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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "Game/Camera.h"
#include "GenericParticleProjectile.h"
#include "Rendering/GL/VertexArray.h"
#include "Rendering/Textures/ColorMap.h"
#include "Sim/Projectiles/ProjectileHandler.h"
#include "Sim/Projectiles/ProjectileMemPool.h"
CR_BIND_DERIVED_POOL(CGenericParticleProjectile, CProjectile, , projMemPool.alloc, projMemPool.free)
CR_REG_METADATA(CGenericParticleProjectile,(
CR_MEMBER(gravity),
CR_MEMBER(texture),
CR_MEMBER(colorMap),
CR_MEMBER(directional),
CR_MEMBER(life),
CR_MEMBER(decayrate),
CR_MEMBER(size),
CR_MEMBER(airdrag),
CR_MEMBER(sizeGrowth),
CR_MEMBER(sizeMod)
))
CGenericParticleProjectile::CGenericParticleProjectile(const CUnit* owner, const float3& pos, const float3& speed)
: CProjectile(pos, speed, owner, false, false, false)
, gravity(ZeroVector)
, texture(NULL)
, colorMap(NULL)
, directional(false)
, life(0.0f)
, decayrate(0.0f)
, size(0.0f)
, airdrag(0.0f)
, sizeGrowth(0.0f)
, sizeMod(0.0f)
{
// set fields from super-classes
useAirLos = true;
checkCol = false;
deleteMe = false;
}
void CGenericParticleProjectile::Update()
{
SetPosition(pos + speed);
SetVelocityAndSpeed((speed + gravity) * airdrag);
life += decayrate;
size = size * sizeMod + sizeGrowth;
deleteMe |= (life > 1.0f);
}
void CGenericParticleProjectile::Draw(CVertexArray* va)
{
float3 dir1 = camera->GetRight();
float3 dir2 = camera->GetUp();
if (directional) {
float3 dif(pos - camera->GetPos());
dif.ANormalize();
dir1 = dif.cross(speed).ANormalize();
dir2 = dif.cross(dir1);
}
unsigned char color[4];
colorMap->GetColor(color, life);
va->AddVertexTC(drawPos + (-dir1 - dir2) * size, texture->xstart, texture->ystart, color);
va->AddVertexTC(drawPos + (-dir1 + dir2) * size, texture->xend, texture->ystart, color);
va->AddVertexTC(drawPos + ( dir1 + dir2) * size, texture->xend, texture->yend, color);
va->AddVertexTC(drawPos + ( dir1 - dir2) * size, texture->xstart, texture->yend, color);
}
int CGenericParticleProjectile::GetProjectilesCount() const
{
return 1;
}
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