A method typically used for determining what the user selected.
3
votes
1answer
98 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 ...
-1
votes
1answer
108 views
Changing map 0,0 origin to top left while using D3DXMatrixOrthoLH
Thanks to Tetrad (for pointing out D3DXMatrixOrthoLH ) I have figured out how to set it up in DirectX9. However, the problem I am now facing is my 0,0 mouse position is now in the middle.
What I ...
0
votes
0answers
55 views
Why would rotating the camera effect my pick ray?
So i'm trying to get terrain picking going.
I set up my ray, and I can pick out models, or sprites, whatever I want, no problem.
But when I try and get my 3D coords based off terrain collision it ...
-2
votes
1answer
200 views
Game Editor - When screen is clicked, how do you identify what coordinate you clicked?
This is a follow-up to my earlier question:
Game Editor - When screen is clicked, how do you identify which object that is clicked?
Something I've noticed is that picking only calculates a ray and ...
6
votes
2answers
156 views
How do I convert a 2D movement (from mouse) to a displacement along a 3d axis?
I'm making a small 3D scene editor (that only allow to modify objects positions).
Each object is draw with a 3d X/Y/Z axis :
How it works : user choose an axis (X, Y or Z) by left clicking on it, ...
0
votes
0answers
100 views
How to create 3d picking ray with the cursor position
I'm new here and I'm not sure how to go about doing this. I am creating an application that is supposed to use the cursor's position in the window to perform 3d picking. The tutorials I have found ...
2
votes
2answers
199 views
Assigning a different texture based on picking
I'm making a game using XNA. I have some simple objects like cube and sphere, and I would like to change the texture of one face of these objects based on picking. That is, when the cursor is over ...
-3
votes
1answer
202 views
Isometric Rendering and Picking [duplicate]
Possible Duplicate:
Isometric rendering and picking?
I've been looking for a formula to plot (world->screen) and mouse pick (world->screen) isometric tiles in a non-diamond-shaped world. ...
1
vote
0answers
219 views
2D isometric picking
I'm trying to implement picking in my isometric 2D game, however, I am failing.
First of all, I've searched for a solution and came to several, different equations and even a solution using matrices. ...
1
vote
0answers
84 views
Numerically stable(ish) method of getting Y-intercept of mouse position?
I'm trying to unproject the mouse position to get the position on the X-Z plane of a ray cast from the mouse. The camera is fully controllable by the user. Right now, the algorithm I'm using is...
...
0
votes
1answer
241 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 ...
3
votes
1answer
234 views
Best way to Draw a cube for 3D Picking on a specific face
Currently I am drawing a cube for a game that I am making and the cube draw method is below. My question is, what is the best way to draw a cube and to be able to easily find the face that the cursor ...
4
votes
2answers
228 views
How do I use D3DXVec3Unproject with D3D11?
I'm having a small issue with D3DXVec3Unproject. I'm currently using Direct3D 11 and not 10, and the signature for this function is:
D3DXVECTOR3 *pOut, CONST D3DXVECTOR3 *pV, CONST D3D10_VIEWPORT ...
4
votes
2answers
415 views
Get world coordinate under mouse (at a ground plane for Warcraft 3 like movement)
I want to let a unit follow the mouse like in any RTS (Warcraft 3, Starcraft, ...). For that I have a "ground plane" which is defined through 2 vectors, the X and Z axis. Now I need to get the world ...
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 ...
