I have a car moving on a road and the camera is updating its position and target to look at the car as it moves.
I am getting the strangest world shake/jittering.
cameraOrbitControls.object.position.set(cameraPosX, cameraPosY, cameraPosZ)
cameraOrbitControls.target.set(carNewPosition.x, carNewPosition.y, carNewPosition.z)
https://youtu.be/rAJyegrYPb8
However, i have narrowed the problem down to the camera target.set() call. When i remove this line the problem goes away, but its obviously not tracking the car how i would like anymore.
cameraOrbitControls.object.position.set(cameraPosX, cameraPosY, cameraPosZ)
// cameraOrbitControls.target.set(carNewPosition.x, carNewPosition.y, carNewPosition.z)
https://youtu.be/aia90b0z67Q
It feels like there is some bad matrix multiplication going on in target.set(...). Can anyone please explain this strange behavior?
(yes i have logarithmicDepthBuffer enabled and no sadly i cannot make this into a jsfiddle)
Related
https://codepen.io/chrisjdesigner/pen/ExNPqBx
// Old Film Look
filmPass = new THREE.FilmPass();
composer.addPass(filmPass);
In this example you can see it and it's something I've been having in my own tests as well. I'm not sure if it's only tabbing out or if by leaving the computer idle it eventually turns like that.
The way to replicate it is to open the demo, leave the tab for a while and after 15 minutes or so, when you return to the tab, the noise will look displaced and forming patterns
. Chrome latest version.
My assumption is that the requestanimationframe is causing this issue, but I wouldn't know what to tweak to fix it.
Anyone got a pointer?
It appears adding a deltatime to the render alleviates the issue greatly.
I want my camera to follow my player but when i get his position in other script it just falls outThis is the image of the script the script in the inspectorPlayerCameraPos
PLS HELPP
I only know that if i disable the script nothing happens the camera rotates and it stay in its position
Your plan should work, as long as:
The CameraPos script is attached to your MainCamera. (make sure!)
The "orientation" transform is set to the CameraPos object's transform.(it is)
The CameraPos object is a child of the Player (it is)
Nothing else is interfering with your MainCamera's position. (make sure!)
The code you've shown is fine – my guess is that if it's a code error, it's in a class that you haven't shown us – especially considering you mentioned your camera was rotating, and the class you screenshotted only applied a position.
Rotation can be really tricky — if you tried the four things I suggested without luck, try sending over your rotation code and we'll see if the problem is there.
This answer provides a nice way to make smooth animations in SciLab. I now have to write a simulation of a body attached to two strings (and therefore its movement regarding some additional forces).
The code in the link works well to render movement of a single point and, unfortunately, I didn't manage to make an animation of a point + two lines using this method. If someone is curious, I tried this code to do it:
frametime=(tk-t0)/Nt//defining the waitnig time
plot(Y(1,1),Y(2,1),"o")//plotting the point
plot([0;Y(1,1)],[0;Y(2,1)],style=1)
plot([D;Y(1,1)],[0;Y(2,1)],style=1)//plotting the two initial lines
h1_compound = gce();
h_point=h1_compound.children
h_point.mark_size = 20;
h_point.mark_background = 2;
h_line1=h_compound.children
h_line2=h_compound.children
//h_axes = gca();
//h_axes.data_bounds = [0,-1;10,1];
realtimeinit(frametime);
for i=1:Nt//my vectors have Nt points
realtime(i);//wait "frametime" seconds before drawing the new position
h_point.data=[Y(1,i),Y(2,i)];
h_line1.data=[[0;Y(1,i)],[0;Y(2,i)]]
h_line2.data=[[D;Y(1,i)],[0;Y(2,i)]]
end
The question is: is there any way to make an animation of three shapes without making axes blink (as it is with the window refreshment) or other wierd stuff?
Since you didn't create a MCVE I can't reproduce your exact problem. But you may try to add drawlater(); before, and drawnow(); after your data modification to see if it does help with blinking or not.
Or you may get much better looking result by saving your plots in every round with xs2gif and assemble the animation with another gifmaker progam (there are free online sites to do this, however with some limitations). If you need to present your result, you should do this step anyway.
I am using r82.
I have a mesh with multiple materials. I can change their opacity just fine, but how they are rendered is what I would call "splotchy". I have been using ThreeJs for a while, and EDIT: was able to get the transparency working in a past version (r67) with the same model in a significantly more consistent way. So I was wondering if there is something that now I need to set that I didn't need to set before or if I am just overlooking something. Upon revisiting my older code and testing it again, I found that the same transparency issues were present. It was simply a matter of there not being as obvious "splotches" (and not testing enough, I'm sure). Here is a screenshot.
Here are a few more pictures I took that highlight the issue a bit better. I have the outside wall in a light grey and the floors a dark grey in the model and can toggle the outside walls to be visible or not. In these pictures I have one face of the outside wall purple and a face of the floor in the room on the other side of the wall green.
Based on the angle of the camera, it makes part of the green floor face invisible even though there is only one face between the camera and it.
The materials are all double sided already and there is no sign of this until the transparency is on. I found a similar question that suggested changing the mesh.setFaceCulling (or something similar) but that seemed to be from an older version and wasn't in r82.
Thanks for any help in advance!
EDIT:
I started looking into the old version of threeJS and the current version's source code to see what is done differently regarding transparency. I found transparentObjects, which is an array of the objects (I believe faces) that are going to be rendered and are in sorted based on "reversePainterSortStable". There is another list of objects (I believe for the materials objects, maybe?) called opaqueObjects that uses "painterSortStable". So to see if changing the sort order would change the outcome of how things are looking when transparent I changed it so that transparentObjects got sorted by "painterSortStable" and it did change how things showed up significantly (granted it didn't fix my problem since it just removed some problem spots and created new ones).
So the short version, it looks like it is an issue with the renderOrder of the faces.
That being said, I tried finding how the r67 version of the code handled the "renderOrder" of the faces since it wasn't something that (to my knowledge) could be set in that version and just did it automatically. But I have had no such luck tracking down how it was done as of yet.
So I see two possibilities. 1) find out how the past version correctly did transparency (at least for my purposes) and change the logic in the current version to use that. Or 2) find how to properly set the renderOrder of the faces based on the camera position in the scene. Will look into the second option first, but figured it would be good to document this for others looking to help answer or that have a similar problem.
EDIT 2:
So digging through the source code for threeJs and noticed something about the transparentObjects array I mentioned in the previous edit. The first, that I cannot for the life of me figure out how it gets populated since it doesn't seem like it is added to anywhere in the code. The second is that I think it is being populated with duplicates of the entire building object/mesh (see screenshot below).
The z indexes all seem to be the same. as well as the ids and the objects are all of type "mesh" (of the ones I looked through, granted, since there are a few thousand). So I was going to figure out why its adding what is being added to the array, but that is when I stumbled across the issue of not finding where in the code that the transparentObjects array actually get populated.
EDIT 3:
WestLangley, I tried setting the depth test for the outer wall material to false and got this. Like I said in my response comment, even if it did work it wouldn't fix the issues experienced with the camera inside the building, but wanted to follow up none the less (see snapshot below).
Ok, so I've been working on a game with some friends for a school project. We have used SFML.
I've been working lately on the camera and a tile implementations system and now I need them to work together.
The camera works like this:
I have two different sf::View, one for the game world and one for the hud. The one for the game world follows the player in the x-axis.
The tile system works in a way where it reads in a txt file and draw sprites based on the information from the txt file.
As it is now I always draw all the tiles, even if it's outside of the cameras view. Not good. I need a way to check if the tiles are outside of the cameras view before I draw them. How do I do this?
I did find this:
Get X and Y offset of sf::View
but I can't really wrap my head around how to make this info work in my game.
Any help would be really appreciated! :)
Mvh Elis
Managed to figure it out after finding this:
http://fr.sfml-dev.org/forums/index.php?topic=10590.0