#include "../Platform/stdafx.h"
#include "Lighting.h"
#include "../../Minecraft.World/IO/Streams/FloatBuffer.h"
#include "../../Minecraft.World/Util/Vec3.h"

FloatBuffer* Lighting::lb = new FloatBuffer(16);

void Lighting::turnOff() {
    glDisable(GL_LIGHTING);
    glDisable(GL_LIGHT0);
    glDisable(GL_LIGHT1);
    glDisable(GL_COLOR_MATERIAL);
}

void Lighting::turnOn() {
    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    glEnable(GL_LIGHT1);
    glEnable(GL_COLOR_MATERIAL);
    glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
    float a = 0.4f;
    float d = 0.6f;
    float s = 0.0f;

    Vec3 l(0.2f, 1.0f, -0.7f);
    l = l.normalize();
    glLight(GL_LIGHT0, GL_POSITION, getBuffer(l.x, l.y, l.z, 0));
    glLight(GL_LIGHT0, GL_DIFFUSE, getBuffer(d, d, d, 1));
    glLight(GL_LIGHT0, GL_AMBIENT, getBuffer(0.0f, 0.0f, 0.0f, 1.0f));
    glLight(GL_LIGHT0, GL_SPECULAR, getBuffer(s, s, s, 1.0f));

    l = Vec3(-0.2f, 1.0f, 0.7f);
    l = l.normalize();
    glLight(GL_LIGHT1, GL_POSITION, getBuffer(l.x, l.y, l.z, 0));
    glLight(GL_LIGHT1, GL_DIFFUSE, getBuffer(d, d, d, 1));
    glLight(GL_LIGHT1, GL_AMBIENT, getBuffer(0.0f, 0.0f, 0.0f, 1.0f));
    glLight(GL_LIGHT1, GL_SPECULAR, getBuffer(s, s, s, 1.0f));

    glShadeModel(GL_FLAT);
    glLightModel(GL_LIGHT_MODEL_AMBIENT, getBuffer(a, a, a, 1));
}

FloatBuffer* Lighting::getBuffer(double a, double b, double c, double d) {
    return getBuffer((float)a, (float)b, (float)c, (float)d);
}

FloatBuffer* Lighting::getBuffer(float a, float b, float c, float d) {
    lb->clear();
    lb->put(a)->put(b)->put(c)->put(d);
    lb->flip();
    return lb;
}

void Lighting::turnOnGui() {
    glPushMatrix();
    glRotatef(-30, 0, 1, 0);
    glRotatef(165, 1, 0, 0);
    turnOn();
    glPopMatrix();
}