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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "System/mmgr.h"
#include "Game/Camera.h"
#include "GenericParticleProjectile.h"
#include "Rendering/GL/VertexArray.h"
#include "Rendering/Textures/ColorMap.h"
#include "Sim/Projectiles/ProjectileHandler.h"
CR_BIND_DERIVED(CGenericParticleProjectile, CProjectile, (ZeroVector, ZeroVector, NULL));
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),
CR_RESERVED(8)
));
CGenericParticleProjectile::CGenericParticleProjectile(const float3& pos, const float3& speed, CUnit* owner)
: 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;
}
CGenericParticleProjectile::~CGenericParticleProjectile()
{
}
void CGenericParticleProjectile::Update()
{
pos += speed;
life += decayrate;
speed += gravity;
speed *= airdrag;
size = size * sizeMod + sizeGrowth;
if (life > 1.0f) {
deleteMe = true;
}
}
void CGenericParticleProjectile::Draw()
{
inArray = true;
if (directional) {
float3 dif(pos-camera->pos);
dif.ANormalize();
float3 dir1(dif.cross(speed));
dir1.ANormalize();
float3 dir2(dif.cross(dir1));
unsigned char color[4];
colorMap->GetColor(color, life);
va->AddVertexTC(drawPos - dir1 * size - dir2 * size, texture->xstart, texture->ystart, color);
va->AddVertexTC(drawPos - dir1 * size + dir2 * size, texture->xend, texture->ystart, color);
va->AddVertexTC(drawPos + dir1 * size + dir2 * size, texture->xend, texture->yend, color);
va->AddVertexTC(drawPos + dir1 * size - dir2 * size, texture->xstart, texture->yend, color);
} else {
unsigned char color[4];
colorMap->GetColor(color, life);
va->AddVertexTC(drawPos - camera->right * size - camera->up * size, texture->xstart, texture->ystart, color);
va->AddVertexTC(drawPos + camera->right * size - camera->up * size, texture->xend, texture->ystart, color);
va->AddVertexTC(drawPos + camera->right * size + camera->up * size, texture->xend, texture->yend, color);
va->AddVertexTC(drawPos - camera->right * size + camera->up * size, texture->xstart, texture->yend, color);
}
}
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