source: 2014/30/MikkoI/WindowsGame1/WindowsGame1/WindowsGame1/Render/MapRenderer.cs @ 5582

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;

namespace WindowsGame1
{
    class MapRenderer
    {
        //renderöi periaatteessa kaiken paitsi GUI:n. sisältää tekstuurit
        SpriteBatch spriteBatch;
        Map map;
        Vector2 screenSize;
        Vector3 sunPosition = new Vector3(0, 0, 15);

        public MapRenderer(SpriteBatch spriteBatch, Map map, Vector2 screenSize)
        {
            this.spriteBatch = spriteBatch;
            this.map = map;
            this.screenSize = screenSize;
        }
        void renderGroundTile(Texture2D texture, int x, int y)
        {//renderöi maata
            //maatilen koko on 64x64.
            spriteBatch.Draw(texture, new Rectangle(x * 64, y * 64, texture.Width, texture.Height), null, Color.White, 0f, Vector2.Zero, SpriteEffects.None, 0f);
        }
        void renderGroundObject(Texture2D texture, int x, int y, Vector2 size, Matrix matrix)
        {//renderöi maassa olevan asian (ei liiku)
            Vector2 paikka = Vector2.Transform(new Vector2((x + 0.5f) * 64, (y + 0.5f) * 64), matrix) - new Vector2(size.X / 2, size.Y);
            spriteBatch.Draw(texture, new Rectangle((int)paikka.X, (int)paikka.Y, (int)size.X, (int)size.Y), null, Color.White, 0, Vector2.Zero, SpriteEffects.None, (paikka.Y + size.Y) / (screenSize.Y + size.Y));
        }

        public void RenderMap(Camera camera)
        {//renderöi koko mapin, kutsu ulkopuolelta
            Matrix matrix = camera.getMatrix(new Vector2(64, 64), map.Size, screenSize);//mapin tilen koko 64x64
            spriteBatch.Begin(SpriteSortMode.Deferred, null, null, null, null, null, matrix);
            for (var x = 0; x < map.Size.X; x++)
            {
                for (var y = 0; y < map.Size.Y; y++)
                {
                    renderGroundTile(Pikseli.Instance.textures[map.Tiles[x, y].textureId], x, y);
                }
            }

            //varjot testi

            sunPosition = new Vector3(-20 + (float)Pikseli.Instance.gameTime.TotalGameTime.TotalSeconds + 1.42f, -20 + (float)Pikseli.Instance.gameTime.TotalGameTime.TotalSeconds, 0);

            foreach (MapObject obj in map.Objects)
            {
                Texture2D texture = Pikseli.Instance.textures[obj.textureId];
                Vector2 size = new Vector2(texture.Width, texture.Height) * camera.zoomFactor;//ditto

                Vector2 erotus = new Vector2(sunPosition.X, sunPosition.Y) - obj.position;


                float shadowAngle = (float)(Math.Atan2(erotus.Y, erotus.X) - Math.PI / 2);
                double shadowOffsetX = Math.Cos(shadowAngle + Math.PI / 2) * 5,
                    shadowOffsetY = Math.Sin(shadowAngle + Math.PI / 2) * 5;
                    
                spriteBatch.Draw(texture, new Rectangle((int)((obj.position.X + 0.5) * 64), (int)((obj.position.Y + 0.5) * 64), texture.Width, texture.Height), null, new Color(0f, 0f, 0f, 0.5f), shadowAngle, new Vector2(texture.Width / 2, texture.Height), SpriteEffects.None, 0f);
                //spriteBatch.Draw(obj.texture, new Rectangle((int)(obj.position.X + 0.5) * 64, (int)(obj.position.Y + 0.5) * 64, (int)obj.texture.Width, (int)obj.texture.Height), null, Color.Gray, MathHelper.ToRadians(30), new Vector2(obj.texture.Width / 2, obj.texture.Height), SpriteEffects.None, 0f);
            }
            spriteBatch.End();



            spriteBatch.Begin(SpriteSortMode.FrontToBack, BlendState.AlphaBlend);
            foreach (MapObject obj in map.Objects)
            {
                Texture2D texture = Pikseli.Instance.textures[obj.textureId];
                Vector2 size = new Vector2(texture.Width, texture.Height) * camera.zoomFactor;//ditto
                renderGroundObject(texture, (int)obj.position.X, (int)obj.position.Y, size, matrix);
            }
            spriteBatch.End();
        }
    }
}