# All Questions

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### SSAO and normal issues

I'm using a SSAO alghorithm called "SAO", seen here: Scalable Ambient Obscurance. I'm currently having issues with "smooth" normals, for example when using normal/height maps. To ...
433 views

### Spherical Area Lights do not match reference

So I'm adding spherical area lights to my application, and comparing my results with mitsuba, I am getting some differences (left is my approach, right is mitsuba - a pathtraced reference): What I am ...
978 views

### How to hide a post-processed mesh outline when/where the mesh is hidden

I'm working on setting up an active outline in my 3d engine, a highlight effect for selected 3d characters or scenery in the screen. After working with the stencil buffer and getting some ...
170 views

### Why Can't I duck reverb on the mix bus in Unity?

i'm surprised there is so little documentation on this issue. But i'm trying to duck the audio on all the mix buses in Unity so that you can clearly hear the VO of the game. Now it works great except ...
4k views

### Preventing a Combination of Rigidbody Jump Force & Bounce Magnitude in Unity3D

I'm building a fairly simple marble racing game in Unity3D. The ball is a 3D physics object that moves only on the X and Y axes. It has the ability to roll left and right, and to jump. Pretty basic ...
510 views

### UDK: Checking actor type in projectile ProcessTouch

So, to be brief, I'm trying to teleport a pawn when it's struck by a projectile (or damaged by any weapon in my game.) Right now, I'm trying to just call Pawn.SetLocation in the projectile's ...
377 views

### Environment mapping without cubemap (need coordinates projection)

I'm working on a project with C++ and glsl (4.1). I have implemented a mirror object which is a plane at height 0 that works as follow: I render the scene with a MVP computed such that the camera ...
418 views

### Implementing a SceneManager using OpenFL

I'm trying to implement a basic SceneManager using OpenFL and Haxe. I don't have a lot of experience using OpenFL and Haxe so I have a few problems. Here is how I designed the SceneManager class: <...
1k views

### How do I reconstruct depth in deferred rendering using an orthographic projection?

I've been trying to get my world space position of my pixel but I'm missing something. I'm using a orthographic view for a 2.5d game. My depth is linear and this is my code. ...
620 views

### How can I compensate for camera rotation changing PCSS penumbras?

I am implementing PCSS and I am using a directional light. The directional light volume is clamped to the camera frustum (as is typical with directional lights). So when the camera rotates, the ...
2k views

I have a scene with a massive terrain. It took a long time to load (approximately 60 seconds) when I pressed play. I am in the editor. I prefabbed it. Now it only took about 5 seconds to load when ...
257 views

### How to move a portion of bezier/spline curve along its complete bezier/spline curve?

Based on the image below, I have a curve (orange) which is a bezier sub-curve of an original curve (longer black curve). The original curve consists of a number of cubic bezier curves joined together. ...
856 views

### How to create skeletal animation data for a skirt?

Please think of this in an engine-agnostic way first, and then we can talk about specific engines. In my game, I have a 3D character which is wearing a hakama (think of it as a long pleated skirt). ...
1k views

### Libgdx black rectangles problem

I'm working on a game for Android using Android Studio with LibGDX in Java. I recently found a weird problem when closing and reopening the game. When I first open the game, it works fine. If I click ...
2k views

### NegaScout with Zobrist Transposition Tables in Chess

I'm trying to put Transposition tables into my alpha beta scout. I do see an incremental speed boost I think toward mid or late game, however, even with a table size of 1-2GB, its may or may not be ...
1k views

### Why the AnchorPoint doesn't affect the CCLayer Positioning?

I think there is a difference between the CCLayer and CCNode behavior when I change their AnchorPoint. I will describe what I mean and please somebody explain it. Scenario: I start with ...
1k views

### Using PhysX, how can I predict where I will need to generate procedural terrain collision shapes?

In this situation, I have terrain height values I generate procedurally. For rendering, I use the camera's position to generate an appropriate sized height map. For collision, however, I need to have ...
2k views

### Creating a curved mesh on inside of sphere based on texture image coordinates

In Blender, I have created a sphere with a panoramic texture on the inside. I have also manually created a plane mesh (curved to match the size of the sphere) that sits on the inside wall where I can ...
1k views

### How can I Implement spin in billiard game?

I'm not sure that you played billiard or snooker before.if you played you should know about spin. but anyway if you don't know about it you can see it in this video I want to Implement spin like this ...
188 views

### How to create an illustrator/photoshop-like pentool for creating bezier curves in Unity

I found a very useful bezier curve creation code here, which I am using. I need to create complex segmented bezier curves so I want update the code to create illustrator/photoshop-like pen tool bezier ...
634 views

### How to link assimp lib to universal app

I cannot make assimp object loader work with universal app, and I got the same problem as this one: Assimp and directX12 universal apps I tried the static library approach mentioned in the answer of ...
337 views

### How to draw Shadow Volumes in one draw call?

I've got a simple app that draws 3D cubes using instance rendering and I'm implementing Shadow Volume. Each cube's vertex, uv, normal and index data are statically stored in 4 vertex array buffers. On ...
442 views

### Why isn't my cbuffer updating?

I am really frustrated because my cbufer isn't updating. This is my VS: ...
1k views

### How do I make volumetric grass?

I've been extremely interested in volumetric technology, especially for grass. Online resources are extremely scarce on this topic. What is the difference from creating a lot of mesh billboards? ...
1k views

### LibGDX Box2D Lights - Illuminate background

I have a box2D world made of tiles. I use a custom DirectionalLight for light up the scene from above (It shines through transparent blocks [eg.: the water] more deeply). The problem is (as expected), ...
1k views

### Collision detection between draggable object and world objects?

I have a game I'm making in Javascript that will involve combining items by dragging and dropping them onto each other. Think Alchemy or similar. So far, so good, but I hit a snag while trying to ...
693 views

### Understanding how texCUBE works and writing cubemaps properly into a cube rendertarget

My goal is to create accurate reflections, sampled from a dynamic cubemap, for specific 3d objects (mostly lights) in XNA 4.0. To sample the cubemap I compute the 3d reflection vector in a classic ...
535 views

### Shrink a convex polygon

Shrinking a concave polygon is quite hard, to do well. But I expect shrinking a convex polygon would be easy. The naive approach of moving each vertex a certain distance to the centre gives me poor ...
719 views

### Android libGDX FreeTypeFontGenerator exception

I am working on a libGDX project for Android. Since I added the following code, running the game on my Android phone produces an exception: ...
149 views

### How to draw text with characters rendered in reverse order in a Godot game?

I need to have some text showing up in my Godot game in a way that each character overlaps the character directly to its right, like so: ...
1k views

I'm trying to achieve in Godot something similar to cavity effect from Blender (this can be enabled in viewport options; cube on the left is displayed by viewport with this option enabled): How would ...
248 views

### How to set the camera projectionmatrix so that it's 4 rays always exactly hit the corners of a defined plane?

I have a camera, and I have a plane. The plane has 4 corner points. I need to find out how to change the projection-matrix of the camera so that the projection-rays of the camera always hit the ...
75 views

### How can I make sure my OpenCL code works correctly on different graphic cards?

I'm testing on adding some OpenCL code in my game, but I only have a single Nvidia card & I'm not sure the code will run normally on other platforms. Is there any way to make sure my code runs ...
346 views

### Adding functionality to make individual anchor points of bezier continuous or non-continuous

I am creating bezier curves with the following code. The curves can be extended to join several bezier curves by shift clicking in the scene view. My code has functionality for making the whole curve ...
111 views

### How many Pipelines in a Typical Rendered Scene DirectX12

I'm learning DirectX12 right now and I'm missing a few pieces of the puzzle in my own head on the overall structure of how you would setup a game. Specifically, I'm trying to get an idea of how ...
1k views

### How do I draw a name above monsters head?

My player HUD works perfect, but when I move, the monster name moves with me instead of getting attached to the monster. Player has a HUD and I'm using Scene2D.ui ...
8k views

### Handling movement on sloped surfaces - clamping character to sloped surface

I've noticed that a lot of people seem to have this issue but I've yet to find an actual working solution - when a rigidbody-based character controller (I'm not using Unity's character controller) ...
647 views

### How to correctly implement 'layered lighting' with Box2D-Lights

How does one only allow Box2D-Lights to affect one and only one OrthographicCamera. After researching, I found the following answer. This answer goes into detail ...
757 views

### Implementing proportional navigation in 3D

Good afternoon guys, a = N * λ' * V is the formula for the commanded acceleration required to hit the target, where N is the proportionality constant, λ' is the change in line of sight and V is ...
703 views

As irradiance map is generated for every possible normal for all the texels in environment map (as every texel act as a light source) so that we can look up irradiance map, based on normal of fragment ...
1k views

### LibGDX: Is it necessary to set a stage as an input processor when creating a touchpad?

I mean, I've been searching it, they always use set a stage as an input processor after they had added the Touchpadto the Stage ...
773 views

### Draw Edges in OpenGL

I use blender game engine and blender uses OpenGL for graphics. How can I draw lines around all 3D objects? Would this be a job for a filter? Mainly, I want my end result to look drawn. I found this: <...
498 views

### On Android, How can I avoid FPS drops during sensor listener setup/tear down?

When I open my Android app after 5 or 10 seconds it sets up the sensor listener, during which I see clear stuttering and the FPS drops for a second to 40 instead of 60. Is there a way to avoid this? ...
304 views

### Lidgren not starting server properly

I have a server set up for my game with Lidgren, and it works well when I have it set up on one machine, but if I try to run the server on another machine, I am unable to connect from other machines. ...
3k views

### Drawing fonts with LWJGL3 with OpenGL

I'm very sorry if this question has already been answered, but since I've been struggling with this for many days I thought I'd give it a shot here. My goal is to somehow render some text on the ...
561 views

### HumanIK Z axis Up in Maya for Unreal Engine

I am pretty stumped! I want to use HumanIK in Maya to throw together some prototype animations for my game that is being developed in Unreal Engine 4.7 The issue is that Unreal requires Z axis to be ...
260 views

### How can I call a native mobile API in Construct 2?

How can I use mobile API features in a Construct 2 game (HTML 5/JavaScrit engine)? I didn't find anything about that on the net, unlike other game frameworks like Corona Enterprise or Cocos2d.
954 views

### Aligning pathfinding to the center of tiles?

I'm looking to achieve tile by tile movement in a project I'm working on. I employed the use of the asset Simply A* Path-finding to allow a unit to navigate the terrain. Since the tiles are simply ...