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Questions tagged [rasterization]

The tag has no usage guidance.

1
vote
1answer
146 views

Why does my triangle rasterization miss some pixels along one edge?

I am having an issue rasterizing a triangle. The goal is to calculate barycentric coordinates and make the triangle based off those coordinates. I am having an issue with having weird jaggy missing ...
7
votes
3answers
968 views

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 ...
8
votes
1answer
363 views

Parallelism in GPU's rasterization process

Based on this article I understood the base principle inside the Rasterization algorithm: ...
1
vote
1answer
140 views

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?
0
votes
0answers
171 views

Exactly what does the rasterizer stage of the directx pipeline do.

For sake of simplicity I assume my primitive topology to be a triangle list or basically a list of vertices (points) for which 3 of them constitute a triangle. So for n triangles you would have 3n ...
10
votes
2answers
575 views

Details of what GPU actually do when clipping in 4D homogeneous space?

I am learning programmable rendering pipeline by implementing a tiny software renderer. I try to implement it in a 'hardware' style. However, I am not familiar with the GPU pipeline and got some ...
1
vote
1answer
590 views

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, ...
2
votes
1answer
164 views

Software polygon rasterization with transparency using raw image data

I have an image with shapes in it (squares and triangles with different colors scattered in the image) and I have an algorithm that matches the image and extracts the geometry vertices from image raw ...
0
votes
1answer
716 views

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 ...
4
votes
2answers
289 views

Retro Racing Renderer

While I have a lot of experience with coding SW&HW 3D rasterizers across multiple platforms and eras, I never got to coding a 2D renderer for a non-polygonal racing game with multiple rolling ...
0
votes
1answer
322 views

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 ...
4
votes
2answers
135 views

XNA/C# Convert polygons into tilemap

I'm currently working on my 2D survival game, where the world is infinite and generated by perlin noise. I wanted to also include biomes and this article interested me - http://www-cs-students....
1
vote
2answers
163 views

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 (...
1
vote
1answer
569 views

(XNA) Stretching Images (Sprites) without Blur (Rasterizing?)

thanks for clicking on this question although it has likely one of the most un-specific and confusing titles on this site. I am somewhat new to XNA and I have only posted 1 question on this site ...
0
votes
1answer
1k views

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 ...
17
votes
3answers
31k views

How do you draw a straight line between two points in a bitmap?

I'm playing around with height maps (bitmaps), trying to create some of my own in my game, and for that I need to implement some basic drawing methods. I've quickly realized that drawing straight ...
0
votes
1answer
182 views

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 ...
1
vote
1answer
601 views

DirectX11 pixel shader in pipeline is missing

I'm writing a program which displays a MS3D model using DirectX, and unfortunately, the result shows nothing on the screen. When I use the Graphics Debugger from Visual Studio 13, I notice that the ...
0
votes
1answer
149 views

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 ...
3
votes
1answer
853 views

How does the Direct3D 9 rasterizer determine triangle coverage?

I'm working on a software rasterizer to use in my project. I have implemented one that works well, however, often my rasterizer under or overestimates triangle coverage. I need perfect emulation of ...
1
vote
1answer
1k views

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. ...
5
votes
1answer
403 views

Is there any heuristic to polygonize a closed 2D raster shape with n triangles?

Let's say we have a 2D image black on white that shows a closed geometric shape. Is there any (not naive brute force) algorithm that approximates that shape as closely as possible with n triangles? ...
3
votes
2answers
1k views

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 ...