0
votes
0answers
17 views

How to correctly handle collision resolving with the MTV of Separating Axis Theorem?

I am making a top-down 2D game. I am in the process of implementing SAT for better collision detection and resolving (which seems to be resulting in one problem after another). Since I am in the ...
1
vote
1answer
49 views

How to rotate vertices of 2D shape using a transform matrix?

I am making a top-down 2D game and am currently working on implementing improved collision using SAT. I programmed a Shape class with a Vector2 center that is its position in world space. On top of ...
0
votes
1answer
97 views

How do you make a bullet ricochet off a vertical wall?

First things first. I am using C# with XNA. My game is top-down and the player can shoot bullets. I've managed to get the bullets to ricochet correctly off horizontal walls. Yet, despite using similar ...
2
votes
2answers
58 views

How to use camera transformation without depending on (1,-1) scale during spriteBatch.draw()

I am creating a 2D platformer type game in XNA. I currently have a camera object, with a position/rotation/zoomlevel that I use to generate a transformation matrix to pass to SpriteBatch.Begin(). ...
-1
votes
0answers
43 views

2d top down tank movement

I am trying out an idea of a tank like movement in a top down 2d game. I'd like to: get the float values of both left and right triggers I have from an xbox controller (float values from 0 to 1). I ...
0
votes
1answer
102 views

Change the sprite of a Object in Unity

Inside the script code of the the hero(object) I want add the possibility to change its sprite. So the player hits the space button and the sprite changes into the other sprite already added to the ...
0
votes
1answer
98 views

Tile System with moving Platforms

I am using a tile based system where the level is stored in a char: char[,] Level2 = {{'.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.'}, ...
0
votes
2answers
186 views

Unity 2d: How stop movement when object hit a wall

I created a square that slides on a flat ground. public class PlayerMoveScript : MonoBehaviour { float move = 0; void Start (){} void FixedUpdate () { if (move == 0) { ...
2
votes
1answer
86 views

XNA: Non-overlapping shadows

I want to create an effect similar to the following in XNA / MonoGame: There's a background and a semi-transparent shadow consisting of several objects (two circles in this example). However, the ...
0
votes
1answer
459 views

Switch character to play animation() in Unity3D using c# [closed]

I have two or more 2D character (Character A, B, n..). I made an animation on the character using the Animator class "AnimCharacter.cs". if i press the 'PgUp' character 'A' can call the function ...
1
vote
1answer
105 views

Unity seperation of prefabs with two dimensional terrain generation

I have the following function: public void Spawn () { GameObject g = ((GameObject)Instantiate (hills [Random.Range (0, hills.Length)], new Vector3 (0.0f, ...
1
vote
1answer
149 views

Strange collision behaviour in 2D game even though the collision is very basic [closed]

I have a player ship (cube) and some enemy laser projectiles. When the player ship has position X values greater than 1, collision with the enemy projectiles occur but when it has lower X values, the ...
1
vote
2answers
137 views

XNA blurring moving images

Why does XNA blurs the images which moves less than 1px in between two draws? It is quite annoying, because everything looks really blurry. Is there a way to disable it? I have tried to set the ...
2
votes
1answer
106 views

Unity Get corners of camera in world space

I'm making a 2D game and i need to get the corners of the camera in world cordinates. Is this possible in unity?
0
votes
1answer
146 views

XNA 2D Camera, zoom into player

My 2D camera follows the character fine without any zooming. However, when I tried adding a zoom feature using the Matrix.CreateScale(), the camera no longer follows the character properly. public ...
2
votes
1answer
124 views

2D lighting causes black rings to appear

A year ago I implemented 2d lighting in XNA using sprites. The sprites I used were created by placing a soft white photoshop brush on a transparant background. The result was this: (lights only) ...
2
votes
1answer
113 views

How to smoothly track and draw player movement?

I am currently using C# XNA Framework to simply connect some development concepts that I've learned/used over the past few months. Right now I have a Web Service that keeps track of connected clients ...
1
vote
1answer
83 views

Better way to handle ordering and visibility of renderable objects?

I'm just wondering whether there is a more effective way to handle the ordering and visibility of renderable components that fits into the design of my already existing engine. How I do it now: In ...
0
votes
1answer
53 views

Farseer Circle Body Problems, Please help!

I have created a circle body class, but in game my player body just passes through it. the circle will not move, only rotate. however when i create the circle body just straight up, raw in the game1 ...
4
votes
2answers
618 views

How do I make a 2D game resolution independent?

I'm working on a simple 2D game. I've finished the mobile phone version. However, my boss wants the game to works on his RT. I'm doing the "conversion" but my buttons are in the wrong places, because ...
1
vote
1answer
204 views

Lighting Covering Up Sky ( XNA / C# )

I have a 2D tile-based lighting system which is drawn onto a Render Target. I am also drawing a background which involves mountains, sun/moon, and clouds. There is also the unlit game; blocks, ...
0
votes
1answer
132 views

Efficient approaches to updating adjacent grid tiles when one tile is disabled?

I'm trying to update the surrounding grid of tiles if one of them is disabled (not removed). For example, imagine we have a grid of tiles each with x representing one texture: x, x, x, x, x, x x, x, ...
2
votes
2answers
810 views

Algorithm for continuously generating a tile map for a topdown 2D game? [duplicate]

In essence, what I'm looking for is a procedural 2D tilemap continuously generated in a fashion like Minecraft - which is to say generated as the player approaches the edges of the already explored ...
0
votes
1answer
109 views

Why do I get an exception when accessing my sprite members in this fashion?

I'm getting a NullReferenceException error on the line where I do new Vector2(...). I think the problem is with the variables I'm using even though they're working to control the player sprite, so ...
1
vote
1answer
253 views

Grid-Based 2D Lighting Problems

I am aware this question has been asked before, but unfortunately I am new to the language, so the complicated explanations I've found do not help me in the least. I need a lighting engine for my ...
0
votes
1answer
134 views

Obtain rectangle indicating 2D world space camera can see

I have a 2D tile based game in XNA, with a moveable camera that can scroll around and zoom. I'm trying to obtain a rectangle which indicates the area, in world space, that my camera is looking at, so ...
1
vote
1answer
158 views

How could I figure out the shortest way to turn, and whats the angle? [duplicate]

I'm creating some robots for my tank game. I want them to find each other and shoot each other down, so I'm trying to implement a way for them to turn towards each other, and turn the shortest way. ...
2
votes
2answers
248 views

Large resolution differences

I want to develop a game on multiple devices such as PC, Android or IOS. Want it to be in 1080p, but that means a massive scale down for the smartphones. I know how to do that, just render everything ...
0
votes
1answer
129 views

Formula throwing a ball to destination [duplicate]

I am throwing a ball using this: double v, vx, vy, alpha, t2 = 0; if (Keyboard.GetState().IsKeyDown(Keys.Up)) { alpha = MathHelper.ToRadians(60f); v = ...
-4
votes
2answers
377 views

2D Graphics in CMD in C#

So, almost every programmer used Doom as inspiration for new Projects, right? So Doom and other classic MS-DOS game were played on something like Command Prompt. How do you display images in Command ...
1
vote
2answers
225 views

XNA spritebatch.Draw: Which part gets colored by the color parameter?

Which part gets colored and how can I control it? I have a rounded block and my goal is to have the center filled with a certain color chosen by that parameter. Here's the picture: ...
4
votes
2answers
150 views

What's involved in resetting the graphics device?

I'm playing with XNA 4.0, VS2010. I've created a window (not maximized) and drawn some sprites. All is good until I resize the window, after which the sprites stop displaying or only partially ...
1
vote
3answers
327 views

Splitting tileset into individual tiles

I'm trying to split a tileset (from here) into individual tiles. For debugging purposes I wrote some code to split the tileset into individual tiles and display them on screen, but some aren't being ...
1
vote
2answers
555 views

Resolving 2D Collision with Rectangles

For about a week I've been trying to grasp the basics of collision, but I've been driven to the point of wanting to just give up on everything when it comes to collision. I just don't understand it. ...
1
vote
3answers
187 views

Creating an update “Tick” on tiles for simulating growth of plants

In my 2D tile based platformer I have added plants to be able to farm such as the simplest, grass, to other things like corn. Now each of these speacial tiles must be updated to show how much it has ...
7
votes
1answer
663 views

Implementing water effects (splashes) into XNA 4.0 game [closed]

I am creating a 2D XNA game and came across a tutorial on adding water effects (splashes) to an XNA game but after implementing it into my game I can't get it to scale down. Currently it takes up the ...
-3
votes
1answer
518 views

2D XNA Shooting Game [closed]

im doing a XNA game for a school project but im having trouble with the bullets. I can´t find any way to draw them or "invoque" them went i want. It is a modified Space Invaders that im trying to do. ...
-2
votes
3answers
646 views

Why use textures that are Power of Two? [duplicate]

Possible Duplicate: Why are textures always square powers of two? What if they aren’t? I am using C# and XNA (also MonoGame for other platforms than Windows) to create a game in 2D. ...
5
votes
2answers
424 views

Ball bouncing infinitely and constantly

Alright, so I've got hold of some simple physics mechanics, and am currently trying to implement bouncing. Based on the first answer of this question, I've developed the following algorithm: ...
3
votes
1answer
182 views

Figuring out which direction my object is facing on a 2D plane?

My friend and I were messing around in XNA 4.0 making a 2D racing game. Kind of like this one: Ivan “Ironman” Stewart’s Super Off Road. The problem we are having is knowing which direction the car is ...
0
votes
1answer
133 views

Separating Axis Theorem fails at certain angles

I'm currently attempting to add an overlap tester for an axis aligned and orientated bounding box but the solution only seems to work accurately when the OBB's angle is between -10 and +10. As the ...
0
votes
1answer
231 views

Iterating 1D array and getting 2D tile position

I know I'm missing something very obvious here, but I have a 1D array that contains integers.I have a map that is 30 x 30 and the center coordinate is 0,0 (This is actually 3D, but I'm essentially ...
35
votes
3answers
7k views

2D water with dynamic waves

New Super Mario Bros has really cool 2D water that I'd like to learn how to create. Here's a video showing it. When something hits the water, it creates a wave. There are also constant "background" ...
0
votes
1answer
166 views

Storing large array of tiles, but allowing easy access to data

I've been thinking about this for a while. I have a 2D tile bases platformer in XNA with a large array of tile data, I've been running into memory problems with large maps. (I will add chunks soon!) ...
2
votes
2answers
524 views

2D Selective Gaussian Blur

I am attempting to use Gaussian blur on a 2D platform game, selectively blurring specific types of platforms with different amounts. I am currently just messing around with simple test code, trying to ...
1
vote
3answers
438 views

Making an AI walk on a NavigationMesh (2D/Top-Down game)

For some time I have been working on a framework which should make it possible to generate 2D levels based on a set of rules specified by level designers. You can read more about it here as I won't go ...
1
vote
1answer
168 views

this.BoundingBox.Intersects(Wall[0].BoundingBox) not working properly

I seem to be having this problem a lot, I'm still learning XNA / C# and well, trying to make a classic paddle and ball game. The problem I run into (and after debugging have no answer) is that ...
4
votes
1answer
1k views

2D Tile Game - Smooth Biome Terrain Transitions

While working on my 2D tile based game, I encountered a problem. I use Perlin Noise to generate the terrain. Some biomes (Desert, Forest, etc) have different flatness values depending on terrain, ...
-2
votes
2answers
394 views

Realistic Jumping [duplicate]

Possible Duplicate: How can I implement gravity? I want to make the jumping that my character does more realistic. This is what I've tried so far but it doesn't seem very realistic when the ...
-2
votes
1answer
349 views

C# XNA 2D Multiple boxes collision detection and movement

Hi, I've been making simple game where you shoot boxes that are coming towards you. All game objects are simple rectangles. Now I have problem with collision detection; how to check where the ...