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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "SmokeTrailProjectile.h"
#include "Game/Camera.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"
#include "System/myMath.h"
CR_BIND_DERIVED(CSmokeTrailProjectile, CProjectile, (NULL, ZeroVector, ZeroVector, ZeroVector, ZeroVector, false, false, 0.0f, 0, 0.0f, false, NULL, NULL))
CR_REG_METADATA(CSmokeTrailProjectile,(
CR_MEMBER(pos1),
CR_MEMBER(pos2),
CR_MEMBER(orgSize),
CR_MEMBER(creationTime),
CR_MEMBER(lifeTime),
CR_MEMBER(color),
CR_MEMBER(dir1),
CR_MEMBER(dir2),
CR_MEMBER(drawTrail),
CR_MEMBER(dirpos1),
CR_MEMBER(dirpos2),
CR_MEMBER(midpos),
CR_MEMBER(middir),
CR_MEMBER(drawSegmented),
CR_MEMBER(firstSegment),
CR_MEMBER(lastSegment),
CR_MEMBER(drawCallbacker),
CR_MEMBER(texture),
CR_RESERVED(4)
))
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CSmokeTrailProjectile::CSmokeTrailProjectile(
const CUnit* owner,
const float3& pos1,
const float3& pos2,
const float3& dir1,
const float3& dir2,
bool firstSegment,
bool lastSegment,
float size,
int time,
float color,
bool drawTrail,
CProjectile* drawCallback,
AtlasedTexture* texture
):
CProjectile((pos1 + pos2) * 0.5f, ZeroVector, owner, false, false, false),
pos1(pos1),
pos2(pos2),
orgSize(size),
creationTime(gs->frameNum),
lifeTime(time),
color(color),
dir1(dir1),
dir2(dir2),
drawTrail(drawTrail),
drawSegmented(false),
firstSegment(firstSegment),
lastSegment(lastSegment),
drawCallbacker(drawCallback),
texture(texture == NULL ? projectileDrawer->smoketrailtex : texture)
{
checkCol = false;
castShadow = true;
if (!drawTrail) {
const float dist = pos1.distance(pos2);
dirpos1 = pos1 - dir1 * dist * 0.33f;
dirpos2 = pos2 + dir2 * dist * 0.33f;
} else if (dir1.dot(dir2) < 0.98f) {
const float dist = pos1.distance(pos2);
dirpos1 = pos1 - dir1 * dist * 0.33f;
dirpos2 = pos2 + dir2 * dist * 0.33f;
// float3 mp = (pos1 + pos2) / 2;
midpos = CalcBeizer(0.5f, pos1, dirpos1, dirpos2, pos2);
middir = (dir1 + dir2).ANormalize();
drawSegmented = true;
}
SetRadiusAndHeight(pos1.distance(pos2), 0.0f);
if ((pos.y - CGround::GetApproximateHeight(pos.x, pos.z)) > 10) {
useAirLos = true;
}
}
CSmokeTrailProjectile::~CSmokeTrailProjectile()
{
}
void CSmokeTrailProjectile::Draw()
{
inArray = true;
float age = gs->frameNum + globalRendering->timeOffset - creationTime;
va->EnlargeArrays(8 * 4, 0, VA_SIZE_TC);
if (drawTrail) {
const float3 dif1 = (pos1 - camera->GetPos()).ANormalize();
const float3 dif2 = (pos2 - camera->GetPos()).ANormalize();
const float3 odir1 = (dif1.cross(dir1)).ANormalize();
const float3 odir2 = (dif2.cross(dir2)).ANormalize();
unsigned char col[4];
float a1 = (1 - (float) age / lifeTime) * 255;
if (lastSegment) {
a1 = 0;
}
a1 *= 0.7f + math::fabs(dif1.dot(dir1));
float alpha = std::min(255.f, std::max(0.f, a1));
col[0] = (unsigned char) (color * alpha);
col[1] = (unsigned char) (color * alpha);
col[2] = (unsigned char) (color * alpha);
col[3] = (unsigned char) alpha;
unsigned char col2[4];
float a2 = (1 - (float)(age + 8) / lifeTime) * 255;
if (firstSegment) {
a2 = 0;
}
a2 *= 0.7f + math::fabs(dif2.dot(dir2));
alpha = std::min(255.f, std::max(0.0f, a2));
col2[0] = (unsigned char) (color * alpha);
col2[1] = (unsigned char) (color * alpha);
col2[2] = (unsigned char) (color * alpha);
col2[3] = (unsigned char) alpha;
float size = 1 + ( age * (1.0f / lifeTime)) * orgSize;
float size2 = 1 + ((age + 8) * (1.0f / lifeTime)) * orgSize;
if (drawSegmented) {
const float3 dif3 = (midpos - camera->GetPos()).ANormalize();
const float3 odir3 = (dif3.cross(middir)).ANormalize();
float size3 = 0.2f + ((age + 4) * (1.0f / lifeTime)) * orgSize;
unsigned char col3[4];
float a2 = (1 - (float)(age + 4) / lifeTime) * 255;
a2 *= 0.7f + math::fabs(dif3.dot(middir));
alpha = std::min(255.0f, std::max(0.0f, a2));
col3[0] = (unsigned char) (color * alpha);
col3[1] = (unsigned char) (color * alpha);
col3[2] = (unsigned char) (color * alpha);
col3[3] = (unsigned char) alpha;
const float midtexx = texture->xstart + ((texture->xend - texture->xstart) * 0.5f);
va->AddVertexQTC(pos1 - (odir1 * size), texture->xstart, texture->ystart, col);
va->AddVertexQTC(pos1 + (odir1 * size), texture->xstart, texture->yend, col);
va->AddVertexQTC(midpos + (odir3 * size3), midtexx, texture->yend, col3);
va->AddVertexQTC(midpos - (odir3 * size3), midtexx, texture->ystart, col3);
va->AddVertexQTC(midpos - (odir3 * size3), midtexx, texture->ystart, col3);
va->AddVertexQTC(midpos + (odir3 * size3), midtexx, texture->yend, col3);
va->AddVertexQTC(pos2 + (odir2 * size2), texture->xend, texture->yend, col2);
va->AddVertexQTC(pos2 - (odir2 * size2), texture->xend, texture->ystart, col2);
} else {
va->AddVertexQTC(pos1 - (odir1 * size), texture->xstart, texture->ystart, col);
va->AddVertexQTC(pos1 + (odir1 * size), texture->xstart, texture->yend, col);
va->AddVertexQTC(pos2 + (odir2 * size2), texture->xend, texture->yend, col2);
va->AddVertexQTC(pos2 - (odir2 * size2), texture->xend, texture->ystart, col2);
}
} else {
// draw as particles
unsigned char col[4];
for (int a = 0; a < 8; ++a) {
const float a1 = 1 - (float)(age + a) / lifeTime;
const float alpha = std::min(255.0f, std::max(0.0f, a1 * 255));
const float size = ((0.2f + (age + a) * (1.0f / lifeTime)) * orgSize) * 1.2f;
col[0] = (unsigned char) (color * alpha);
col[1] = (unsigned char) (color * alpha);
col[2] = (unsigned char) (color * alpha);
col[3] = (unsigned char) alpha;
#define st projectileDrawer->smoketex[0]
va->AddVertexQTC(pos1 + ( camera->up + camera->right) * size, st->xstart, st->ystart, col);
va->AddVertexQTC(pos1 + ( camera->up - camera->right) * size, st->xend, st->ystart, col);
va->AddVertexQTC(pos1 + (-camera->up - camera->right) * size, st->xend, st->ystart, col);
va->AddVertexQTC(pos1 + (-camera->up + camera->right) * size, st->xstart, st->ystart, col);
#undef st
}
}
CProjectile* callbacker = drawCallbacker;
if (callbacker != NULL) {
callbacker->DrawCallback();
}
}
void CSmokeTrailProjectile::Update()
{
deleteMe |= (gs->frameNum >= (creationTime + lifeTime));
}
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