4jcraft/targets/minecraft/client/particle/Particle.cpp

#include "Particle.h"

#include <stdio.h>

#include <cmath>

#include "app/linux/Stubs/winapi_stubs.h"
#include "java/JavaMath.h"
#include "java/Random.h"
#include "minecraft/SharedConstants.h"
#include "minecraft/client/Minecraft.h"
#include "minecraft/client/particle/ParticleEngine.h"
#include "minecraft/client/renderer/Tesselator.h"
#include "minecraft/world/Icon.h"
#include "minecraft/world/entity/Entity.h"

class Level;
class Textures;

/*
    protected int tex;
    protected float gravity;
        */

double Particle::xOff = 0;
double Particle::yOff = 0;
double Particle::zOff = 0;

void Particle::_init(Level* level, double x, double y, double z) {
    // 4J - added these initialisers
    alpha = 1.0f;
    tex = nullptr;
    gravity = 0.0f;

    setSize(0.2f, 0.2f);
    heightOffset = bbHeight / 2.0f;
    setPos(x, y, z);
    xo = xOld = x;
    yo = yOld = y;
    zo = zOld = z;
    rCol = gCol = bCol = 1.0f;

    uo = random->nextFloat() * 3;
    vo = random->nextFloat() * 3;

    size = (random->nextFloat() * 0.5f + 0.5f) * 2;

    lifetime = (int)(4 / (random->nextFloat() * 0.9f + 0.1f));
    age = 0;

    texX = 0;
    texY = 0;
}

Particle::Particle(Level* level, double x, double y, double z)
    : Entity(level, false) {
    _init(level, x, y, z);
}

Particle::Particle(Level* level, double x, double y, double z, double xa,
                   double ya, double za)
    : Entity(level, false) {
    _init(level, x, y, z);

    xd = xa + (float)(Math::random() * 2 - 1) * 0.4f;
    yd = ya + (float)(Math::random() * 2 - 1) * 0.4f;
    zd = za + (float)(Math::random() * 2 - 1) * 0.4f;
    float speed = (float)(Math::random() + Math::random() + 1) * 0.15f;

    float dd = (float)(std::sqrt(xd * xd + yd * yd + zd * zd));
    xd = xd / dd * speed * 0.4f;
    yd = yd / dd * speed * 0.4f + 0.1f;
    zd = zd / dd * speed * 0.4f;
}

std::shared_ptr<Particle> Particle::setPower(float power) {
    xd *= power;
    yd = (yd - 0.1f) * power + 0.1f;
    zd *= power;
    return std::dynamic_pointer_cast<Particle>(shared_from_this());
}

std::shared_ptr<Particle> Particle::scale(float scale) {
    setSize(0.2f * scale, 0.2f * scale);
    size *= scale;
    return std::dynamic_pointer_cast<Particle>(shared_from_this());
}

void Particle::setColor(float r, float g, float b) {
    this->rCol = r;
    this->gCol = g;
    this->bCol = b;
}

void Particle::setAlpha(float alpha) {
    // 4J - brought forward from Java 1.8
    if (this->alpha == 1.0f && alpha < 1.0f) {
        Minecraft::GetInstance()->particleEngine->markTranslucent(
            std::dynamic_pointer_cast<Particle>(shared_from_this()));
    } else if (this->alpha < 1.0f && alpha == 1.0f) {
        Minecraft::GetInstance()->particleEngine->markOpaque(
            std::dynamic_pointer_cast<Particle>(shared_from_this()));
    }
    this->alpha = alpha;
}

float Particle::getRedCol() { return rCol; }

float Particle::getGreenCol() { return gCol; }

float Particle::getBlueCol() { return bCol; }

float Particle::getAlpha() { return alpha; }

bool Particle::makeStepSound() { return false; }

void Particle::defineSynchedData() {}

void Particle::tick() {
    xo = x;
    yo = y;
    zo = z;

    if (age++ >= lifetime) remove();

    yd -= 0.04 * gravity;
    move(xd, yd, zd);
    xd *= 0.98f;
    yd *= 0.98f;
    zd *= 0.98f;

    if (onGround) {
        xd *= 0.7f;
        zd *= 0.7f;
    }
}

void Particle::render(Tesselator* t, float a, float xa, float ya, float za,
                      float xa2, float za2) {
    float u0 = texX / 16.0f;
    float u1 = u0 + 0.999f / 16.0f;
    float v0 = texY / 16.0f;
    float v1 = v0 + 0.999f / 16.0f;
    float r = 0.1f * size;

    if (tex != nullptr) {
        u0 = tex->getU0();
        u1 = tex->getU1();
        v0 = tex->getV0();
        v1 = tex->getV1();
    }

    float x = (float)(xo + (this->x - xo) * a - xOff);
    float y = (float)(yo + (this->y - yo) * a - yOff);
    float z = (float)(zo + (this->z - zo) * a - zOff);

    float br = 1.0f;  // 4J - change brought forward from 1.8.2
    if (!SharedConstants::TEXTURE_LIGHTING) {
        br = getBrightness(a);
    }

    t->color(rCol * br, gCol * br, bCol * br, alpha);

    t->vertexUV((float)(x - xa * r - xa2 * r), (float)(y - ya * r),
                (float)(z - za * r - za2 * r), (float)(u1), (float)(v1));
    t->vertexUV((float)(x - xa * r + xa2 * r), (float)(y + ya * r),
                (float)(z - za * r + za2 * r), (float)(u1), (float)(v0));
    t->vertexUV((float)(x + xa * r + xa2 * r), (float)(y + ya * r),
                (float)(z + za * r + za2 * r), (float)(u0), (float)(v0));
    t->vertexUV((float)(x + xa * r - xa2 * r), (float)(y - ya * r),
                (float)(z + za * r - za2 * r), (float)(u0), (float)(v1));
}

int Particle::getParticleTexture() { return ParticleEngine::MISC_TEXTURE; }

void Particle::addAdditonalSaveData(CompoundTag* entityTag) {}

void Particle::readAdditionalSaveData(CompoundTag* tag) {}

void Particle::setTex(Textures* textures, Icon* icon) {
    if (getParticleTexture() == ParticleEngine::TERRAIN_TEXTURE) {
        tex = icon;
    } else if (getParticleTexture() == ParticleEngine::ITEM_TEXTURE) {
        tex = icon;
    } else {
#if !defined(_CONTENT_PACKAGE)
        printf("Invalid call to Particle.setTex, use coordinate methods\n");
        assert(0);
#endif
        // throw new RuntimeException("Invalid call to Particle.setTex, use
        // coordinate methods");
    }
}

void Particle::setMiscTex(int slotIndex) {
    if (getParticleTexture() != ParticleEngine::MISC_TEXTURE &&
        getParticleTexture() != ParticleEngine::DRAGON_BREATH_TEXTURE) {
#if !defined(_CONTENT_PACKAGE)
        printf("Invalid call to Particle.setMixTex\n");
        assert(0);
        // throw new RuntimeException("Invalid call to Particle.setMiscTex");
#endif
    }
    texX = slotIndex % 16;
    texY = slotIndex / 16;
}

void Particle::setNextMiscAnimTex() { texX++; }

bool Particle::isAttackable() { return false; }

//@Override
std::string Particle::toString() {
    return "A particle";  // getClass()->getSimpleName() + ", Pos (" + x + ","
                           // + y + "," + z + "), RGBA (" + rCol + "," + gCol +
                           // "," + bCol + "," + alpha + "), Age " + age;
}