#include "stdafx.h"
#include "FootstepParticle.h"
#include "Textures.h"
#include "Tesselator.h"
#include "..\Minecraft.World\Mth.h"
#include "..\Minecraft.World\net.minecraft.world.level.h"

FootstepParticle::FootstepParticle(Textures *textures, Level *level, double x, double y, double z) : Particle(level, x, y, z, 0, 0, 0)
{
	// 4J added initialisers
	life = 0;
	lifeTime = 0;

	this->textures = textures;
	xd = yd = zd = 0;
	lifeTime = 200;
}

void FootstepParticle::render(Tesselator *t, float a, float xa, float ya, float za, float xa2, float za2)
{
    float time = (life + a) / lifeTime;
    time = time * time;

    float alpha = 2 - time * 2;
    if (alpha > 1) alpha = 1;
    alpha = alpha * 0.2f;

    glDisable(GL_LIGHTING);
    float r = 2 / 16.0f;

    float xx = (float) (x - xOff);
    float yy = (float) (y - yOff);
    float zz = (float) (z - zOff);

    float br = level->getBrightness(Mth::floor(x), Mth::floor(y), Mth::floor(z));

    textures->bindTexture(TN_MISC_FOOTSTEP);//L"/misc/footprint.png"));
    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    t->begin();
    t->color(br, br, br, alpha);
    t->vertexUV((float)(xx - r), (float)( yy), (float)( zz + r), (float)( 0), (float)( 1));
    t->vertexUV((float)(xx + r), (float)( yy), (float)( zz + r), (float)( 1), (float)( 1));
    t->vertexUV((float)(xx + r), (float)( yy), (float)( zz - r), (float)( 1), (float)( 0));
    t->vertexUV((float)(xx - r), (float)( yy), (float)( zz - r), (float)( 0), (float)( 0));
    t->end();

    glDisable(GL_BLEND);
    glEnable(GL_LIGHTING);

}

void FootstepParticle::tick()
{
    life++;
    if (life == lifeTime) remove();
}

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