MineLittlePony/src/main/java/com/minelittlepony/render/BasePonyRenderer.java

package com.minelittlepony.render;

import net.minecraft.client.model.ModelBase;
import net.minecraft.client.model.ModelBox;
import net.minecraft.client.model.ModelRenderer;
import net.minecraft.client.model.TextureOffset;

@SuppressWarnings("unchecked")
public abstract class BasePonyRenderer<T extends BasePonyRenderer<T>> extends ModelRenderer {

    protected final ModelBase baseModel;

    protected int textureOffsetX, textureOffsetY;

    protected float modelOffsetX, modelOffsetY, modelOffsetZ;
    
    public BasePonyRenderer(ModelBase model) {
        super(model);
        baseModel = model;
    }

    public BasePonyRenderer(ModelBase model, int x, int y) {
        super(model, x, y);
        baseModel = model;
    }
    
    /**
     * Called to create a new instance of this renderer (used for child renderers)
     */
    protected abstract T copySelf();

    @Override
    public T setTextureOffset(int x, int y) {
        this.textureOffsetX = x;
        this.textureOffsetY = y;
        super.setTextureOffset(x, y);
        return (T) this;
    }
    
    /**
     * Flips the mirror flag. All faces are mirrored until this is called again.
     */
    public T mirror() {
        return mirror(!mirror);
    }
    
    public T mirror(boolean m) {
        mirror = m;
        return (T) this;
    }
    
    /**
     * Sets the texture offset
     */
    public T tex(int x, int y) {
        return setTextureOffset(x, y);
    }
    
    public T size(int x, int y) {
        return (T) setTextureSize(x, y);
    }
    
    /**
     * Positions this model in space.
     */
    public T at(float x, float y, float z) {
        return (T)at(this, x, y, z);
    }
    
    /**
     * Sets an offset to be used on all shapes and children created through this renderer.
     */
    public T offset(float x, float y, float z) {
        modelOffsetX = x;
        modelOffsetY = y;
        modelOffsetZ = z;
        return (T) this;
    }
    
    public static <T extends ModelRenderer> T at(T renderer, float x, float y, float z) {
        renderer.offsetX = x / 16;
        renderer.offsetY = y / 16;
        renderer.offsetZ = z / 16;
        return renderer;
    }
    
    public void rotateTo(ModelRenderer other) {
        rotateAngleX = other.rotateAngleX;
        rotateAngleY = other.rotateAngleY;
        rotateAngleZ = other.rotateAngleZ;
    }
    
    public T rotateAt(ModelRenderer other) {
        return at(other.rotationPointX, other.rotationPointY, other.rotationPointZ);
    }

    /**
     * Sets the rotation point.
     */
    public T around(float x, float y, float z) {
        setRotationPoint(x, y, z);
        return (T) this;
    }
    
    /**
     * Gets or creates a new child model based on its unique index.
     * New children will be of the same type and inherit the same textures and offsets of the original.
     */
    public T child(int index) {
        if (childModels == null || index >= childModels.size()) {
            addChild(copySelf().offset(modelOffsetX, modelOffsetY, modelOffsetZ));
        }
        return (T)childModels.get(index);
    }

    @Override
    public T addBox(String partName, float offX, float offY, float offZ, int width, int height, int depth) {
        partName = boxName + "." + partName;

        TextureOffset tex = baseModel.getTextureOffset(partName);

        setTextureOffset(tex.textureOffsetX, tex.textureOffsetY).addBox(offX, offY, offZ, width, height, depth);
        cubeList.get(cubeList.size() - 1).setBoxName(partName);

        return (T) this;
    }

    @Override
    public T addBox(float offX, float offY, float offZ, int width, int height, int depth) {
        addBox(offX, offY, offZ, width, height, depth, 0);
        return (T) this;
    }

    public T addBox(float offX, float offY, float offZ, int width, int height, int depth, boolean mirrored) {
        addBox(offX, offY, offZ, width, height, depth, 0, mirrored);
        return (T)this;
    }

    public void addBox(float offX, float offY, float offZ, int width, int height, int depth, float scaleFactor) {
        addBox(offX, offY, offZ, width, height, depth, scaleFactor, mirror);
    }
    
    /**
     * Creates a textured box.
     */
    public T box(float offX, float offY, float offZ, int width, int height, int depth, float scaleFactor) {
        return addBox(offX, offY, offZ, width, height, depth, scaleFactor, mirror);
    }
    
    private T addBox(float offX, float offY, float offZ, int width, int height, int depth, float scaleFactor, boolean mirrored) {
        createBox(modelOffsetX + offX, modelOffsetY + offY, modelOffsetZ + offZ, width, height, depth, scaleFactor, mirrored);
        return (T)this;
    }
    
    protected void createBox(float offX, float offY, float offZ, int width, int height, int depth, float scaleFactor, boolean mirrored) {
        cubeList.add(new ModelBox(this, textureOffsetX, textureOffsetY, offX, offY, offZ, width, height, depth, scaleFactor, mirrored));
    }
}