The rectangle tag has no usage guidance.
1
vote
3answers
80 views
What's the most efficient way to find the position of a point in relation to corners of a rectangle despite rectangle's scale
I am struggling to achieve the following with C# (in Unity). I need to find the position of the points that lay at a given distance (let's say 1m) from the corners of a rectangle, in a way that the ...
8
votes
4answers
199 views
How do I interpolate around a rectangle?
I want to make a fancy animation where a point travels around a rectangle. I want to find the point's position at a time t.
The rectangle is given by X, Y, Width and Height.
Is there an algorithm ...
1
vote
1answer
36 views
My intersect detector isn't working
I'm trying to create rooms dinamically by creating them in random places and checking if they do overlap each other. The idea is that if the new room intersects with another one, it must be recreated ...
2
votes
2answers
31 views
Getting the topleft, topright, bottomleft and bottomright points of a shape in Unity3D?
I have a 4-point shape that is defined in screen space by the user.
They can draw the 4 points, one at a time, in any order they wish.
I am using a List of Vector2's to store the screen co-ordinates ...
0
votes
2answers
88 views
XNA Rotating a Rectangle?
I am in the process of making a giant shooter game and I have got to the point where I needed to use rectangles to detect bullets and giants hitting the player. I did that however, if you look at this ...
0
votes
1answer
89 views
LibGDX collision with rectangle and circle
I have 2 objects, A and B, both are classes with only values, so positions and dimensions are only values (float posX,posY).
I have a render class which render A and B with shapeRenderer; A is ...
0
votes
2answers
158 views
Java 2D Game Hitbox Detection & Rounded Corners
I am working on a simple 2D game with Java, swing and no framework. I have a rectangular player that the user can move around. On the map are few obstacles which the player should not be able to go ...
0
votes
1answer
75 views
Handling collision with LWJGL rectangles
I'm testing collision with other rectangles so I can implement it into my current project. The problem is the rectangle starts at the right x and y, but I'm not sure where exactly they are. I'm pretty ...
1
vote
3answers
59 views
XNA - How to use One Rectangle in sprites for collisions
I'm new to XNA and game development in general. If I want to make an object solid so my character cannot pass through it, I would use several Rectangles to make the collision more "realistic"
What I ...
0
votes
1answer
55 views
Aligning Camera to Rectangle
I'm working on a game in Java, and I'm having some trouble with finding the correct camera position. I've already made a Rectangle that shows exactly where I want the camera to be, and at what scale:
...
0
votes
1answer
76 views
Array Rectangle Collision Handling Inconsistency XNA 4.0 [closed]
I made a simple collision detection prototype.Here's the code for the Player class's collision handler:
public void handleCollision(GameObject OtherObject)
{
...
0
votes
1answer
174 views
Best way to go about collision between rectangle and bool array containing pixel data?
Basically, if I have an array along the lines of
bool[] collision;
Filled with a value for each pixel in the sprite I am checking collision against (pixel 1 = true, pixel 2 = false etc), how do ...
1
vote
1answer
54 views
Positioning of AABB / Rectangles
I am wondering what is the best way to position rectangles, the ways I have thought of are:
Have an x and y at upper left, then have a width and height
Have an x and y at upper left, and an x and y ...
-1
votes
1answer
1k views
C# XNA - How to animate using Texture Atlas/ Sprite Sheet
I have a problem which I need to resolve. I am making a Space Invaders game in C# XNA. I've been following this tutorial for the Invaders: ...
1
vote
3answers
2k views
How to calculate corner marks of a rotated rectangle?
I've got two elements, a 2D point and a rectangular area. The point represents the middle of that area. I also know the width and height of that area. And the area is tilted by 40° relative to the ...
0
votes
2answers
104 views
Quick algorithm to identify undrawn rectangles inside a map
I already have a working algorithm for this but it's home-made and there is some redundancy in the things it checks, so I'm looking for a fast algorithm (or the name of it) that would detect undrawn ...
0
votes
3answers
86 views
If player leaves a rectangle take him back to his previous position
Okay, I'm making a game. The map contains all the blocks/buildings/structures etc... The map is bordered by a rectangle.
So what I want is if the player attempts to exit the rectangle he goes back to ...
0
votes
3answers
102 views
How to find the total bounds rectangle around a list of rectagles
Rectangle object: a simple data structure of 4 floats (w,h,x,y).
I have an array of 2 or more rectangles and want to create a rectangle that surrounds all of them:
The result rectangle, calculated ...
3
votes
2answers
579 views
How can I tell what a rectangle intersects with?
I understand XNA's Rectangle class is rather limited, but surely there is a way to tell what a Rectangle is intersecting with?
If I had Rectangle boundingBox = new Rectangle(stuff here); how would I ...
0
votes
1answer
140 views
How can I determine if an object hit the top of a tile rectangle in MonoGame? [duplicate]
I've been implementing an AI system in my 2D game using MonoGame.
In some situations when a collision between two objects occurs, I need the NPC to move in different directions depending on the ...
0
votes
2answers
535 views
2D Rectangle Collision
I want to make a small 2D game.
In the game you can go in all directions(with the bird's-eye view) and can shoot.
(A little bit like BoxHead http://de.y8.com/games/box_head_2play)
My problem there is ...
1
vote
1answer
631 views
Get screen bounds of 3D object
I'm trying to draw a 2D plane that has minimum dimensions to contain a 3D model (a sphere). How do I calculate the minimum size and position of the rectangle to completely cover a 3D model on screen?
2
votes
2answers
116 views
Intersection of a point and rectangle
I have a mouse cordinates in 2D game (x and y) and a rectangle (x,y, width,height).
How to find if the point is in the rectangle? I do not have any code to post here. I'm just searching for help.
0
votes
2answers
442 views
How to properly translate a point by a matrix?
I wrote a simple Matrix class and it has methods like rotate, translate, etc. They all seem to be working, but whenever I try to translate a rectangle using the matrix, the translation axis seem to be ...
2
votes
1answer
189 views
Getting a uint color array from a portion of a Texture2D
I'm currently using the Farseer tools to create a body from a Texture2D. However, my texture is a spritesheet and I need to get the uint array containing the colors from a portion of the full ...
1
vote
2answers
954 views
Find the Contact Normal of Rectangle Collision
It seems a lot of people have asked similar questions on this site, and every time it seems like a whole bunch of answers that don't work are given.
Basically, I have two rectangles (AABBs) that ...
2
votes
3answers
1k views
Creating Rectangle-based buttons with OnClick events
As the title implies, I want a Button class with an OnClick event handler. It should fire off connected events when it is clicked.
This is as far as I've made it:
public class Button {
public ...
-4
votes
1answer
237 views
Can't add rectangles into rectangle list [closed]
When i run this code, it gives me "Object reference not set to an instance of an object."
here
clickableArea.Add(temp);
here is the entire class
using System;
using System.Collections.Generic;
...
0
votes
2answers
219 views
Draw Rectangle To All Dimensions of Image
I have some rudimentary collision code:
public class Collision {
static boolean isColliding = false;
static Rectangle player;
static Rectangle female;
public static void collision(){
Rectangle ...
2
votes
1answer
266 views
Reacting to rectangle on rectangle collisions
I don't know how to react to collisions between two axis aligned rectangles that have x, y, width and height values (x and y are from the centre of the box) to make them simply not overlap.
I figured ...
9
votes
1answer
9k views
a simple 2D rectangle collision algorithm that also determines which sides that the rectangles collide?
I initially tried out implementing rectangular intersection, which works well. However, when I have to apply the physics system, such as velocity, acceleration, and directional vectors, I would have ...
-1
votes
1answer
170 views
Find a Rectangle by coordinates - XNA
I have 2 coordinates (X,Y). I have also a 10x10 array. By these coordinates I have to find the rectangle in which is my pointer at the moment.
How could I handle it?
-2
votes
2answers
219 views
C# XNA 4.0 Rectangle Rotation Collision
I can easily rotate my sprite, but how could I rotate my rectangle for my collision (Thinking of using the Separating Axis Theorem, But I have no clue how to apply it) Help or Example would be ...
4
votes
1answer
183 views
XNA4 - Trouble updating part of a Texture2D
I have a big Color[] ColorMap in memory (1280x720), and I have a Texture2D that I've uploaded this ColorMap to.
I update parts of the in-memory ColorMap, and want to upload those changed parts to the ...
0
votes
2answers
4k views
Android Java rectangle collision detection not working
I had been hard coding a collision detection system which was buggy. Then I came across using rectangles for collsion detection. So I put it all in and it does not work, I put a log in and it never ...
3
votes
1answer
2k views
Create a rectangle struct to be rotated and have a .Intersects() function
In my XNA program, I am trying to swing a sword. The sword starts at an angle of 180 degrees, then rotates (clockwise) to an angle of 90 degrees.
The Rectangle struct that XNA provides,
Rectangle ...
6
votes
1answer
968 views
XNA Platformer Collision: PerPixel vs Rectangle
I'm writing a platformer engine with XNA and was wondering what method for handling collisions I should use. Would I be seeing some performance issues if I were to try and have PerPixel collisions? ...
6
votes
4answers
1k views
Find the closest point along a rectangle, given an another point and direction
Given a rectangle, and a point with a vector direction towards the rectangle.
How can I find the closest point on the outside of that rectangle to the point in question?
