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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "RepulseGfx.h"
#include "Rendering/GlobalRendering.h"
#include "Rendering/Env/Particles/ProjectileDrawer.h"
#include "Rendering/GL/RenderDataBuffer.hpp"
#include "Rendering/Textures/TextureAtlas.h"
#include "Sim/Units/Unit.h"
CR_BIND_DERIVED(CRepulseGfx, CProjectile, )
CR_REG_METADATA(CRepulseGfx,(
CR_MEMBER(repulsed),
CR_MEMBER(sqMaxOwnerDist),
CR_MEMBER(age),
CR_MEMBER(color),
CR_MEMBER(vertexDists)
))
CRepulseGfx::CRepulseGfx(CUnit* owner, CProjectile* repulsee, float maxOwnerDist, const float4& gfxColor):
CProjectile((repulsee != nullptr)? repulsee->pos: ZeroVector, (repulsee != nullptr)? repulsee->speed: ZeroVector, owner, false, false, false),
repulsed(repulsee),
age(0),
sqMaxOwnerDist((maxOwnerDist * maxOwnerDist) + 100.0f),
color(gfxColor)
{
if (repulsed != nullptr)
AddDeathDependence(repulsed, DEPENDENCE_REPULSE);
checkCol = false;
useAirLos = true;
SetRadiusAndHeight(maxOwnerDist, 0.0f);
for (int y = 0; y < 5; ++y) {
float yp = (y / 4.0f - 0.5f);
for (int x = 0; x < 5; ++x) {
float xp = (x / 4.0f - 0.5f);
float d = 0;
if (xp != 0 || yp != 0)
d = fastmath::apxsqrt2(xp * xp + yp * yp);
vertexDists[y * 5 + x] = (1.0f - fastmath::cos(d * 2.0f)) * 20.0f;
}
}
}
void CRepulseGfx::DependentDied(CObject* o)
{
if (o != repulsed)
return;
repulsed = nullptr;
deleteMe = true;
}
void CRepulseGfx::Draw(GL::RenderDataBufferTC* va) const
{
const CUnit* owner = CProjectile::owner();
if (owner == nullptr || repulsed == nullptr)
return;
const float3 zdir = (repulsed->pos - owner->pos).SafeANormalize();
const float3 xdir = (zdir.cross(UpVector)).SafeANormalize();
const float3 ydir = xdir.cross(zdir);
float3 xdirDS;
float3 ydirDS;
const float3 drawPos = pos - (zdir * 10.0f) + (repulsed->speed * globalRendering->timeOffset);
float drawsize = 10.0f;
float alpha = std::min(255.0f, age * 10.0f);
unsigned char col[4] = {
(unsigned char) (color.x * alpha ),
(unsigned char) (color.y * alpha ),
(unsigned char) (color.z * alpha ),
(unsigned char) (color.w * alpha * 0.2f),
};
constexpr unsigned char col2[4] = {0, 0, 0, 0};
xdirDS = xdir * drawsize;
ydirDS = ydir * drawsize;
const AtlasedTexture* et = projectileDrawer->repulsetex;
const float txo = et->xstart;
const float tyo = et->ystart;
const float txs = et->xend - et->xstart;
const float tys = et->yend - et->ystart;
static constexpr int loopCountY = 4;
static constexpr int loopCountX = 4;
for (int y = 0; y < loopCountY; ++y) {
const float dy = y - 2.0f;
const float ry = y * 0.25f;
for (int x = 0; x < loopCountX; ++x) {
const float dx = x - 2.00f;
const float rx = x * 0.25f;
va->SafeAppend({drawPos + xdirDS * (dx + 0) + ydirDS * (dy + 0) + zdir * vertexDists[(y ) * 5 + x ], txo + (ry ) * txs, tyo + (rx ) * tys, col});
va->SafeAppend({drawPos + xdirDS * (dx + 0) + ydirDS * (dy + 1) + zdir * vertexDists[(y + 1) * 5 + x ], txo + (ry + 0.25f) * txs, tyo + (rx ) * tys, col});
va->SafeAppend({drawPos + xdirDS * (dx + 1) + ydirDS * (dy + 1) + zdir * vertexDists[(y + 1) * 5 + x + 1], txo + (ry + 0.25f) * txs, tyo + (rx + 0.25f) * tys, col});
va->SafeAppend({drawPos + xdirDS * (dx + 1) + ydirDS * (dy + 1) + zdir * vertexDists[(y + 1) * 5 + x + 1], txo + (ry + 0.25f) * txs, tyo + (rx + 0.25f) * tys, col});
va->SafeAppend({drawPos + xdirDS * (dx + 1) + ydirDS * (dy + 0) + zdir * vertexDists[(y ) * 5 + x + 1], txo + (ry ) * txs, tyo + (rx + 0.25f) * tys, col});
va->SafeAppend({drawPos + xdirDS * (dx + 0) + ydirDS * (dy + 0) + zdir * vertexDists[(y ) * 5 + x ], txo + (ry ) * txs, tyo + (rx ) * tys, col});
}
}
drawsize = 7.0f;
alpha = std::min(10.0f, age / 2.0f);
col[0] = (unsigned char) (color.x * alpha );
col[1] = (unsigned char) (color.y * alpha );
col[2] = (unsigned char) (color.z * alpha );
col[3] = (unsigned char) (color.w * alpha * 0.4f);
const AtlasedTexture* ct = projectileDrawer->repulsegfxtex;
const float tx = (ct->xend + ct->xstart) * 0.5f;
const float ty = (ct->yend + ct->ystart) * 0.5f;
xdirDS = xdir * drawsize;
ydirDS = ydir * drawsize;
{
va->SafeAppend({owner->pos + (-xdir + ydir ) * drawsize * 0.2f, tx, ty, col2});
va->SafeAppend({owner->pos + ( xdir + ydir ) * drawsize * 0.2f, tx, ty, col2});
va->SafeAppend({ drawPos + xdirDS + ydirDS + zdir * vertexDists[6], tx, ty, col });
va->SafeAppend({ drawPos + xdirDS + ydirDS + zdir * vertexDists[6], tx, ty, col });
va->SafeAppend({ drawPos - xdirDS + ydirDS + zdir * vertexDists[6], tx, ty, col });
va->SafeAppend({owner->pos + (-xdir + ydir ) * drawsize * 0.2f, tx, ty, col2});
}
{
va->SafeAppend({owner->pos + (-xdir - ydir ) * drawsize * 0.2f, tx, ty, col2});
va->SafeAppend({owner->pos + ( xdir - ydir ) * drawsize * 0.2f, tx, ty, col2});
va->SafeAppend({ drawPos + xdirDS - ydirDS + zdir * vertexDists[6], tx, ty, col });
va->SafeAppend({ drawPos + xdirDS - ydirDS + zdir * vertexDists[6], tx, ty, col });
va->SafeAppend({ drawPos - xdirDS - ydirDS + zdir * vertexDists[6], tx, ty, col });
va->SafeAppend({owner->pos + (-xdir - ydir ) * drawsize * 0.2f, tx, ty, col2});
}
{
va->SafeAppend({owner->pos + ( xdir - ydir ) * drawsize * 0.2f, tx, ty, col2});
va->SafeAppend({owner->pos + ( xdir + ydir ) * drawsize * 0.2f, tx, ty, col2});
va->SafeAppend({ drawPos + xdirDS + ydirDS + zdir * vertexDists[6], tx, ty, col });
va->SafeAppend({ drawPos + xdirDS + ydirDS + zdir * vertexDists[6], tx, ty, col });
va->SafeAppend({ drawPos + xdirDS - ydirDS + zdir * vertexDists[6], tx, ty, col });
va->SafeAppend({owner->pos + ( xdir - ydir ) * drawsize * 0.2f, tx, ty, col2});
}
{
va->SafeAppend({owner->pos + (-xdir - ydir ) * drawsize * 0.2f, tx, ty, col2});
va->SafeAppend({owner->pos + (-xdir + ydir ) * drawsize * 0.2f, tx, ty, col2});
va->SafeAppend({ drawPos - xdirDS + ydirDS + zdir * vertexDists[6], tx, ty, col });
va->SafeAppend({ drawPos - xdirDS + ydirDS + zdir * vertexDists[6], tx, ty, col });
va->SafeAppend({ drawPos - xdirDS - ydirDS + zdir * vertexDists[6], tx, ty, col });
va->SafeAppend({owner->pos + (-xdir - ydir ) * drawsize * 0.2f, tx, ty, col2});
}
}
void CRepulseGfx::Update()
{
pos = repulsed->pos;
age += 1;
deleteMe |= (repulsed != nullptr && owner() != nullptr && (repulsed->pos - owner()->pos).SqLength() > sqMaxOwnerDist);
}
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