All Questions
74
questions with no upvoted or accepted answers
4
votes
1
answer
3k
views
2D pixel-perfect collision detection with opengl
I'm writing a 2D, sprite-based game and I'm having a hard time with making collision detection. First of all, I am well aware of other methods and in fact I'm using Box2D's quadtree queries to filter ...
- 41
3
votes
0
answers
3k
views
OpenGL dashed line
I'm trying to draw a 2d grid in opengl which contains dashed lines. I'm using glEnble(GL_LINE_STIPPLE) / glLineStipple(...) to do so. The problem is when I'm trying to drag the scene, dashes begin to ...
- 704
3
votes
0
answers
139
views
LWJGL Inventory Rendering Wrong
So ive been working on a 2D rpg game and ive worked out the inventory quite nicely but ive ran into a problem where when I have an item in a slot the slot directly after it doesnt render; its just a ...
- 171
3
votes
1
answer
3k
views
2d shadow mapping
I have been wondering about how to implement this with openGL:
I have a map, with a flat floor and walls. Every thing here is 2d, there is no 3d geometry, only 2d poligons that compose the map.
Using ...
- 1,244
2
votes
1
answer
199
views
How to improve a look of a 2d light?
I'd like to have a nice light. I am not sure how exactly should I call it, but you'll see when I actually show some example.
What I mean by nice is like this scene:
It looks like light has some ...
- 311
2
votes
0
answers
225
views
How can I switch between 2 shaders without adding more and more draw calls?
I would like to create a renderer class that can switch between 2 or more shaders without adding more and more draw calls.
What I mean is to have 2 shaders - A and B - and method that takes shader, ...
user9546059
2
votes
0
answers
105
views
2D semi-diagonal pixel offsetting
I'm writing a fully 2d game (top-down using a 2/1 isometric viewpoint using OpenGL with an orthographic projection) in which entities often move semi-diagonally (e.g. northeast: 2 pixels to the right ...
- 319
2
votes
1
answer
481
views
OpenGL 2D collision detection isn't working
I have a 2D OpenGL game which I am trying to implement aabb collision detection in. Here is the collision detection code:
boolean collisionX = position.x + size.x + dx >= collision.position.x &...
2
votes
1
answer
3k
views
OpenGL Rendering 2D in a 3D space
Am currently working on a project as part of my coursework and realised I needed to have a HUD to display information to the user, stumbled upon glOrtho and have been trying to use it however am ...
- 93
2
votes
0
answers
302
views
Slick2D Alpha Lighting Issues
I'm writing an Alpha Map Lighting system, and I've been successful to some degree. Here is my code:
g.clearAlphaMap();
g.setDrawMode(Graphics.MODE_ALPHA_MAP);
GL11.glEnable(SGL.GL_BLEND);
GL11....
- 543
2
votes
2
answers
311
views
Depth sorting of elements drawn on the screen
I have small program here in which I am drawing some elements on the window.
class CustomPointer{
void draw(); //draw png image on the screen
};
class CustomRectangle{
void draw(){
drawRect(); //...
- 6,052
2
votes
2
answers
2k
views
Alternative to glRotatef and glutBitmapCharacter?
This is what my code is currently. However, for the life of me I cannot get the text to rotate. Do I need to use something other than glutBitmapCharacter?
Just to clarify, this is only a 2D program
...
- 73
2
votes
3
answers
5k
views
OpenGL: Drawing objects (fixed size, indifferent to zoom, and relative position) on a map
I am working on a Java OpenGL application described below.
The application shows a large 2D texture of a world map. Some information must be represented as captions on the map (for example, a caption ...
- 976
1
vote
0
answers
174
views
Access violation 0xc0000005 rendering multiple objects
Recently I have been toying with open-gl eventually I decided to give it a shot and write my very own straightforward 2d-game engine myself, unfortunately for some reason when attempting to render ...
- 114
1
vote
0
answers
361
views
How do I animate 2d legs in OpenGL to swing back and forth? C++
I have a programming assignment that one portion is swinging the legs back and forth in order to create a walking motion. To me this is what should logically work. It should be 20 steps, each loop ...
- 11