Tagged Questions
3
votes
1answer
117 views
Picking 3D with OpenGL ES 2
I'm trying to implement picking in my framework but I don't understand how I can do this.
I'm working with:
OpenGL ES 2.
GLM mathematic library.
What I have understand, picking can be made with ...
0
votes
1answer
245 views
Color Picking Troubles - LWJGL/OpenGL
I'm attempting to check which object the user is hovering over. While everything seems to be just how I'd think it should be, I'm not able to get the correct color due to the second time I draw ...
2
votes
1answer
292 views
OpenGL 3+ Range Picking
How do I perform range picking in the latest OpenGL version? By range picking I mean selecting all objects which are picked using a selection rectangle, like in an RTS game.
For single object picking ...
3
votes
1answer
296 views
3d Picking under reticle
i'm currently trying to work out some 3d picking code that I started years ago, but then lost interested the assignment was completed (this part wasn't actually part of the assignment).
I am not ...
6
votes
1answer
144 views
Excluding Background from Color Picking
I've implemented picking based on color coding, but I don't want the background color to be pickable. Is there any way in openGL (2.x) to exclude the background color? For some reason, doing ...
1
vote
1answer
153 views
Why is texturing interfering with my ID-based picking implementation?
Today I came across a tutorial about color picking and I implemented it on my machine. But there is a problem: when I disable the texture and draw the object I want to pick with its picking color, it ...
0
votes
3answers
2k views
3D picking lwjgl
I have written some code to preform 3D picking that for some reason dosn't work entirely correct! (Im using LWJGL just so you know.)
I posted this at stackoverflow at first but after researching some ...
3
votes
1answer
849 views
Opengl-es picking object
I saw a lot of picking code opengl-es, but nothing worked. Can someone give me what am I missing?
My code is (from tutorials/forums)
Vec3 far = Camera.getPosition();
Vec3 near = ...
1
vote
1answer
2k views
Picking objects with mouse ray
I simply want to pick a few spheres in my scene using the mouse-ray. I have implemented(copied most of it but with little understanding) a ray-sphere collision code. Also I have implemented the code ...
3
votes
1answer
635 views
Ray picking - get direction from pitch and yaw
I am attempting to cast a ray from the center of the screen and check for collisions with objects.
When rendering, I use these calls to set up the camera:
GL11.glRotated(mPitch, 1, 0, 0);
...
3
votes
2answers
4k views
How do you determine which object/surface the user's pointing at with lwjgl?
Title pretty much says it all. I'm working on a simple 'lets get used to lwjgl' project involving manipulation of a rubik's cube, and I can't figure out how to tell which side/square the user's ...
