Questions tagged [graphics-programming]
Programming related to the visual representation of information on computer screens.
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Is Frustum Culling and Occlusion Culling used together, or separately?
I am taking a 3D game programming course and my professor provided the class with already-implemented graphics code with OpenGL. The graphics uses frustum culling to remove primitives outside the view ...
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1answer
33 views
How can I seamlessly animate textures across tiles like in Civilization 6?
I am trying to make a much simpler version of the graphic effects we see in the game Civilization 6. This question applies to the graphics on land and ocean tiles. But I first noticed this effect on ...
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2answers
82 views
How to develop custom Unity graphics?
Processing is a Java library for working with computer graphics, providing methods by which to draw primitive objects, custom meshes, etc., as well as mathematical methods (such as Simple Harmonic ...
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0answers
25 views
OpenGL texture management
I have an OpenGL engine built using bindless textures, which allows me to store all materials in an UBO and drawing thousands of instances with different materials in one pass, by accessing the ...
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1answer
50 views
Polygons depth sorting in Z-buffer
Why is it that the Z-buffer algorithm does not require polygons to be depth sorted to function correctly?
22
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3answers
4k views
How do I know if I'm abstracting graphics APIs too tightly?
When making a renderer that supports multiple graphics APIs, you would typically want to abstract your code in some sort of low level library that is tied with some graphics API like OpenGL, Vulkan, ...
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0answers
29 views
Confused about Vulkan and dx12 queues
in vulkan when I ask for info about my gpu it tells me that I have 16 graphics queues, I also heard that if you use 2 graphics queues it won't make your program faster, just more complicated since one ...
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1answer
173 views
How to create a decent strategy game without becoming an artist?
I love to make games. But I am not an artist. I never learned to make 2d or 3d models. I spent most of my time on programming. I know there are Game engines for non-programmers. But I am looking a way ...
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1answer
156 views
Rendering clouds similar to Sky: Light Awaits?
I'm interested in adding clouds to my game, with a style similar to those in Sky: Light Awaits
You can see them in motion in these videos:
(Starts at 26:00)
https://www.youtube.com/watch?v=...
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1answer
41 views
Directx 12 Root signature compatibility with pso
Can you bind a different root signature than the one that pipeline was created with? If so does it have to have exactly the same parameters or could it have like one more but the pipeline will ignore ...
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0answers
115 views
how to calculate smooth normals for 10,000,000 vertices?
I am trying to calculate smooth normals with angle weight for a huge mesh with 10 million vertices. Currently, i am using map/dictionary to store the traingles connected to a vertex. That is, for each ...
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1answer
129 views
Why do GPUs have limited amount of allocations?
I've been learning Vulkan lately and I read that you can allocate VRAM memory only set amount of times and it doesn't matter if it's 2gb or 2kb, why is it?
I'm specifically referring to ...
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1answer
78 views
Render moveable entities into 3D isometric world?
I have a separate list of moveable entities, and then the regular 3D map, represented by a 2D array of stacks of tiles. My problem is that right now, I'm rendering my moveable entities after the map, ...
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1answer
278 views
Strange realtime shadows in Unity3D
I'm trying to do realtime lighting, and my shadows are acting very strange. When I project a spotlight out from the camera (like a flashlight in a first person game) my shadows show up as 3D skews of ...
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0answers
63 views
D3D12 SV_InstanceID + dynamic indexing not working?
I'm implementing geometry instancing in my engine and I am having trouble indexing the constant buffer that's holding per-instance data using SV_InstanceID. Am I doing something wrong?
Here is the ...
21
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1answer
2k views
Why do transformation matrices always have an extra dimension? [duplicate]
In 3D math I always see matrices with one additional dimension. For example, in 3D graphics, matrices are always 4x4 and in 2d they are 3x3 matrices. Can anyone explain why?
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1answer
120 views
Ordered dithering between “discrete” colors?
I want to achieve color dithering between discrete colors like this:
As you can see, there is no gradient, or technically there is, but very discrete as it's only a 3 color image (right bar).
So I ...
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0answers
170 views
Add emission to shader
I wrote a shader for a targeting system. It creates a parabola of chevron arrows which slowly scroll in the direction of the trajectory. The chevrons also fade to zero alpha at the beginning and end.
...
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1answer
105 views
Does it make sense to do more calculations in the fragment shader if there are more vertices than pixels?
I'm very new to graphics programming, and as I understand it vertex shaders are called per vertex and fragment shaders are per pixel (ignoring anti-aliasing). When it comes to optimization all sources ...
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0answers
20 views
Java Question about setLayout(null);
I'm new to the programming world and would like to learn from experienced teachers. How would I be able to add a picture to a JFrame and at the same time be able to add a panel So I could add buttons ...
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0answers
101 views
How does one create ENB for games like: San Andreas
I know this particular community could be wrong for such a question that includes programmers, modders and such. I believe I should be asking such question on stackoverflow.com or something similar, ...
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1answer
56 views
Does GL Memory model guarantees that late Depth Testing accesses depth buffer values in same draw call
Suppose I issue a draw command that draws 3 overlapping triangles (T1, T2, T3). Fragment shader assigns Depth = 3 to T1 fragments, 2 to T2 and 1 to T3 fragments. Depth Buffer is cleared to 0 before ...
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0answers
224 views
ray-casting, floor-casting part fails
I'm currently working on a ray-casting engine in Java and I can't figure out what's wrong with my code.
For the learning and theory I use:
The permadi tutorial: ( https://permadi.com/1996/05/ray-...
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0answers
115 views
How to implement materials with variable numbers of textures in Assimp?
When importing a mesh, Assimp loads its material, which stores a list of textures of different types; for the sake of this question, let's say I only care about these types:
...
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1answer
45 views
OpenGL: How to render a “shadow” for an object that's behind another?
First off, an image from Fez that depicts the effect I'm after:
I'm trying to achieve a similar effect in my project. I'm quite certain this is done with a stencil buffer, but the resources on such ...
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0answers
20 views
How can I load a file in memory on the Apple IIGS?
I recently got an Apple IIGS and have it booting GS/OS off of a compact flash with 10 32MB ProDOS volumes. It's a great little setup and I've installed ORCA/M, 816 Paint, Merlin 16+ and Complete ...
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1answer
270 views
How can I dynamically switch between graphics APIs?
In games like the new "Doom", you have a console, from which you can use commands to reduce the game's quality or even to switch graphics API, from Opengl to Vulkan and viceversa.
How is this done? I ...
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1answer
60 views
What does declaring a const float within a function do? (CGFX)
I've been working with this piece of code to get the mip map level that I should sample for a texture that I got off a forum somewhere. I noticed that they use a const float. Now from what I ...
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1answer
32 views
How to adjust scaling with rotation?
I'm rendering a texture to a square.
I have to scale the texture because it is 10 times wider than it is tall.
In my fragment shader I divide both the X and Y texture coordinates (I'm using OpenGL), ...
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3answers
468 views
OpenGL: How do I map a square texture onto a rectangular surface?
I'm not asking about how to map the texture itself. I'm just wondering how I could go about evenly mapping a texture to an object so that it repeats itself instead of stretching to the surface.
For ...
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1answer
129 views
Normals on a sphere
I am generating vertices for a sphere by normalizing the vertices of a cube. The coordinates of the vertices are mapped to [-1; 1].
.
I want to get the normal vector of each vertex.
My question is ...
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2answers
162 views
How To Add Animation Graphics To An Android Game
How to make something like this animation drawings that coming out from the car ?
(I'm using android studio)
The Game's Link : Finger Driver
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0answers
33 views
What does a game programmer and graphics programmer do? [duplicate]
I'm quite the novice in terms of my knowledge of game development, and I'd incredibly appreciate any further insight on this. To be a bit more specific, I encountered this video, (https://www.youtube....
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1answer
194 views
One Giant Shader VS Many Small Shaders
I am building forward rendering engine combined with atlas shadow map technique.
My goal is to build an engine that is capable of rendering similar scenes from games such as..
Doom
Overwatch
So I ...
3
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2answers
860 views
Do sprite animations usually run at the same framerate as the game itself?
Just getting into game development and wondering about fps. For example, Binding of Isaac can run at 60 fps, but looking at its sprite sheet, the walk animation is only 12 frames. The game animation ...
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2answers
98 views
How to clip 3D object in projection (octants)?
In example we've wrote some code in Pascal (graph unit) which rotates 3D object in oblique frontal (dimetric) projection in all octants positioned in center of them.
The projection's type:
The code ...
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1answer
154 views
GLfloat vs GLfixed vs GLint performance in 2017
Some people claim that floats should be used for rendering vertices in modern graphics cards, because graphics cards are optimized for floating-point arithmetic and therefore, integer calculations are ...
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2answers
67 views
How to render a model that consists of individually transformable parts?
Consider a 3D model for a spider that consists of a body and eight legs. The legs can be transformed (rotated) relative to the body. I am not sure what the common ways of rendering such a scene are, ...
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1answer
79 views
Zooming in so a smaller portion of the game scene fills the entire screen
so i am creating a game similar to super-smash-bros, in which the camera should zoom in on players when they are close together, and scale back when they are apart. I create a window for my game via
<...
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1answer
273 views
Change transparency of image at runtime, LOVE2D
I would like to know how to take a defined image (e.g. a tile) in the LOVE game engine and draw it with a transparency that may vary per-frame. Stencils seem to only work for completely hiding parts ...
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4answers
719 views
Why are 3d projections on a 2d screen not like what the human eye sees?
Firstly, I'm sorry if this question doesn't make much sense or is poorly written - I have almost no experience with programming, and none at all with game development. I'm also not sure it's an ...
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1answer
21 views
OpenGL only utilizing the last initialized sprite's positional data
I'm currently creating a 2d fighting game utilizing OpenGL and I have run into a problem where OpenGL is only drawing at my last initialized sprite position, regardless of how many sprites I ...
5
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3answers
911 views
Ray tracing and Z buffering in graphics
I am a high school student taking computer science as a subject, and someone who is very interested in the game development industry. I am currently writing an essay on Raytracing and Z-buffering by ...
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1answer
163 views
How shader program still works even after detaching shader object?
In the following process of shader creation, shader object is detached after linking program (glLinkProgram), how does the shader program still works after detaching and deleting shader objects?
...
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0answers
49 views
given 4 points on a textured sphere extract a 2d plane and it's projected texture
Setting the scene I'm working on a feature in scenekit where i have a camera at the center of a sphere. The sphere has a texture wrapped around it. Let's say it was a 360 degree image captured inside ...
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1answer
526 views
What is the “correct” way to render to a cubemap using Vulkan?
After searching far and wide for the solution to this, the only one I have been able to find that verifiably works is to the render a face to a framebuffer and then use a memcpy to copy that ...
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7answers
26k views
Why do game studios need graphics programmers if they're using game engines?
In the credits section of the games I play, there are names of graphics programmers. If they used a game engine, why do they need a graphics programmer? Isn't the game engine doing their job?
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0answers
105 views
How do I deform a texture?
I'm using LibGDX, and I don't know where to start; I would like to deform a texture.
Let's say I have a PolygonSprite, and I have vertices and a texture.
Image 1 represents what I have. I would like ...
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1answer
535 views
Playstation 4 OpenGL ES support (or Xbox)
I know that the Playstation 3 supported at least OpenGL ES 1.0, and the Vita OpenGL ES 2.0. But what about the Playstation 4 (and/or the new PS4 Pro)? Does anyone know for certain if it has native ...
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1answer
145 views
Why is my transform stretching?
I've read a lot about transformations: model to world space, world to camera space and projection transformationsl but when programming it, I can't get things right. I think I'm missing something, so ...
