top.hendrixshen.magiclib.impl.render.CameraPositionTransformer Maven / Gradle / Ivy

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/*
 * This file is part of the TweakerMore project, licensed under the
 * GNU Lesser General Public License v3.0
 *
 * Copyright (C) 2023  Fallen_Breath and contributors
 *
 * TweakerMore is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * TweakerMore is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with TweakerMore.  If not, see .
 */

package top.hendrixshen.magiclib.impl.render;

import org.joml.Matrix4f;
import net.minecraft.client.Camera;
import net.minecraft.client.Minecraft;
import net.minecraft.world.phys.Vec3;
import org.jetbrains.annotations.NotNull;
import top.hendrixshen.magiclib.api.render.context.RenderContext;

import java.util.Objects;

//#if MC < 11500
//$$ import com.mojang.blaze3d.platform.GlStateManager;
//$$ import net.minecraft.client.renderer.entity.EntityRenderDispatcher;
//#endif

/**
 * Reference to TweakerMore
 */
public class CameraPositionTransformer {
    private final Vec3 pos;

    private RenderContext context;

    public static @NotNull CameraPositionTransformer create(Vec3 pos) {
        return new CameraPositionTransformer(pos);
    }

    private CameraPositionTransformer(Vec3 pos) {
        this.pos = pos;
    }

    /**
     * Pose stack of renderContext will be pushed
     */
    public void apply(@NotNull RenderContext context) {
        this.context = context;
        Minecraft mc = Minecraft.getInstance();
        Camera camera = mc.gameRenderer.getMainCamera();
        Vec3 vec3 = this.pos.subtract(camera.getPosition());
        context.pushMatrix();
        context.translate(vec3.x(), vec3.y(), vec3.z());
        //#if MC > 11404
        context.mulPoseMatrix(
                //#if MC > 11902
                new Matrix4f().rotation(camera.rotation())
                //#else
                //$$ new Matrix4f(camera.rotation())
                //#endif
        );
        //#else
        //$$ EntityRenderDispatcher entityRenderDispatcher = mc.getEntityRenderDispatcher();
        //$$ GlStateManager.rotatef(-entityRenderDispatcher.playerRotY, 0.0F, 1.0F, 0.0F);
        //$$ GlStateManager.rotatef(entityRenderDispatcher.playerRotX, 1.0F, 0.0F, 0.0F);
        //#endif
    }

    /**
     * Pose stack of renderContext will be popped
     */
    public void restore() {
        if (this.context == null) {
            throw new RuntimeException("CameraPositionTransformer: Calling restore before calling apply");
        }

        this.context.popMatrix();
        this.context = null;
    }

    public RenderContext getContext() {
        return Objects.requireNonNull(this.context);
    }
}