3d-game-shaders-for-beginners | step guide to implementing SSAO | Graphics library

 by   lettier C++ Version: Current License: No License

kandi X-RAY | 3d-game-shaders-for-beginners Summary

kandi X-RAY | 3d-game-shaders-for-beginners Summary

3d-game-shaders-for-beginners is a C++ library typically used in User Interface, Graphics, Unity, WebGL applications. 3d-game-shaders-for-beginners has no bugs, it has no vulnerabilities and it has medium support. You can download it from GitHub.

Interested in adding textures, lighting, shadows, normal maps, glowing objects, ambient occlusion, reflections, refractions, and more to your 3D game? Great! Below is a collection of shading techniques that will take your game visuals to new heights. I've explained each technique in such a way that you can take what you learn here and apply/port it to whatever stack you use—be it Godot, Unity, Unreal, or something else. For the glue in between the shaders, I've chosen the fabulous Panda3D game engine and the OpenGL Shading Language (GLSL). So if that is your stack, then you'll also get the benefit of learning how to use these shading techniques with Panda3D and OpenGL specifically.

            kandi-support Support

              3d-game-shaders-for-beginners has a medium active ecosystem.
              It has 15589 star(s) with 1243 fork(s). There are 401 watchers for this library.
              It had no major release in the last 6 months.
              There are 17 open issues and 11 have been closed. On average issues are closed in 85 days. There are 1 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of 3d-game-shaders-for-beginners is current.

            kandi-Quality Quality

              3d-game-shaders-for-beginners has 0 bugs and 0 code smells.

            kandi-Security Security

              3d-game-shaders-for-beginners has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              3d-game-shaders-for-beginners code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              3d-game-shaders-for-beginners does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              Without a license, all rights are reserved, and you cannot use the library in your applications.

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              3d-game-shaders-for-beginners releases are not available. You will need to build from source code and install.

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            3d-game-shaders-for-beginners Examples and Code Snippets

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            Community Discussions


            Advice on improving a function's performace
            Asked 2022-Apr-11 at 00:08

            For a project I'm working on, I require a function which copies the contents of a rectangular image into another via its pixel buffers. The function needs to account for edge collisions on the destination image as the two images are rarely going to be the same size.

            I'm looking for tips on the most optimal way to do this, as the function I'm using can copy a 720x480 image into a 1920x955 image in just under 1.5ms. That's fine on its own, but hardly optimal.



            Answered 2022-Apr-10 at 19:29

            You can determine once for all which rectangle of the source image will effectively be copied to the destination. Then the most efficient way is to copy row by row, as the rows are contiguous. And memcpy is the fastest way.

            Source https://stackoverflow.com/questions/71816358


            SSBO CPU mapping returning correct data, but data is 'different' to the SSBO on GPU
            Asked 2022-Feb-10 at 13:25

            I've run into an issue while attempting to use SSBOs as follows:



            Answered 2022-Feb-10 at 13:25

            GLSL structs and C++ structs have different rules on alignment. For structs, the spec states:

            If the member is a structure, the base alignment of the structure is N, where N is the largest base alignment value of any of its members, and rounded up to the base alignment of a vec4. The individual members of this substructure are then assigned offsets by applying this set of rules recursively, where the base offset of the first member of the sub-structure is equal to the aligned offset of the structure. The structure may have padding at the end; the base offset of the member following the sub-structure is rounded up to the next multiple of the base alignment of the structure.

            Let's analyze the struct:

            Source https://stackoverflow.com/questions/71065244


            What is the best lossless way to scale up a barcode image in c#
            Asked 2022-Feb-09 at 21:20

            I've come across this problem many times over the years and still live in hope that there is an easy way to do this that I have missed. I work with barcodes a lot. They are usually made of black dots or lines on a white background. Barcode readers generally work faster and more accurately when the edges are crisp and then size of the lines or dots are precise.

            Most barcode generation algorithms will give you a compact barcode usually with the smallest element size being one pixel. A typical QR code could fit in a 21 x 21 grid. This would be too small to see if printed pixel to pixel on most printers and would typically be scaled up. The result of scaling it up depends on the method used and although sometimes you are given a choice, often you have no options that make the image suitable. Even printing directly will often give you expected gray artefacts or forms of dithering. The most consistent way I have found is to scale the images before they are use daily in other places such as Microsoft Word, lightburn and a few others I use that still give me a headache.

            Below I will go through what I have tried and show the results. I am limiting this to bitmaps only because using vectors here is not something I need on my current project.

            My current best resolution is not pretty, it is slow and although I could improve the speed by locking the bits in the bitmap, I am hoping someone has a really simple answer that I had totally missed on my search again this time.

            Here is an image of a simple QR code blown up in GIMP.

            The problem is, if it is scaled up, it'll often end up looking like this:

            Below I created a small test program to go through all the different modes I know of and then generate a matrix of images which I have reproduced below. The version I currently use is Mode 99 which involves inspecting each pixel and drawing a square.

            Does anyone have any better ideas?



            Answered 2022-Feb-09 at 19:27

            You can use a library like ImageTracer.NET to convert the image to a vector image, then it'll scale as big as you need:


            Source https://stackoverflow.com/questions/71055395


            Motion Vector - how to calculate it properly?
            Asked 2022-Jan-20 at 21:07

            I'm trying to wrap my head around calculating motion vectors (also called velocity buffer). I found this tutorial, but I'm not satisfied with explanations of how motion vector are calculated. Here is the code:



            Answered 2022-Jan-20 at 21:07

            This is a mapping from the [-1, 1] clip space onto the [0, 1] texture space. Since lookups in the blur shader have to read from a textured at a position offset by the velocity vector, it's necessary to perform this conversion.

            Note, that the + 0.5 part is actually unnecessary, since it cancels out in a-b anyway. So the same result would have been achieved by using something like

            Source https://stackoverflow.com/questions/70792949


            Using the CGA/EGA/VGA planar graphics modes
            Asked 2022-Jan-17 at 01:56

            I have trouble to grasp how to use colors in CGA/EGA/VGA video graphics modes. The video modes I'm particularly interested in are 0Dh (EGA 320x200) and 12h (VGA 640x480). Both of these modes have 4 planes, thus 16 colors.

            My (probably incorrect) understanding is that I should activate a set of planes by writing a bitmask to port 03C4h, then when I write to video memory, the data only gets written to the activated planes. Mostly I used this document to get my information, though I also encountered several other tutorials and discussions: http://www.techhelpmanual.com/89-video_memory_layouts.html

            Now I'm trying to write pixels in all possible colors in the first word in the video memory (top left part of screen). I load 1 for the initial bitmask to AH and 1 bit to BX. Then in a loop, I increment AH and shift (SHL) the bit in BX to hit a different pixel next time. I OR BX to A000h:0000h to add each pixels by leaving the already existing pixels untouched.

            What I'm expected to see is a line of pixels in all possible 16 EGA colors on the top left of the screen. What I actually see is 7 white and 1 bright yellow dots with black pixels in between them. What am I doing wrong?

            Also, every tutorial says that I must write 0005h to port 03CEh before I start to use planes. What is the purpose of that? When I comment those lines out, I can still use planes (I mean, in other programs). Previously I had success using planes when I was writing to different words in video memory (so I didn't need different color pixels in one block of 16 pixels that's represented by a single word in video memory); and when I used BIOS functions (e.g. INT 10h/AH=0Ch) to write pixels, but still I want to understand how to use planar graphics without BIOS, as I believe the BIOS functions are slow.

            Here is my code (indentation is optimized for 8-width tabs, so it kind of looks off here):



            Answered 2022-Jan-17 at 01:56

            Writing the word 0005h to ports 03CEh and 03CFh will select write mode 0. This is a complex mode that involves many features of the VGA but luckily for us most of these are reset when the video mode is set.
            However your code still needs to do the following:

            • In order to fill the VGA's internal 32-bit latch, you must perform a read-before-write operation
            • Restricting output to a single or a few pixels is done using the BitMask register.

            Next snippet displays a rainbow of 16 vertical lines that are 1 pixel wide:

            Source https://stackoverflow.com/questions/70729643


            VBE: why does my code not provide a linear frame buffer?
            Asked 2022-Jan-15 at 21:24

            I am a beginner who is trying to implement simple graphics in VBE. I have written the following assembly code to boot, enter 32-bit protected mode, and enter VBE mode 0x4117. (I was told that the output of [mode] OR 0x4000 would produce a version of the mode with a linear frame buffer, so I assumed that 0x0117 OR 0x4000 = 0x4117 should have a linear frame buffer.



            Answered 2022-Jan-15 at 21:24

            Have I correctly loaded a linear frame buffer, and, if not, how could I do so?

            In your code you just assume that the linear frame buffer mode is available. You should inspect the ModeInfoBlock.ModeAttributes bit 7 to know for sure. The bit needs to be ON:

            Source https://stackoverflow.com/questions/70704920


            Add border to rasterImage
            Asked 2022-Jan-02 at 14:46

            Here is a gradient color legend I created using rasterImage:



            Answered 2022-Jan-02 at 11:54

            Using rect(), the following adds a black border.

            Source https://stackoverflow.com/questions/70555635


            Plot two 3D graphics from own models in one plot in R
            Asked 2021-Dec-15 at 10:57

            I have a model like this



            Answered 2021-Dec-15 at 10:57

            All commands from the plot3D package include a command add = T. With that it is very easy to plot the second surface, by just adding add = T to the second plot command.

            Source https://stackoverflow.com/questions/70242727


            Draw a String with a specific angle degree in line
            Asked 2021-Dec-03 at 21:58

            I'm drawing a graph with two points of each point having a line with a weight.

            for example graph: point "15" to point "16" line with the weight of 1.872 and point "16" to point "15" with the weight of 1.567.

            take a look at my graph for now:

            I want to draw a String with always parallel (adjacent) to the line.

            I calculated the slope for the straight and the angel I did calculate is the arctan of this slope:

            I had use this function to rotate the string:



            Answered 2021-Dec-03 at 21:58

            Here is a quick demo to be used as a guide on how it might be done. I omitted some things like the arrowheads since that is just busy work. And I guesstimated on the label positions. I would recommend you read about the three argument version of Graphics.rotate() and RenderingHints and anti-aliasing to smooth the lines.

            You may want to write general methods to facilitate positioning the text and labels based on font size.

            But I believe your primary problem was doing int division when calculating the slope.

            Source https://stackoverflow.com/questions/70219594


            SkiaSharp draw to window
            Asked 2021-Nov-27 at 09:50

            How can I open a window and draw to it with SkiaSharp (without using winforms, wpf or anything like that)? I've tried using SFML.Net instead of SKIA but it lacks a lot of features (rounded rectangle, shadow, gradient).



            Answered 2021-Nov-27 at 09:50

            I have solved the problem by using Silk.NET SFML bindings to create a GL context for Skia.

            This pull request was very helpful.

            Source https://stackoverflow.com/questions/70085658

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


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