super-snuvi/src/me/hammerle/supersnuvi/entity/components/ai/HumanController.java

package me.hammerle.supersnuvi.entity.components.ai;

import me.hammerle.snuviengine.api.Shader;
import me.hammerle.snuviengine.api.Texture;
import me.hammerle.supersnuvi.Keys;
import me.hammerle.supersnuvi.entity.Entity;
import me.hammerle.supersnuvi.util.Face;
import me.hammerle.supersnuvi.util.Utils;

public class HumanController extends Controller
{
    private final static int SIZE = 1024;
    private final static Texture HERO = new Texture("resources/hero.png");
    
    private class TexturePart
    {
        private boolean draw = false;
        private float ox = 0.0f;
        private float oy = 0.0f;
        private float w = 0.0f;
        private float h = 0.0f;
        private float tx = 0.0f;
        private float ty = 0.0f;
    }
    
    private TexturePart body = new TexturePart();
    private TexturePart arms = new TexturePart();
    private TexturePart head = new TexturePart();
    private TexturePart[] parts = new TexturePart[] 
    {
        body, arms, head
    };
    
    private int walkFrame = 0;
    private int idleFrame = 0;

    public HumanController(Entity ent) 
    {
        super(ent);
    }
    
    private void nextWalkFrame()
    {
        walkFrame = (walkFrame + 1) % 9;
        idleFrame = 0;
    }
    
    private void nextIdleFrame()
    {
        walkFrame = 0;
        idleFrame = (idleFrame + 1) % 14;   
    }
    
    private void resetFrames()
    {
        walkFrame = 0;
        idleFrame = 0;   
    }
    
    @Override
    public void tick() 
    {
        for(TexturePart tp : parts)
        {
            tp.draw = false;
        }
        
        float speed = ent.getMovement().getVelocityX();
        if(Keys.RUN.isDown())
        {
            speed *= 1.5f;
        }
        
        if(Keys.LEFT.isDown())
        {
            ent.setMotionX(-speed);
        }
        
        if(Keys.RIGHT.isDown())
        {
            ent.setMotionX(speed);
        }
        
        if(Keys.JUMP.isDown())
        {
            ent.getMovement().jump();
        }
        
        body.draw = true;
        body.ox = 0.0f;
        body.oy = 0.0f;
        body.h = 64.0f;
        body.w = 32.0f;
        
        if(ent.isOnGround())
        {
            if(ent.getMotionX() == 0.0f)
            {
                nextIdleFrame();
                body.tx = (idleFrame * 32.0f) / SIZE;
                body.ty = 128.0f / SIZE;
            }
            else
            {
                nextWalkFrame();
                body.tx = (96.0f + walkFrame * 32.0f) / SIZE;
                body.ty = 0.0f;
            }
        }
        else
        {
            resetFrames();
            body.tx = 0.0f;
            body.ty = 0.0f;
        }
    }

    @Override
    public void renderTick(float lag)
    {
        HERO.bind();
        float x = Utils.interpolate(ent.getLastX(), ent.getX(), lag);
        float y = Utils.interpolate(ent.getLastY(), ent.getY(), lag);
        for(TexturePart tp : parts)
        {
            if(tp.draw)
            {
                float m1;
                float m2;
                if(ent.getFace() == Face.LEFT)
                {
                    m1 = tp.w;
                    m2 = 0.0f;
                }
                else
                {
                    m1 = 0.0f;
                    m2 = tp.w;
                }
                Shader.getTextureRenderer().drawRectangle(
                        x + tp.ox + m1, y + tp.oy, 
                        x + tp.ox + m2, y + tp.oy + tp.h, 
                        tp.tx, tp.ty, 
                        tp.tx + (tp.w / SIZE), tp.ty + (tp.h / SIZE));
            }
        }
    }
}