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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "SmokeProjectile2.h"
#include "Game/Camera.h"
#include "Game/GlobalUnsynced.h"
#include "Map/Ground.h"
#include "Rendering/GlobalRendering.h"
#include "Rendering/ProjectileDrawer.h"
#include "Rendering/GL/VertexArray.h"
#include "Rendering/Textures/TextureAtlas.h"
#include "Sim/Misc/Wind.h"
CR_BIND_DERIVED(CSmokeProjectile2, CProjectile, )
CR_REG_METADATA(CSmokeProjectile2,
(
CR_MEMBER_BEGINFLAG(CM_Config),
CR_MEMBER(color),
CR_MEMBER(ageSpeed),
CR_MEMBER(size),
CR_MEMBER(startSize),
CR_MEMBER(sizeExpansion),
CR_MEMBER(wantedPos),
CR_MEMBER(glowFalloff),
CR_MEMBER_ENDFLAG(CM_Config),
CR_MEMBER(age),
CR_MEMBER(textureNum),
CR_RESERVED(8)
))
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CSmokeProjectile2::CSmokeProjectile2():
CProjectile(),
color(0.5f),
age(0.0f),
ageSpeed(1.0f),
size(0.0f),
startSize(0.0f),
sizeExpansion(0.0f),
textureNum(0),
glowFalloff(0.0f)
{
deleteMe = false;
checkCol = false;
}
CSmokeProjectile2::CSmokeProjectile2(
CUnit* owner,
const float3& pos,
const float3& wantedPos,
const float3& speed,
float ttl,
float startSize,
float sizeExpansion,
float color)
: CProjectile(pos, speed, owner, false, false, false),
color(color),
age(0),
size(0),
startSize(startSize),
sizeExpansion(sizeExpansion),
wantedPos(wantedPos)
{
ageSpeed = 1 / ttl;
checkCol = false;
castShadow = true;
if ((pos.y - CGround::GetApproximateHeight(pos.x, pos.z, false)) > 10) {
useAirLos = true;
}
glowFalloff = 4.5f + gu->RandFloat() * 6;
textureNum = (int)(gu->RandInt() % projectileDrawer->smoketex.size());
}
void CSmokeProjectile2::Init(const CUnit* owner, const float3& offset)
{
textureNum = (int) (gu->RandInt() % projectileDrawer->smoketex.size());
if (offset.y - CGround::GetApproximateHeight(offset.x, offset.z, false) > 10) {
useAirLos = true;
}
if (!owner) {
alwaysVisible = true;
}
wantedPos += offset;
CProjectile::Init(owner, offset);
}
void CSmokeProjectile2::Update()
{
wantedPos += speed;
wantedPos += wind.GetCurrentWind() * age * 0.05f;
pos.x += (wantedPos.x - pos.x) * 0.07f;
pos.y += (wantedPos.y - pos.y) * 0.02f;
pos.z += (wantedPos.z - pos.z) * 0.07f;
age += ageSpeed;
size += sizeExpansion;
if (size < startSize) {
size += (startSize - size) * 0.2f;
}
SetRadiusAndHeight(size, 0.0f);
if (age > 1) {
age = 1;
deleteMe = true;
}
}
void CSmokeProjectile2::Draw()
{
inArray = true;
const float interAge = std::min(1.0f, age + ageSpeed * globalRendering->timeOffset);
unsigned char col[4];
unsigned char alpha;
if (interAge < 0.05f) {
alpha = (unsigned char) (interAge * 19 * 127);
} else {
alpha = (unsigned char) ((1 - interAge) * 127);
}
const float rglow = std::max(0.f, (1 - (interAge * glowFalloff)) * 127);
const float gglow = std::max(0.f, (1 - (interAge * glowFalloff * 2.5f)) * 127);
col[0] = (unsigned char) (color * alpha + rglow);
col[1] = (unsigned char) (color * alpha + gglow);
col[2] = (unsigned char) std::max(0.f, color * alpha - gglow * 0.5f);
col[3] = alpha/*-alphaFalloff*globalRendering->timeOffset*/;
const float3 interPos = pos + (wantedPos + speed * globalRendering->timeOffset - pos) * 0.1f * globalRendering->timeOffset;
const float interSize = size + sizeExpansion * globalRendering->timeOffset;
const float3 pos1 ((camera->right - camera->up) * interSize);
const float3 pos2 ((camera->right + camera->up) * interSize);
#define st projectileDrawer->smoketex[textureNum]
va->AddVertexTC(interPos - pos2, st->xstart, st->ystart, col);
va->AddVertexTC(interPos + pos1, st->xend, st->ystart, col);
va->AddVertexTC(interPos + pos2, st->xend, st->yend, col);
va->AddVertexTC(interPos - pos1, st->xstart, st->yend, col);
#undef st
}
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