Questions tagged [rasterization]
The rasterization tag has no summary.
39 questions
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Phong shading: missing specular lighting, skipped face
I'm implementing my first rasterizer, and I've run into a 2 issues with Phong shading that I have no idea how to debug. First, specular lighting seems to be completely missing. Second, there is an ...
- 41
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71
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How do I get this texture mapping for my quad (no triangles) to be perspective correct?
I'm working on a 3D Software Rasterizer and I'm wanting to render textures on walls now. I've tried to do it myself, but failed since it just distorts. I read up on the wikipedia page for Texture ...
- 31
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How do I implement floors and ceilings properly to my DOOM Style Renderer?
I'm working on a tiny DOOM Style Renderer and I've managed to piece together something that can render walls. I pieced it together by looking at videos from 3DSage and The Old School Coder; I got a ...
- 31
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Is there a reason that we have to use homogeneous coordinates in rasterization?
Looking at the pipeline of games, I am confused about the necessity of homogeneous coordinates.
For gameplay logic, a 4x3 matrix is enough to handle translation, rotation, and scale. I can't think of ...
- 11
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744
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Raster Graphics vs Vector graphics
There was this game that I used to play when I was a kid. It's named Another World. It was ahead of its time in graphics, it even has real-time cutscenes on the SNES version. That game does not use ...
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744
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Geometric clipping of triangles intersecting near plane
I was reading about how rasterization works but there is one topic I can't quite understand.
After perspective projection, our point is in clip space as I understand it.
Now we test all points in a ...
- 45
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Opengl in 500 lines point in triangle question
https://github.com/ssloy/tinyrenderer/wiki/Lesson-2-Triangle-rasterization-and-back-face-culling
I am on lesson 2 of the "Opengl in 500 lines" tutorial. I ...
- 135
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How can I draw filled triangles in C++?
VERY IMPORTANT NOTE: Im trying to fill a triangle. I have already made the 3D part. Sorry if this wasn't understandable.
I'm currently trying to create a simple 3D-Engine. Well, I have successfully ...
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3
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4k
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How to draw a smoother solid-fill circle?
I'm experimenting with drawing circles and have brute-forced a very simple one:
Pseduocode:
...
- 155
6
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3
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Why is the depth test not done on geometry before rasterization?
It seems the only time depth is used to discard data is during rasterization, i.e. at the fragment level.
In the geometry stage, I've only see culling and clipping of vertices. Is it not possible to ...
- 161
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How can I obtain a triangle ID during rasterization?
I want to know the triangle ID of each rendered pixel is coming from. Is there a way to do this in OpenGL?
- 173
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Drawing a lines radiating from every angle using Bresenham line algorithm
I am trying to recreate a image like this
... or just each point
Using Bresenham line algorithm, but can't seem to able to do so.. The point i receive from my computation doesn't look like a like, ...
- 21
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How can I rasterize 3D triangles in software?
I am creating a 3D software renderer, and I have a wire frame cube rendering. Now I am working on solid color rendering and I am wondering what an efficient algorithm for shading the contents of the ...
- 113
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547
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Algorithm to fill a shape defined by 4 pixel points?
I'm developing an application in Unity3D where a user can define 4 pixel points on screen, and what I would like to do is fill this shape with pixels using Unity's SetPixel.
While I can do this ...
- 362
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2
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246
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Is the rendering of distorted point clouds more complex?
I have two point clouds of n points:
A dense ball-shape point cloud with many points inside
A spherical point cloud with points on its surface.
Is there (really) any difference between rendering (...
- 31
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2k
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What coordinates are we passing to pixel shader from vertex shader?
I have read articles about shader programing and understood the very basic knowledge of shader programing. One thing I always get confused is about the texture mapping. What I pass(output) from VS to ...
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255
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Triangular grid and rendering to a texture (Direct3D 11)
Is it possible to render vertex data from a triangular grid into a texture with a same size (i.e. 3x3 vertices to 3x3 pixels - each pixel is representing one vertex)?
Consider following situation. I ...
- 255
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1
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289
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Keep rasterized pixel amount constant
I have a scene that is rendered from the point of view of the light using an orthographic projection matrix.
For an arbitrarily shaped and oriented object that doesn't change its shape or size in ...
- 4,442
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2k
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Fast software color interpolating triangle rasterization technique
I'm implementing a software renderer with this rasterization method, however, I was wondering if there is a possibility to improve it, or if there exists an alternative technique that is much faster. ...
- 176
3
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2
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2k
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Scan-Line Z-Buffering Dilemma
I have a set of vertices in 3D space, and for each I retain the following information:
Its 3D coordinates (x, y, z).
A list of pointers to some of the other vertices with which it's connected by edges....
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