4jcraft/Minecraft.Client/Rendering/OffsettedRenderList.cpp

#include "../Platform/stdafx.h"
#include "../../Minecraft.World/IO/Streams/IntBuffer.h"
#include "OffsettedRenderList.h"

// 4J added
OffsettedRenderList::OffsettedRenderList() {
    x = y = z = 0;
    xOff = yOff = zOff = 0;
    lists = MemoryTracker::createIntBuffer(1024 * 64);
    inited = false;
    rendered = false;
}

void OffsettedRenderList::init(int x, int y, int z, double xOff, double yOff,
                               double zOff) {
    inited = true;
    lists->clear();
    this->x = x;
    this->y = y;
    this->z = z;

    this->xOff = (float)xOff;
    this->yOff = (float)yOff;
    this->zOff = (float)zOff;
}

bool OffsettedRenderList::isAt(int x, int y, int z) {
    if (!inited) return false;
    return x == this->x && y == this->y && z == this->z;
}

void OffsettedRenderList::add(int list) {
    // 4J - added - chunkList::getList returns -1 when chunks aren't visible, we
    // really don't want to end up sending that to glCallLists
    if (list >= 0) {
        lists->put(list);
    }
    if (lists->remaining() == 0) render();
}

void OffsettedRenderList::render() {
    if (!inited) return;
    if (!rendered) {
        lists->flip();
        rendered = true;
    }
    if (lists->remaining() > 0) {
        glPushMatrix();
        glTranslatef(x - xOff, y - yOff, z - zOff);
        glCallLists(lists);
        glPopMatrix();
    }
}

void OffsettedRenderList::clear() {
    inited = false;
    rendered = false;
}