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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "System/mmgr.h"
#include "ExploSpikeProjectile.h"
#include "Game/Camera.h"
#include "Game/GlobalUnsynced.h"
#include "Rendering/GlobalRendering.h"
#include "Rendering/ProjectileDrawer.h"
#include "Rendering/GL/VertexArray.h"
#include "Rendering/Textures/TextureAtlas.h"
CR_BIND_DERIVED(CExploSpikeProjectile, CProjectile, );
CR_REG_METADATA(CExploSpikeProjectile,
(
CR_MEMBER_BEGINFLAG(CM_Config),
CR_MEMBER(length),
CR_MEMBER(width),
CR_MEMBER(alpha),
CR_MEMBER(alphaDecay),
CR_MEMBER(lengthGrowth),
CR_MEMBER(dir),
CR_MEMBER(color),
CR_MEMBER_ENDFLAG(CM_Config),
CR_RESERVED(8)
));
CExploSpikeProjectile::CExploSpikeProjectile()
: CProjectile()
, length(0.0f)
, width(0.0f)
, alpha(0.0f)
, alphaDecay(0.0f)
, lengthGrowth(0.0f)
, dir(ZeroVector)
, color(1.0f, 0.8f, 0.5f)
{
}
CExploSpikeProjectile::CExploSpikeProjectile(const float3& pos, const float3& speed, float length, float width, float alpha, float alphaDecay, CUnit* owner):
CProjectile(pos, speed, owner, false, false, false),
length(length),
width(width),
alpha(alpha),
alphaDecay(alphaDecay),
dir(speed),
color(1.0f, 0.8f, 0.5f)
{
lengthGrowth = dir.Length() * (0.5f + gu->usRandFloat() * 0.4f);
dir /= lengthGrowth;
checkCol = false;
useAirLos = true;
SetRadiusAndHeight(length + lengthGrowth * alpha / alphaDecay, 0.0f);
}
CExploSpikeProjectile::~CExploSpikeProjectile()
{
}
void CExploSpikeProjectile::Update()
{
pos += speed;
length += lengthGrowth;
alpha -= alphaDecay;
if (alpha <= 0) {
alpha = 0;
deleteMe = true;
}
}
void CExploSpikeProjectile::Draw()
{
inArray = true;
const float3 dif = (pos - camera->pos).ANormalize();
const float3 dir2 = (dif.cross(dir)).ANormalize();
unsigned char col[4];
const float a = std::max(0.0f, alpha-alphaDecay * globalRendering->timeOffset) * 255;
col[0] = (unsigned char)(a * color.x);
col[1] = (unsigned char)(a * color.y);
col[2] = (unsigned char)(a * color.z);
col[3] = 1;
const float3 l = (dir * length) + (lengthGrowth * globalRendering->timeOffset);
const float3 w = dir2 * width;
#define let projectileDrawer->laserendtex
va->AddVertexTC(drawPos + l + w, let->xend, let->yend, col);
va->AddVertexTC(drawPos + l - w, let->xend, let->ystart, col);
va->AddVertexTC(drawPos - l - w, let->xstart, let->ystart, col);
va->AddVertexTC(drawPos - l + w, let->xstart, let->yend, col);
#undef let
}
void CExploSpikeProjectile::Init(const float3& pos, CUnit* owner)
{
CProjectile::Init(pos, owner);
lengthGrowth = dir.Length() * (0.5f + gu->usRandFloat() * 0.4f);
dir /= lengthGrowth;
checkCol = false;
useAirLos = true;
SetRadiusAndHeight(length + lengthGrowth * alpha / alphaDecay, 0.0f);
}
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