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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "FireProjectile.h"
#include "Game/Camera.h"
#include "Game/GlobalUnsynced.h"
#include "Rendering/GlobalRendering.h"
#include "Rendering/Env/Particles/ProjectileDrawer.h"
#include "Rendering/GL/VertexArray.h"
#include "Rendering/Textures/TextureAtlas.h"
#include "Sim/Misc/GlobalSynced.h"
#include "Sim/Misc/QuadField.h"
#include "Sim/Features/Feature.h"
#include "Sim/Misc/DamageArray.h"
#include "Sim/Misc/Wind.h"
#include "Sim/Projectiles/ProjectileHandler.h"
#include "Sim/Units/Unit.h"
#include "System/creg/STL_Deque.h"
CR_BIND_DERIVED(CFireProjectile, CProjectile, )
CR_BIND(CFireProjectile::SubParticle, )
CR_REG_METADATA(CFireProjectile,(
CR_SETFLAG(CF_Synced),
CR_MEMBER(ttl),
CR_MEMBER(emitPos),
CR_MEMBER(emitRadius),
CR_MEMBER(particleTime),
CR_MEMBER(particleSize),
CR_MEMBER(ageSpeed),
CR_MEMBER(subParticles2),
CR_MEMBER(subParticles)
))
CR_REG_METADATA_SUB(CFireProjectile, SubParticle, (
CR_MEMBER(pos),
CR_MEMBER(posDif),
CR_MEMBER(age),
CR_MEMBER(maxSize),
CR_MEMBER(rotSpeed),
CR_MEMBER(smokeType)
))
CFireProjectile::CFireProjectile(
const float3& pos,
const float3& spd,
CUnit* owner,
int emitTtl,
int particleTtl,
float emitRadius,
float particleSize
):
// these are synced, but neither weapon nor piece
// (only burning features create instances of them)
CProjectile(pos, speed, owner, true, false, false),
ttl(emitTtl),
emitPos(pos),
emitRadius(emitRadius),
particleTime(particleTtl),
particleSize(particleSize)
{
drawRadius = emitRadius + particleTime * speed.w;
checkCol = false;
ageSpeed = 1.0f / particleTime;
SetPosition(pos + (UpVector * particleTime * speed.w * 0.5f));
alwaysVisible = true;
castShadow = true;
}
void CFireProjectile::Update()
{
ttl--;
if (ttl > 0) {
const float partSat = (gs->frameNum & 1) ? 1.0f : 0.8f;
if (projectileHandler->GetParticleSaturation() < partSat) {
// unsynced code
SubParticle sub;
sub.age = 0;
sub.maxSize = (0.7f + guRNG.NextFloat()*0.3f) * particleSize;
sub.posDif = guRNG.NextVector() * emitRadius;
sub.pos = emitPos;
sub.pos.y += sub.posDif.y;
sub.posDif.y = 0;
sub.rotSpeed = (guRNG.NextFloat() - 0.5f) * 4;
sub.smokeType = guRNG.NextInt(projectileDrawer->smoketex.size());
subParticles.push_front(sub);
sub.maxSize = (0.7f + guRNG.NextFloat()*0.3f) * particleSize;
sub.posDif = guRNG.NextVector() * emitRadius;
sub.pos = emitPos;
sub.pos.y += sub.posDif.y - radius*0.3f;
sub.posDif.y = 0;
sub.rotSpeed=(guRNG.NextFloat() - 0.5f) * 4;
subParticles2.push_front(sub);
}
if (!(ttl & 31)) {
// copy on purpose, since the below can call Lua
QuadFieldQuery qfQuery;
quadField->GetFeaturesExact(qfQuery, emitPos + wind.GetCurrentWind() * 0.7f, emitRadius * 2);
quadField->GetUnitsExact(qfQuery, emitPos + wind.GetCurrentWind() * 0.7f, emitRadius * 2);
for (CFeature* f: *qfQuery.features) {
if (gsRNG.NextFloat() > 0.8f) {
f->StartFire();
}
}
const DamageArray fireDmg(30);
for (CUnit* u: *qfQuery.units) {
u->DoDamage(fireDmg, ZeroVector, NULL, -CSolidObject::DAMAGE_EXTSOURCE_FIRE, -1);
}
}
}
for (SubParticle& pi: subParticles) {
if ((pi.age += ageSpeed) > 1.0f) {
subParticles.pop_back();
break;
}
pi.pos += (speed + wind.GetCurrentWind() * pi.age * 0.05f + pi.posDif * 0.1f);
pi.posDif *= 0.9f;
}
for (SubParticle& pi: subParticles2) {
if ((pi.age += (ageSpeed * 1.5f)) > 1.0f) {
subParticles2.pop_back();
break;
}
pi.pos += (speed * 0.7f + pi.posDif * 0.1f);
pi.posDif *= 0.9f;
}
deleteMe |= (ttl <= -particleTime);
}
void CFireProjectile::Draw(CVertexArray* va)
{
unsigned char col[4];
col[3] = 1;
unsigned char col2[4];
size_t sz2 = subParticles2.size();
size_t sz = subParticles.size();
va->EnlargeArrays(sz2 * 4 + sz * 8, 0, VA_SIZE_TC);
for (const SubParticle& pi: subParticles2) {
const float age = pi.age + ageSpeed * globalRendering->timeOffset;
const float size = pi.maxSize * age;
const float rot = pi.rotSpeed * age;
const float sinRot = fastmath::sin(rot);
const float cosRot = fastmath::cos(rot);
float3 dir1 = (camera->GetRight()*cosRot + camera->GetUp()*sinRot) * size;
float3 dir2 = (camera->GetRight()*sinRot - camera->GetUp()*cosRot) * size;
float3 interPos = pi.pos;
col[0] = (unsigned char) ((1 - age) * 255);
col[1] = (unsigned char) ((1 - age) * 255);
col[2] = (unsigned char) ((1 - age) * 255);
va->AddVertexQTC(interPos - dir1 - dir2, projectileDrawer->explotex->xstart, projectileDrawer->explotex->ystart, col);
va->AddVertexQTC(interPos + dir1 - dir2, projectileDrawer->explotex->xend, projectileDrawer->explotex->ystart, col);
va->AddVertexQTC(interPos + dir1 + dir2, projectileDrawer->explotex->xend, projectileDrawer->explotex->yend, col);
va->AddVertexQTC(interPos - dir1 + dir2, projectileDrawer->explotex->xstart, projectileDrawer->explotex->yend, col);
}
for (const SubParticle& pi: subParticles) {
const AtlasedTexture* at = projectileDrawer->smoketex[pi.smokeType];
const float age = pi.age + ageSpeed * globalRendering->timeOffset;
const float size = pi.maxSize * fastmath::apxsqrt(age);
const float rot = pi.rotSpeed * age;
const float sinRot = fastmath::sin(rot);
const float cosRot = fastmath::cos(rot);
float3 dir1 = (camera->GetRight()*cosRot + camera->GetUp()*sinRot) * size;
float3 dir2 = (camera->GetRight()*sinRot - camera->GetUp()*cosRot) * size;
float3 interPos = pi.pos;
if (age < 1/1.31f) {
col[0] = (unsigned char) ((1 - age * 1.3f) * 255);
col[1] = (unsigned char) ((1 - age * 1.3f) * 255);
col[2] = (unsigned char) ((1 - age * 1.3f) * 255);
col[3] = 1;
va->AddVertexQTC(interPos - dir1 - dir2, projectileDrawer->explotex->xstart, projectileDrawer->explotex->ystart, col);
va->AddVertexQTC(interPos + dir1 - dir2, projectileDrawer->explotex->xend, projectileDrawer->explotex->ystart, col);
va->AddVertexQTC(interPos + dir1 + dir2, projectileDrawer->explotex->xend, projectileDrawer->explotex->yend, col);
va->AddVertexQTC(interPos - dir1 + dir2, projectileDrawer->explotex->xstart, projectileDrawer->explotex->yend, col);
}
unsigned char c;
if (age < 0.5f) {
c = (unsigned char) (age * 510);
} else {
c = (unsigned char) (510 - (age * 510));
}
col2[0] = (unsigned char) (c * 0.6f);
col2[1] = (unsigned char) (c * 0.6f);
col2[2] = (unsigned char) (c * 0.6f);
col2[3] = c;
va->AddVertexQTC(interPos - dir1 - dir2, at->xstart, at->ystart, col2);
va->AddVertexQTC(interPos + dir1 - dir2, at->xend, at->ystart, col2);
va->AddVertexQTC(interPos + dir1 + dir2, at->xend, at->yend, col2);
va->AddVertexQTC(interPos - dir1 + dir2, at->xstart, at->yend, col2);
}
}
int CFireProjectile::GetProjectilesCount() const
{
return subParticles2.size() + subParticles.size() * 2;
}
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