
nebu_timer -= dt;
if (nebu_timer < 0.) { /* Time to change. */
temp = cur_nebu[0] - cur_nebu[1];
cur_nebu[1] = cur_nebu[0];
cur_nebu[0] += temp;
if (cur_nebu[0] >= NEBULA_Z)
cur_nebu[0] = cur_nebu[1] - 1;
else if (cur_nebu[0] < 0)
cur_nebu[0] = cur_nebu[1] + 1;
/* Change timer. */
nebu_timer += nebu_dt;
/* Case it hasn't rendered in a while so it doesn't go crazy. */
if (nebu_timer < 0)
nebu_timer = nebu_dt;
}
/* Set the colour */
col[0] = cBlue.r;
col[1] = cBlue.g;
col[2] = cBlue.b;
col[3] = (nebu_dt - nebu_timer) / nebu_dt;
/* Set up the targets */
/* Texture 0 */
nglActiveTexture( GL_TEXTURE0 );
glEnable(GL_TEXTURE_2D);
glBindTexture( GL_TEXTURE_2D, nebu_textures[cur_nebu[1]]);
glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE );
/* Texture 1 */
nglActiveTexture( GL_TEXTURE1 );
glEnable(GL_TEXTURE_2D);
glBindTexture( GL_TEXTURE_2D, nebu_textures[cur_nebu[0]]);
/* Prepare it */
glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_REPLACE );
glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_INTERPOLATE );
/* Colour */
glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, col );
/* Arguments */
/* Arg0 */
glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_CONSTANT );
glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR );
glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_TEXTURE );
glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA );
/* Arg1 */
glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_ALPHA, GL_PREVIOUS );
glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA );
/* Arg2 */
glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE2_ALPHA, GL_CONSTANT );
glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND2_ALPHA, GL_SRC_ALPHA );
/* Compensate possible rumble */
spfx_getShake( &sx, &sy );
gl_matrixPush();
gl_matrixTranslate( -sx, -sy );
/* Now render! */
gl_vboActivateOffset( nebu_vboBG, GL_VERTEX_ARRAY,
sizeof(GL_FLOAT) * 0*2*4, 2, GL_FLOAT, 0 );
gl_vboActivateOffset( nebu_vboBG, GL_TEXTURE0,
sizeof(GL_FLOAT) * 1*2*4, 2, GL_FLOAT, 0 );
gl_vboActivateOffset( nebu_vboBG, GL_TEXTURE1,
sizeof(GL_FLOAT) * 2*2*4, 2, GL_FLOAT, 0 );
glDrawArrays( GL_TRIANGLE_STRIP, 0, 4 );
gl_vboDeactivate();
gl_matrixPop();
/* Set values to defaults */
glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
glDisable(GL_TEXTURE_2D);
nglActiveTexture( GL_TEXTURE0 );
glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
glDisable(GL_TEXTURE_2D);
/* Anything failed? */
gl_checkErr();
}
/**
* @brief Renders the starry background.
*
* @param dt Current delta tick.
*/
void background_renderStars( const double dt )
{
(void) dt;
unsigned int i;
GLfloat hh, hw, h, w;
GLfloat x, y, m, b;
GLfloat brightness;
double z;
double sx, sy;
int shade_mode;
int j, n;
/*
* gprof claims it's the slowest thing in the game!
*/
/* Do some scaling for now. */
z = cam_getZoom();
z = 1. * (1. - conf.zoom_stars) + z * conf.zoom_stars;
gl_matrixPush();
gl_matrixTranslate( SCREEN_W/2., SCREEN_H/2. );
gl_matrixScale( z, z );
if (!paused && (player.p != NULL) && !player_isFlag(PLAYER_DESTROYED) &&
!player_isFlag(PLAYER_CREATING)) { /* update position */
/* Calculate some dimensions. */
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.;
if ((star_x > SCREEN_W) || (star_y > SCREEN_H)) {
sx = ceil( star_x / SCREEN_W );
sy = ceil( star_y / SCREEN_H );
n = MAX( sx, sy );
star_x /= (double)n;
star_y /= (double)n;
}
else
n = 1;
/* Calculate new star positions. */
for (j=0; j < n; j++) {
for (i=0; i < nstars; i++) {
/* calculate new position */
b = 1./(9. - 10.*star_colour[8*i+3]);
star_vertex[4*i+0] = star_vertex[4*i+0] + star_x*b;
star_vertex[4*i+1] = star_vertex[4*i+1] + star_y*b;
/* check boundaries */
if (star_vertex[4*i+0] > hw)
star_vertex[4*i+0] -= w;
else if (star_vertex[4*i+0] < -hw)
star_vertex[4*i+0] += w;
if (star_vertex[4*i+1] > hh)
star_vertex[4*i+1] -= h;
else if (star_vertex[4*i+1] < -hh)
star_vertex[4*i+1] += h;
}
}
/* Upload the data. */
gl_vboSubData( star_vertexVBO, 0, nstars * 4 * sizeof(GLfloat), star_vertex );
}
/* Decide on shade mode. */
shade_mode = 0;
if ((player.p != NULL) && !player_isFlag(PLAYER_DESTROYED) &&
!player_isFlag(PLAYER_CREATING)) {
if (pilot_isFlag(player.p,PILOT_HYPERSPACE) && /* hyperspace fancy effects */
(player.p->ptimer < HYPERSPACE_STARS_BLUR)) {
glShadeModel(GL_SMOOTH);
shade_mode = 1;
/* lines will be based on velocity */
m = HYPERSPACE_STARS_BLUR-player.p->ptimer;
m /= HYPERSPACE_STARS_BLUR;
m *= HYPERSPACE_STARS_LENGTH;
x = m*cos(VANGLE(player.p->solid->vel));
y = m*sin(VANGLE(player.p->solid->vel));
}
else if (dt_mod > 3.) {
glShadeModel(GL_SMOOTH);
shade_mode = 1;
/* lines will be based on velocity */
m = (dt_mod-3.)*VMOD(player.p->solid->vel)/10.;
x = m*cos(VANGLE(player.p->solid->vel));
y = m*sin(VANGLE(player.p->solid->vel));
}
if (shade_mode) {
/* Generate lines. */
for (i=0; i < nstars; i++) {
brightness = star_colour[8*i+3];
star_vertex[4*i+2] = star_vertex[4*i+0] + x*brightness;
star_vertex[4*i+3] = star_vertex[4*i+1] + y*brightness;
}
/* Upload new data. */
gl_vboSubData( star_vertexVBO, 0, nstars * 4 * sizeof(GLfloat), star_vertex );
}
}
/* Render. */
gl_vboActivate( star_vertexVBO, GL_VERTEX_ARRAY, 2, GL_FLOAT, 2 * sizeof(GLfloat) );
gl_vboActivate( star_colourVBO, GL_COLOR_ARRAY, 4, GL_FLOAT, 4 * sizeof(GLfloat) );
if (shade_mode) {
glDrawArrays( GL_LINES, 0, nstars );
glDrawArrays( GL_POINTS, 0, nstars ); /* This second pass is when the lines are very short that they "lose" intensity. */
glShadeModel(GL_FLAT);
}
else {
glDrawArrays( GL_POINTS, 0, nstars );
}
/* Clear star movement. */
star_x = 0.;
star_y = 0.;
/* Disable vertex array. */
gl_vboDeactivate();
/* Pop matrix. */
gl_matrixPop();
/* Check for errors. */
gl_checkErr();
}
/**
* @brief Renders the overlay map.
*
* @param dt Current delta tick.
*/
void ovr_render( double dt )
{
(void) dt;
int i, j;
Pilot **pstk;
int n;
double w, h, res;
double x,y;
glColour c = { .r=0., .g=0., .b=0., .a=0.5 };
/* Must be open. */
if (!ovr_open)
return;
/* Player must be alive. */
if (player_isFlag( PLAYER_DESTROYED ) || (player.p == NULL))
return;
/* Default values. */
w = SCREEN_W;
h = SCREEN_H;
res = ovr_res;
/* First render the background overlay. */
gl_renderRect( 0., 0., w, h, &c );
/* We need to center in the image first. */
gl_matrixPush();
gl_matrixTranslate( w/2., h/2. );
/* Render planets. */
for (i=0; i<cur_system->nplanets; i++)
if ((cur_system->planets[ i ]->real == ASSET_REAL) && (i != player.p->nav_planet))
gui_renderPlanet( i, RADAR_RECT, w, h, res, 1 );
if (player.p->nav_planet > -1)
gui_renderPlanet( player.p->nav_planet, RADAR_RECT, w, h, res, 1 );
/* Render jump points. */
for (i=0; i<cur_system->njumps; i++)
if (i != player.p->nav_hyperspace)
gui_renderJumpPoint( i, RADAR_RECT, w, h, res, 1 );
if (player.p->nav_hyperspace > -1)
gui_renderJumpPoint( player.p->nav_hyperspace, RADAR_RECT, w, h, res, 1 );
/* Render pilots. */
pstk = pilot_getAll( &n );
j = 0;
for (i=0; i<n; i++) {
if (pstk[i]->id == PLAYER_ID) /* Skip player. */
continue;
if (pstk[i]->id == player.p->target)
j = i;
else
gui_renderPilot( pstk[i], RADAR_RECT, w, h, res, 1 );
}
/* Render the targetted pilot */
if (j!=0)
gui_renderPilot( pstk[j], RADAR_RECT, w, h, res, 1 );
/* Check if player has goto target. */
if (player_isFlag(PLAYER_AUTONAV) && (player.autonav == AUTONAV_POS_APPROACH)) {
x = player.autonav_pos.x / res;
y = player.autonav_pos.y / res;
gl_renderCross( x, y, 5., &cRadar_hilight );
gl_printRaw( &gl_smallFont, x+10., y-gl_smallFont.h/2., &cRadar_hilight, "GOTO" );
}
/* Render the player. */
gui_renderPlayer( res, 1 );
/* Render markers. */
ovr_mrkRenderAll( res );
/* Pop the matrix. */
gl_matrixPop();
}
/**
* @brief Renders all the markers.
*
* @param res Resolution to render at.
*/
static void ovr_mrkRenderAll( double res )
{
int i;
ovr_marker_t *mrk;
double x, y;
if (ovr_markers == NULL)
return;
for (i=0; i<array_size(ovr_markers); i++) {
mrk = &ovr_markers[i];
x = mrk->u.pt.x / res;
y = mrk->u.pt.y / res;
gl_renderCross( x, y, 5., &cRadar_hilight );
if (mrk->text != NULL)
gl_printRaw( &gl_smallFont, x+10., y-gl_smallFont.h/2., &cRadar_hilight, mrk->text );
}
}
