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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "BitmapMuzzleFlame.h"
#include "Sim/Misc/GlobalSynced.h"
#include "Rendering/GlobalRendering.h"
#include "Rendering/GL/VertexArray.h"
#include "Rendering/Textures/ColorMap.h"
#include "Rendering/Textures/TextureAtlas.h"
#include "Sim/Projectiles/ProjectileHandler.h"
CR_BIND_DERIVED(CBitmapMuzzleFlame, CProjectile, )
CR_REG_METADATA(CBitmapMuzzleFlame,
(
CR_MEMBER(invttl),
CR_MEMBER(life),
CR_MEMBER(createTime),
CR_MEMBER_BEGINFLAG(CM_Config),
CR_MEMBER(sideTexture),
CR_MEMBER(frontTexture),
CR_MEMBER(colorMap),
CR_MEMBER(size),
CR_MEMBER(length),
CR_MEMBER(sizeGrowth),
CR_MEMBER(ttl),
CR_MEMBER(frontOffset),
CR_MEMBER_ENDFLAG(CM_Config)
))
CBitmapMuzzleFlame::CBitmapMuzzleFlame()
: CProjectile()
, sideTexture(NULL)
, frontTexture(NULL)
, colorMap(NULL)
, size(0.0f)
, length(0.0f)
, sizeGrowth(0.0f)
, frontOffset(0.0f)
, ttl(0)
, invttl(0.0f)
, life(0.0f)
, createTime(0)
{
// set fields from super-classes
useAirLos = true;
checkCol = false;
deleteMe = false;
}
void CBitmapMuzzleFlame::Draw()
{
inArray = true;
life = (gs->frameNum - createTime + globalRendering->timeOffset) * invttl;
unsigned char col[4];
colorMap->GetColor(col, life);
const float igrowth = sizeGrowth * (1.0f - (1.0f - life) * (1.0f - life));
const float isize = size * (igrowth + 1.0f);
const float ilength = length * (igrowth + 1.0f);
const float3 udir = (std::fabs(dir.dot(UpVector)) >= 0.99f)? FwdVector: UpVector;
const float3 xdir = (dir.cross(udir)).SafeANormalize();
const float3 ydir = (dir.cross(xdir)).SafeANormalize();
va->AddVertexTC(pos + ydir * isize, sideTexture->xstart, sideTexture->ystart, col);
va->AddVertexTC(pos + ydir * isize + dir * ilength, sideTexture->xend, sideTexture->ystart, col);
va->AddVertexTC(pos - ydir * isize + dir * ilength, sideTexture->xend, sideTexture->yend, col);
va->AddVertexTC(pos - ydir * isize, sideTexture->xstart, sideTexture->yend, col);
va->AddVertexTC(pos + xdir * isize, sideTexture->xstart, sideTexture->ystart, col);
va->AddVertexTC(pos + xdir * isize + dir * ilength, sideTexture->xend, sideTexture->ystart, col);
va->AddVertexTC(pos - xdir * isize + dir * ilength, sideTexture->xend, sideTexture->yend, col);
va->AddVertexTC(pos - xdir * isize, sideTexture->xstart, sideTexture->yend, col);
float3 frontpos = pos + dir * frontOffset * ilength;
va->AddVertexTC(frontpos - xdir * isize + ydir * isize, frontTexture->xstart, frontTexture->ystart, col);
va->AddVertexTC(frontpos + xdir * isize + ydir * isize, frontTexture->xend, frontTexture->ystart, col);
va->AddVertexTC(frontpos + xdir * isize - ydir * isize, frontTexture->xend, frontTexture->yend, col);
va->AddVertexTC(frontpos - xdir * isize - ydir * isize, frontTexture->xstart, frontTexture->yend, col);
}
void CBitmapMuzzleFlame::Update()
{
deleteMe |= ((ttl--) == 0);
}
void CBitmapMuzzleFlame::Init(const CUnit* owner, const float3& offset)
{
CProjectile::Init(owner, offset);
life = 0.0f;
invttl = 1.0f / ttl;
createTime = gs->frameNum;
}
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