/**
* @brief Check rain particle visibility
* @details Check the snowflake is visible and still going, wrapping if necessary.
*/
static qboolean CG_SnowParticleCheckVisible(cg_atmosphericParticle_t *particle)
{
float moved;
vec2_t distance;
if (!particle || particle->active == ACT_NOT)
{
return qfalse;
}
// units moved since last frame
moved = (cg.time - cg_atmFx.lastRainTime) * 0.001;
VectorMA(particle->pos, moved, particle->delta, particle->pos);
if (particle->pos[2] < BG_GetSkyGroundHeightAtPoint(particle->pos))
{
return CG_SetParticleActive(particle, ACT_NOT);
}
distance[0] = particle->pos[0] - cg.refdef_current->vieworg[0];
distance[1] = particle->pos[1] - cg.refdef_current->vieworg[1];
if ((distance[0] * distance[0] + distance[1] * distance[1]) > Square(MAX_ATMOSPHERIC_DISTANCE))
{
// just nuke this particle, let it respawn
return CG_SetParticleActive(particle, ACT_NOT);
}
return qtrue;
}
static qboolean CG_SnowParticleCheckVisible(cg_atmosphericParticle_t *particle)
{
// Check the snowflake is visible and still going, wrapping if necessary.
float moved;
vec2_t distance;
//int msec = trap_Milliseconds();
//n_checkvisibletime++;
if (!particle || particle->active == ACT_NOT)
{
// checkvisibletime += trap_Milliseconds() - msec;
return(qfalse);
}
moved = (cg.time - cg_atmFx.lastRainTime) * 0.001; // Units moved since last frame
VectorMA(particle->pos, moved, particle->delta, particle->pos);
if (particle->pos[2] < BG_GetSkyGroundHeightAtPoint(particle->pos))
{
//checkvisibletime += trap_Milliseconds() - msec;
return CG_SetParticleActive(particle, ACT_NOT);
}
distance[0] = particle->pos[0] - cg.refdef_current->vieworg[0];
distance[1] = particle->pos[1] - cg.refdef_current->vieworg[1];
if ((distance[0] * distance[0] + distance[1] * distance[1]) > Square(MAX_ATMOSPHERIC_DISTANCE))
{
// just nuke this particle, let it respawn
return CG_SetParticleActive(particle, ACT_NOT);
}
//checkvisibletime += trap_Milliseconds() - msec;
return(qtrue);
}
/**
* @brief Generate rain particle
* @details Attempt to 'spot' a raindrop somewhere below a sky texture.
*/
static qboolean CG_RainParticleGenerate(cg_atmosphericParticle_t *particle, vec3_t currvec, float currweight)
{
float angle = random() * 2 * M_PI, distance = 20 + MAX_ATMOSPHERIC_DISTANCE * random();
float groundHeight, skyHeight;
particle->pos[0] = cg.refdef_current->vieworg[0] + sin(angle) * distance;
particle->pos[1] = cg.refdef_current->vieworg[1] + cos(angle) * distance;
// choose a spawn point randomly between sky and ground
skyHeight = BG_GetSkyHeightAtPoint(particle->pos);
if (skyHeight >= MAX_ATMOSPHERIC_HEIGHT)
{
return qfalse;
}
groundHeight = BG_GetSkyGroundHeightAtPoint(particle->pos);
if (groundHeight + particle->height + ATMOSPHERIC_PARTICLE_OFFSET >= skyHeight)
{
return qfalse;
}
particle->pos[2] = groundHeight + random() * (skyHeight - groundHeight);
// make sure it doesn't fall from too far cause it then will go over our heads ('lower the ceiling')
if (cg_atmFx.baseHeightOffset > 0)
{
if (particle->pos[2] - cg.refdef_current->vieworg[2] > cg_atmFx.baseHeightOffset)
{
particle->pos[2] = cg.refdef_current->vieworg[2] + cg_atmFx.baseHeightOffset;
if (particle->pos[2] < groundHeight)
{
return qfalse;
}
}
}
// rain goes in bursts - allow max raindrops every 10 seconds
if (cg_atmFx.oldDropsActive > (0.50 * cg_atmFx.numDrops + 0.001 * cg_atmFx.numDrops * (10000 - (cg.time % 10000))))
{
return qfalse;
}
CG_SetParticleActive(particle, ACT_FALLING);
particle->colour[0] = 0.6 + 0.2 * random() * 0xFF;
particle->colour[1] = 0.6 + 0.2 * random() * 0xFF;
particle->colour[2] = 0.6 + 0.2 * random() * 0xFF;
VectorCopy(currvec, particle->delta);
particle->delta[2] += crandom() * 100;
VectorCopy(particle->delta, particle->deltaNormalized);
VectorNormalizeFast(particle->deltaNormalized);
particle->height = ATMOSPHERIC_RAIN_HEIGHT + crandom() * 100;
particle->weight = currweight;
particle->effectshader = &cg_atmFx.effectshaders[0];
//particle->effectshader = &cg_atmFx.effectshaders[ (int) (random() * ( cg_atmFx.numEffectShaders - 1 )) ];
return qtrue;
}
static qboolean CG_SnowParticleGenerate( cg_atmosphericParticle_t *particle, vec3_t currvec, float currweight ) {
// Attempt to 'spot' a snowflake somewhere below a sky texture.
float angle, distance;
float groundHeight, skyHeight;
// int msec = trap_Milliseconds();
// n_generatetime++;
angle = random() * 2 * M_PI;
distance = 20 + MAX_ATMOSPHERIC_DISTANCE * random();
particle->pos[0] = cg.refdef.vieworg[0] + sin( angle ) * distance;
particle->pos[1] = cg.refdef.vieworg[1] + cos( angle ) * distance;
// ydnar: choose a spawn point randomly between sky and ground
skyHeight = BG_GetSkyHeightAtPoint( particle->pos );
if ( skyHeight == MAX_ATMOSPHERIC_HEIGHT ) {
return qfalse;
}
groundHeight = BG_GetSkyGroundHeightAtPoint( particle->pos );
if ( groundHeight >= skyHeight ) {
return qfalse;
}
particle->pos[2] = groundHeight + random() * ( skyHeight - groundHeight );
// make sure it doesn't fall from too far cause it then will go over our heads ('lower the ceiling')
if ( cg_atmFx.baseHeightOffset > 0 ) {
if ( particle->pos[2] - cg.refdef.vieworg[2] > cg_atmFx.baseHeightOffset ) {
particle->pos[2] = cg.refdef.vieworg[2] + cg_atmFx.baseHeightOffset;
if ( particle->pos[2] < groundHeight ) {
return qfalse;
}
}
}
CG_SetParticleActive( particle, ACT_FALLING );
VectorCopy( currvec, particle->delta );
particle->delta[2] += crandom() * 25;
VectorCopy( particle->delta, particle->deltaNormalized );
VectorNormalizeFast( particle->deltaNormalized );
particle->height = ATMOSPHERIC_SNOW_HEIGHT + random() * 2;
particle->weight = particle->height * 0.5f;
if (cg_atmFx.numEffectShaders > 1) {
particle->effectshader = &cg_atmFx.effectshaders[ rand()%cg_atmFx.numEffectShaders ];
} else {
particle->effectshader = &cg_atmFx.effectshaders[0];
}
// generatetime += trap_Milliseconds() - msec;
return( qtrue );
}
/**
* @brief Generate a snowflake
* @details Attempt to 'spot' a snowflake somewhere below a sky texture.
*/
static qboolean CG_SnowParticleGenerate(cg_atmosphericParticle_t *particle, vec3_t currvec, float currweight)
{
float angle = random() * 2 * M_PI, distance = 20 + MAX_ATMOSPHERIC_DISTANCE * random();
float groundHeight, skyHeight;
particle->pos[0] = cg.refdef_current->vieworg[0] + sin(angle) * distance;
particle->pos[1] = cg.refdef_current->vieworg[1] + cos(angle) * distance;
// choose a spawn point randomly between sky and ground
skyHeight = BG_GetSkyHeightAtPoint(particle->pos);
if (skyHeight >= MAX_ATMOSPHERIC_HEIGHT)
{
return qfalse;
}
groundHeight = BG_GetSkyGroundHeightAtPoint(particle->pos);
if (groundHeight + particle->height + ATMOSPHERIC_PARTICLE_OFFSET >= skyHeight)
{
return qfalse;
}
particle->pos[2] = groundHeight + random() * (skyHeight - groundHeight);
// make sure it doesn't fall from too far cause it then will go over our heads ('lower the ceiling')
if (cg_atmFx.baseHeightOffset > 0)
{
if (particle->pos[2] - cg.refdef_current->vieworg[2] > cg_atmFx.baseHeightOffset)
{
particle->pos[2] = cg.refdef_current->vieworg[2] + cg_atmFx.baseHeightOffset;
if (particle->pos[2] < groundHeight)
{
return qfalse;
}
}
}
CG_SetParticleActive(particle, ACT_FALLING);
VectorCopy(currvec, particle->delta);
particle->delta[2] += crandom() * 25;
VectorCopy(particle->delta, particle->deltaNormalized);
VectorNormalizeFast(particle->deltaNormalized);
particle->height = ATMOSPHERIC_SNOW_HEIGHT + random() * 2;
particle->weight = particle->height * 0.5f;
particle->effectshader = &cg_atmFx.effectshaders[0];
//particle->effectshader = &cg_atmFx.effectshaders[ (int) (random() * ( cg_atmFx.numEffectShaders - 1 )) ];
return qtrue;
}
static qboolean CG_SnowParticleCheckVisible( cg_atmosphericParticle_t *particle )
{
// Check the snowflake is visible and still going, wrapping if necessary.
float moved;
vec2_t distance;
// int msec = trap_Milliseconds();
// n_checkvisibletime++;
if( !particle || particle->active == ACT_NOT ) {
// checkvisibletime += trap_Milliseconds() - msec;
return( qfalse );
}
moved = (cg.time - cg_atmFx.lastRainTime) * 0.001; // Units moved since last frame
VectorMA( particle->pos, moved, particle->delta, particle->pos );
if( particle->pos[2] < BG_GetSkyGroundHeightAtPoint( particle->pos ) ) {
// checkvisibletime += trap_Milliseconds() - msec;
return CG_SetParticleActive( particle, ACT_NOT );
}
distance[0] = particle->pos[0] - cg.refdef_current->vieworg[0];
distance[1] = particle->pos[1] - cg.refdef_current->vieworg[1];
if( (distance[0] * distance[0] + distance[1] * distance[1]) > Square( MAX_ATMOSPHERIC_DISTANCE ) )
{
// ydnar: just nuke this particle, let it respawn
return CG_SetParticleActive( particle, ACT_NOT );
/*
// Attempt to respot the particle at our other side
particle->pos[0] -= 1.85f * distance[0];
particle->pos[1] -= 1.85f * distance[1];
// ydnar: place particle in random position between ground and sky
groundHeight = BG_GetSkyGroundHeightAtPoint( particle->pos );
skyHeight = BG_GetSkyHeightAtPoint( particle->pos );
if( skyHeight == MAX_ATMOSPHERIC_HEIGHT )
return CG_SetParticleActive( particle, ACT_NOT );
particle->pos[ 2 ] = groundHeight + random() * (skyHeight - groundHeight);
// ydnar: valid spot?
if( particle->pos[ 2 ] <= groundHeight || particle->pos[ 2 ] >= skyHeight )
return CG_SetParticleActive( particle, ACT_NOT );
*/
}
// checkvisibletime += trap_Milliseconds() - msec;
return( qtrue );
}
static qboolean CG_RainParticleCheckVisible( cg_atmosphericParticle_t *particle )
{
// Check the raindrop is visible and still going, wrapping if necessary.
float moved;
vec2_t distance;
// int msec = trap_Milliseconds();
if( !particle || particle->active == ACT_NOT ) {
// checkvisibletime += trap_Milliseconds() - msec;
return( qfalse );
}
moved = (cg.time - cg_atmFx.lastRainTime) * 0.001; // Units moved since last frame
VectorMA( particle->pos, moved, particle->delta, particle->pos );
if( particle->pos[2] + particle->height < BG_GetSkyGroundHeightAtPoint( particle->pos ) ) {
// checkvisibletime += trap_Milliseconds() - msec;
return CG_SetParticleActive( particle, ACT_NOT );
}
distance[0] = particle->pos[0] - cg.refdef_current->vieworg[0];
distance[1] = particle->pos[1] - cg.refdef_current->vieworg[1];
if( (distance[0] * distance[0] + distance[1] * distance[1]) > Square( MAX_ATMOSPHERIC_DISTANCE ) )
{
// ydnar: just nuke this particle, let it respawn
return CG_SetParticleActive( particle, ACT_NOT );
/*
// Attempt to respot the particle at our other side
particle->pos[0] -= 1.85f * distance[0];
particle->pos[1] -= 1.85f * distance[1];
// Valid spot?
pointHeight = BG_GetSkyHeightAtPoint( particle->pos );
if( pointHeight == MAX_ATMOSPHERIC_HEIGHT ) {
// checkvisibletime += trap_Milliseconds() - msec;
return CG_SetParticleActive( particle, ACT_NOT );
}
pointHeight = BG_GetSkyGroundHeightAtPoint( particle->pos );
if( pointHeight == MAX_ATMOSPHERIC_HEIGHT || pointHeight >= particle->pos[2] ) {
// checkvisibletime += trap_Milliseconds() - msec;
return CG_SetParticleActive( particle, ACT_NOT );
}
*/
}
// checkvisibletime += trap_Milliseconds() - msec;
return( qtrue );
}
/**
* @brief Draw a snowflake
* @details Render a snow particle.
*/
static void CG_SnowParticleRender(cg_atmosphericParticle_t *particle)
{
vec3_t forward, right;
polyVert_t verts[3];
vec2_t line;
float len, sinTumbling, cosTumbling, particleWidth, dist;
vec3_t start, finish;
float groundHeight;
if (particle->active == ACT_NOT)
{
return;
}
if (CG_CullPoint(particle->pos))
{
return;
}
VectorCopy(particle->pos, start);
sinTumbling = sin(particle->pos[2] * 0.03125f * (0.5f * particle->weight));
cosTumbling = cos((particle->pos[2] + particle->pos[1]) * 0.03125f * (0.5f * particle->weight));
start[0] += 24 * (1 - particle->deltaNormalized[2]) * sinTumbling;
start[1] += 24 * (1 - particle->deltaNormalized[2]) * cosTumbling;
// make sure it doesn't clip through surfaces
groundHeight = BG_GetSkyGroundHeightAtPoint(start);
len = particle->height;
if (start[2] - len - ATMOSPHERIC_PARTICLE_OFFSET <= groundHeight)
{
return;
// stop snow going through surfaces
//len = particle->height - groundHeight + start[2];
//VectorMA(start, len - particle->height, particle->deltaNormalized, start);
}
if (len <= 0)
{
return;
}
line[0] = particle->pos[0] - cg.refdef_current->vieworg[0];
line[1] = particle->pos[1] - cg.refdef_current->vieworg[1];
dist = DistanceSquared(particle->pos, cg.refdef_current->vieworg);
// dist becomes scale
if (dist > Square(500.f))
{
dist = 1.f + ((dist - Square(500.f)) * (10.f / Square(2000.f)));
}
else
{
dist = 1.f;
}
len *= dist;
VectorCopy(particle->deltaNormalized, forward);
VectorMA(start, -(len /* sinTumbling */), forward, finish);
line[0] = DotProduct(forward, cg.refdef_current->viewaxis[1]);
line[1] = DotProduct(forward, cg.refdef_current->viewaxis[2]);
VectorScale(cg.refdef_current->viewaxis[1], line[1], right);
VectorMA(right, -line[0], cg.refdef_current->viewaxis[2], right);
VectorNormalize(right);
particleWidth = dist * (/* cosTumbling */ particle->weight);
VectorMA(finish, -particleWidth, right, verts[0].xyz);
verts[0].st[0] = 0;
verts[0].st[1] = 0;
verts[0].modulate[0] = 255;
verts[0].modulate[1] = 255;
verts[0].modulate[2] = 255;
verts[0].modulate[3] = 255;
VectorMA(start, -particleWidth, right, verts[1].xyz);
verts[1].st[0] = 0;
verts[1].st[1] = 1;
verts[1].modulate[0] = 255;
verts[1].modulate[1] = 255;
verts[1].modulate[2] = 255;
verts[1].modulate[3] = 255;
VectorMA(start, particleWidth, right, verts[2].xyz);
verts[2].st[0] = 1;
verts[2].st[1] = 1;
verts[2].modulate[0] = 255;
verts[2].modulate[1] = 255;
verts[2].modulate[2] = 255;
verts[2].modulate[3] = 255;
CG_AddPolyToPool(*particle->effectshader, verts);
}
/**
* @brief Draw a raindrop
* @details Render a rain particle.
*/
static void CG_RainParticleRender(cg_atmosphericParticle_t *particle)
{
vec3_t forward, right;
polyVert_t verts[3];
vec2_t line;
float len, dist;
vec3_t start, finish;
float groundHeight;
if (particle->active == ACT_NOT)
{
return;
}
if (CG_CullPoint(particle->pos))
{
return;
}
VectorCopy(particle->pos, start);
dist = DistanceSquared(particle->pos, cg.refdef_current->vieworg);
// make sure it doesn't clip through surfaces
groundHeight = BG_GetSkyGroundHeightAtPoint(start);
len = particle->height;
if (start[2] - ATMOSPHERIC_PARTICLE_OFFSET <= groundHeight)
{
// stop rain going through surfaces
len = particle->height - groundHeight + start[2];
VectorMA(start, len - particle->height, particle->deltaNormalized, start);
}
if (len <= 0)
{
return;
}
// fade nearby rain particles
if (dist < Square(128.f))
{
dist = .25f + .75f * (dist / Square(128.f));
}
else
{
dist = 1.0f;
}
VectorCopy(particle->deltaNormalized, forward);
VectorMA(start, -len, forward, finish);
line[0] = DotProduct(forward, cg.refdef_current->viewaxis[1]);
line[1] = DotProduct(forward, cg.refdef_current->viewaxis[2]);
VectorScale(cg.refdef_current->viewaxis[1], line[1], right);
VectorMA(right, -line[0], cg.refdef_current->viewaxis[2], right);
VectorNormalize(right);
VectorCopy(finish, verts[0].xyz);
verts[0].st[0] = 0.5f;
verts[0].st[1] = 0;
verts[0].modulate[0] = particle->colour[0];
verts[0].modulate[1] = particle->colour[1];
verts[0].modulate[2] = particle->colour[2];
verts[0].modulate[3] = 100 * dist;
VectorMA(start, -particle->weight, right, verts[1].xyz);
verts[1].st[0] = 0;
verts[1].st[1] = 1;
verts[1].modulate[0] = particle->colour[0];
verts[1].modulate[1] = particle->colour[1];
verts[2].modulate[2] = particle->colour[2];
verts[1].modulate[3] = 200 * dist;
VectorMA(start, particle->weight, right, verts[2].xyz);
verts[2].st[0] = 1;
verts[2].st[1] = 1;
verts[2].modulate[0] = particle->colour[0];
verts[2].modulate[1] = particle->colour[1];
verts[2].modulate[2] = particle->colour[2];
verts[2].modulate[3] = 200 * dist;
CG_AddPolyToPool(*particle->effectshader, verts);
}
static void CG_RainParticleRender( cg_atmosphericParticle_t *particle )
{
// Draw a raindrop
vec3_t forward, right;
polyVert_t verts[3];
vec2_t line;
float len, frac, dist;
vec3_t start, finish;
float groundHeight;
// int msec = trap_Milliseconds();
// n_rendertime++;
if( particle->active == ACT_NOT ) {
// rendertime += trap_Milliseconds() - msec;
return;
}
if( CG_CullPoint( particle->pos ) ) {
return;
}
VectorCopy( particle->pos, start );
dist = DistanceSquared( particle->pos, cg.refdef_current->vieworg );
// Make sure it doesn't clip through surfaces
groundHeight = BG_GetSkyGroundHeightAtPoint( start );
len = particle->height;
if( start[2] <= groundHeight ) {
// Stop snow going through surfaces.
len = particle->height - groundHeight + start[2];
frac = start[2];
VectorMA( start, len - particle->height, particle->deltaNormalized, start );
}
if( len <= 0 ) {
// rendertime += trap_Milliseconds() - msec;
return;
}
// fade nearby rain particles
if( dist < Square( 128.f ) )
dist = .25f + .75f * ( dist / Square( 128.f ) );
else
dist = 1.0f;
VectorCopy( particle->deltaNormalized, forward );
VectorMA( start, -len, forward, finish );
line[0] = DotProduct( forward, cg.refdef_current->viewaxis[1] );
line[1] = DotProduct( forward, cg.refdef_current->viewaxis[2] );
VectorScale( cg.refdef_current->viewaxis[1], line[1], right );
VectorMA( right, -line[0], cg.refdef_current->viewaxis[2], right );
VectorNormalize( right );
// dist = 1.0;
VectorCopy( finish, verts[0].xyz );
verts[0].st[0] = 0.5f;
verts[0].st[1] = 0;
verts[0].modulate[0] = particle->colour[0];
verts[0].modulate[1] = particle->colour[1];
verts[0].modulate[2] = particle->colour[2];
verts[0].modulate[3] = 100 * dist;
VectorMA( start, -particle->weight, right, verts[1].xyz );
verts[1].st[0] = 0;
verts[1].st[1] = 1;
verts[1].modulate[0] = particle->colour[0];
verts[1].modulate[1] = particle->colour[1];
verts[2].modulate[2] = particle->colour[2];
verts[1].modulate[3] = 200 * dist;
VectorMA( start, particle->weight, right, verts[2].xyz );
verts[2].st[0] = 1;
verts[2].st[1] = 1;
verts[2].modulate[0] = particle->colour[0];
verts[2].modulate[1] = particle->colour[1];
verts[2].modulate[2] = particle->colour[2];
verts[2].modulate[3] = 200 * dist;
CG_AddPolyToPool( *particle->effectshader, verts );
// rendertime += trap_Milliseconds() - msec;
}
static qboolean CG_RainParticleGenerate( cg_atmosphericParticle_t *particle, vec3_t currvec, float currweight )
{
// Attempt to 'spot' a raindrop somewhere below a sky texture.
float angle, distance;
float groundHeight, skyHeight;
// int msec = trap_Milliseconds();
// n_generatetime++;
angle = random() * 2*M_PI;
distance = 20 + MAX_ATMOSPHERIC_DISTANCE * random();
particle->pos[0] = cg.refdef_current->vieworg[0] + sin(angle) * distance;
particle->pos[1] = cg.refdef_current->vieworg[1] + cos(angle) * distance;
// ydnar: choose a spawn point randomly between sky and ground
skyHeight = BG_GetSkyHeightAtPoint( particle->pos );
if( skyHeight == MAX_ATMOSPHERIC_HEIGHT )
return qfalse;
groundHeight = BG_GetSkyGroundHeightAtPoint( particle->pos );
if( groundHeight >= skyHeight )
return qfalse;
particle->pos[2] = groundHeight + random() * (skyHeight - groundHeight);
// make sure it doesn't fall from too far cause it then will go over our heads ('lower the ceiling')
if( cg_atmFx.baseHeightOffset > 0 ) {
if( particle->pos[2] - cg.refdef_current->vieworg[2] > cg_atmFx.baseHeightOffset ) {
particle->pos[2] = cg.refdef_current->vieworg[2] + cg_atmFx.baseHeightOffset;
if( particle->pos[2] < groundHeight ) {
return qfalse;
}
}
}
// ydnar: rain goes in bursts
{
float maxActiveDrops;
// every 10 seconds allow max raindrops
maxActiveDrops = 0.50 * cg_atmFx.numDrops + 0.001 * cg_atmFx.numDrops * (10000 - (cg.time % 10000));
if( cg_atmFx.oldDropsActive > maxActiveDrops )
return qfalse;
}
CG_SetParticleActive( particle, ACT_FALLING );
particle->colour[0] = 0.6 + 0.2 * random() * 0xFF;
particle->colour[1] = 0.6 + 0.2 * random() * 0xFF;
particle->colour[2] = 0.6 + 0.2 * random() * 0xFF;
VectorCopy( currvec, particle->delta );
particle->delta[2] += crandom() * 100;
VectorCopy( particle->delta, particle->deltaNormalized );
VectorNormalizeFast( particle->deltaNormalized );
particle->height = ATMOSPHERIC_RAIN_HEIGHT + crandom() * 100;
particle->weight = currweight;
particle->effectshader = &cg_atmFx.effectshaders[0];
// particle->effectshader = &cg_atmFx.effectshaders[ (int) (random() * ( cg_atmFx.numEffectShaders - 1 )) ];
// generatetime += trap_Milliseconds() - msec;
return( qtrue );
}
