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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "FireBallProjectile.h"
#include "Game/Camera.h"
#include "Game/GlobalUnsynced.h"
#include "Rendering/GL/RenderDataBuffer.hpp"
#include "Rendering/Textures/TextureAtlas.h"
#include "Rendering/Env/Particles/ProjectileDrawer.h"
#include "Sim/Projectiles/ExplosionGenerator.h"
#include "Sim/Weapons/WeaponDef.h"
#include "System/SpringMath.h"
CR_BIND_DERIVED(CFireBallProjectile, CWeaponProjectile, )
CR_REG_METADATA(CFireBallProjectile,(
CR_SETFLAG(CF_Synced),
CR_MEMBER(sparks),
CR_MEMBER(numSparks)
))
CR_BIND(CFireBallProjectile::Spark, )
CR_REG_METADATA_SUB(CFireBallProjectile, Spark, (
CR_MEMBER(pos),
CR_MEMBER(speed),
CR_MEMBER(size),
CR_MEMBER(ttl)
))
CFireBallProjectile::CFireBallProjectile(const ProjectileParams& params): CWeaponProjectile(params)
{
projectileType = WEAPON_FIREBALL_PROJECTILE;
if (weaponDef != nullptr) {
SetRadiusAndHeight(weaponDef->collisionSize, 0.0f);
drawRadius = weaponDef->size;
}
}
void CFireBallProjectile::Draw(GL::RenderDataBufferTC* va) const
{
unsigned char col[4] = {255, 150, 100, 1};
const float3 interPos = mix(pos, drawPos, checkCol);
const float size = radius * 1.3f;
const unsigned int numFire = std::min(10u, numSparks);
const unsigned int maxCol = mix(numFire, 10u, checkCol);
for (unsigned int i = 0; i < numSparks; i++) {
col[0] = (numSparks - i) * 12;
col[1] = (numSparks - i) * 6;
col[2] = (numSparks - i) * 4;
#define ept projectileDrawer->explotex
va->SafeAppend({sparks[i].pos - camera->GetRight() * sparks[i].size - camera->GetUp() * sparks[i].size, ept->xstart, ept->ystart, col});
va->SafeAppend({sparks[i].pos + camera->GetRight() * sparks[i].size - camera->GetUp() * sparks[i].size, ept->xend, ept->ystart, col});
va->SafeAppend({sparks[i].pos + camera->GetRight() * sparks[i].size + camera->GetUp() * sparks[i].size, ept->xend, ept->yend, col});
va->SafeAppend({sparks[i].pos + camera->GetRight() * sparks[i].size + camera->GetUp() * sparks[i].size, ept->xend, ept->yend, col});
va->SafeAppend({sparks[i].pos - camera->GetRight() * sparks[i].size + camera->GetUp() * sparks[i].size, ept->xstart, ept->yend, col});
va->SafeAppend({sparks[i].pos - camera->GetRight() * sparks[i].size - camera->GetUp() * sparks[i].size, ept->xstart, ept->ystart, col});
#undef ept
}
for (unsigned int i = 0; i < numFire; i++) {
col[0] = (maxCol - i) * 25;
col[1] = (maxCol - i) * 15;
col[2] = (maxCol - i) * 10;
#define dgt projectileDrawer->dguntex
va->SafeAppend({interPos - (speed * 0.5f * i) - camera->GetRight() * size - camera->GetUp() * size, dgt->xstart, dgt->ystart, col});
va->SafeAppend({interPos - (speed * 0.5f * i) + camera->GetRight() * size - camera->GetUp() * size, dgt->xend , dgt->ystart, col});
va->SafeAppend({interPos - (speed * 0.5f * i) + camera->GetRight() * size + camera->GetUp() * size, dgt->xend , dgt->yend, col});
va->SafeAppend({interPos - (speed * 0.5f * i) + camera->GetRight() * size + camera->GetUp() * size, dgt->xend , dgt->yend, col});
va->SafeAppend({interPos - (speed * 0.5f * i) - camera->GetRight() * size + camera->GetUp() * size, dgt->xstart, dgt->yend, col});
va->SafeAppend({interPos - (speed * 0.5f * i) - camera->GetRight() * size - camera->GetUp() * size, dgt->xstart, dgt->ystart, col});
#undef dgt
}
}
void CFireBallProjectile::Update()
{
if (checkCol) {
pos += (speed * (1 - luaMoveCtrl));
speed.y += (mygravity * weaponDef->gravityAffected * (1 - luaMoveCtrl));
checkCol = !(weaponDef->noExplode && TraveledRange());
EmitSpark();
} else {
deleteMe |= (numSparks == 0);
}
TickSparks();
UpdateGroundBounce();
UpdateInterception();
}
void CFireBallProjectile::EmitSpark()
{
constexpr unsigned int maxSparks = sizeof(sparks) / sizeof(sparks[0]);
if (numSparks == maxSparks)
return;
Spark& spark = sparks[numSparks++];
const float x = guRNG.NextFloat() - 0.5f;
const float y = guRNG.NextFloat() - 0.5f;
const float z = guRNG.NextFloat() - 0.5f;
spark.speed = (speed * 0.95f) + float3(x, y, z);
spark.pos = pos - speed * (guRNG.NextFloat() + 3.0f) + spark.speed * 3.0f;
spark.size = 5.0f;
spark.ttl = maxSparks;
}
void CFireBallProjectile::TickSparks()
{
for (unsigned int i = 0; i < numSparks; ) {
if ((--sparks[i].ttl) <= 0) {
sparks[i] = sparks[--numSparks];
continue;
}
sparks[i].pos += (sparks[i].speed * checkCol);
sparks[i].speed *= 0.95f;
i++;
}
explGenHandler.GenExplosion(cegID, pos, speed, ttl, (numSparks > 0)? sparks[0].size: 0.0f, 0.0f, nullptr, nullptr);
}
void CFireBallProjectile::Collision()
{
CWeaponProjectile::Collision();
deleteMe = false;
}
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