#include "../../Platform/stdafx.h"
#include "HugeExplosionParticle.h"
#include "../../../Minecraft.World/Util/Random.h"
#include "../../Textures/Textures.h"
#include "../Tesselator.h"
#include "../Lighting.h"
#include "../../Textures/ResourceLocation.h"

ResourceLocation HugeExplosionParticle::EXPLOSION_LOCATION =
    ResourceLocation(TN_MISC_EXPLOSION);

HugeExplosionParticle::HugeExplosionParticle(Textures* textures, Level* level,
                                             double x, double y, double z,
                                             double xa, double ya, double za)
    : Particle(level, x, y, z, 0, 0, 0) {
    life = 0;

    this->textures = textures;
    lifeTime = 6 + random->nextInt(4);

    // rCol = gCol = bCol = random->nextFloat() * 0.6f + 0.4f;

    unsigned int clr = Minecraft::GetInstance()->getColourTable()->getColor(
        eMinecraftColour_Particle_HugeExplosion);  // 0x999999
    double r = ((clr >> 16) & 0xFF) / 255.0f, g = ((clr >> 8) & 0xFF) / 255.0,
           b = (clr & 0xFF) / 255.0;

    double br = random->nextFloat() * 0.6 + 0.4;
    rCol = r * br;
    gCol = g * br;
    bCol = b * br;

    size = 1 - (float)xa * 0.5f;
}

void HugeExplosionParticle::render(Tesselator* t, float a, float xa, float ya,
                                   float za, float xa2, float za2) {
    int tex = (int)((life + a) * 15 / lifeTime);
    if (tex > 15) return;
    textures->bindTexture(&EXPLOSION_LOCATION);

    float u0 = (tex % 4) / 4.0f;
    float u1 = u0 + 0.999f / 4.0f;
    float v0 = (tex / 4) / 4.0f;
    float v1 = v0 + 0.999f / 4.0f;

    float r = 2.0f * size;

    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);

    // 4J - don't render explosion particles that are less than 3 metres away,
    // to try and avoid large particles that are causing us problems with
    // photosensitivity testing
    float distSq = (x * x + y * y + z * z);
    if (distSq < (3.0f * 3.0f)) return;

    glColor4f(1, 1, 1, 1);
    glDisable(GL_LIGHTING);
    Lighting::turnOff();
    t->begin();
    t->color(rCol, gCol, bCol, 1.0f);
    t->normal(0, 1, 0);
    t->tex2(0x00f0);
    t->vertexUV(x - xa * r - xa2 * r, y - ya * r, z - za * r - za2 * r, u1, v1);
    t->vertexUV(x - xa * r + xa2 * r, y + ya * r, z - za * r + za2 * r, u1, v0);
    t->vertexUV(x + xa * r + xa2 * r, y + ya * r, z + za * r + za2 * r, u0, v0);
    t->vertexUV(x + xa * r - xa2 * r, y - ya * r, z + za * r - za2 * r, u0, v1);
    t->end();
    glPolygonOffset(0, 0.0f);
    glEnable(GL_LIGHTING);
}

int HugeExplosionParticle::getLightColor(float a) { return 0xf0f0; }

void HugeExplosionParticle::tick() {
    xo = x;
    yo = y;
    zo = z;
    life++;
    if (life == lifeTime) remove();
}

int HugeExplosionParticle::getParticleTexture() {
    return ParticleEngine::ENTITY_PARTICLE_TEXTURE;
}