Recent questions tagged graphics

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graphics - What does glLoadIdentity() do in OpenGL?

I'm new to OpenGL and I'm a little overwhelmed with all of the random functions that I have in ... GL_PROJECTION) VS glMatrixMode(GL_MODELVIEW). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - Bump-map a sphere with a texture map

We would like to bump-map a sphere with a texture map. However, the surface of the sphere has an area that is ... can be used for bump mapping. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - Algorithm for drawing a 4-connected line

I'm looking for an algorithm (coded in Java would be nice, but anything clear enough to translate to Java is ... any help anyone can provide. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - Three.js: What Is The Exact Difference Between Lambert and Phong?

I understand the difference between Lambert and Phong in general computer graphics. I also understand how we can ... and precise. Thanks, Shane See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - How do you check for intersection between a line segment and a line ray emanating from a point at an angle from horizontal?

Given a line segment, that is two points (x1,y1) and (x2,y2), one point P(x,y) and an angle theta. ... , how to find the point of intersection? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - How to speed up python's 'turtle' function and stop it freezing at the end

I have written a turtle program in python, but there are two problems. It goes way too slow for larger numbers, I was ... : I am on version 3.2! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - How to mix two ARGB pixels?

How can I mix two ARGB pixels ? Example Here A is (Red with Alpha) and B is ( Blue with Alpha ). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - How to offset a cubic bezier curve?

I'm trying to create a "parrallel" bezier curve. In my attempts I've gotten close but no cigar. I'm trying ... /2010/11/12/offset-bezier-curves/ See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - Best algorithm for matching colours.

I have an array of around 200 colours in RGB format. I want to write a program that takes any RGB colour ... ? Is there an easier alternative? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - Polygon Triangulation with Holes

I am looking for an algorithm or library (better) to break down a polygon into triangles. I will be using these ... Edit: This is a 2D polygon. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - Rotating multiple images causing flickering. Java Graphics2D

I am creating a top down shooter that has zombies follow you and rotate to aim directly at you. If there ... methods to neaten things up) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - Drawing 3D sphere in C/C++

I am looking for an algorithm which can draw a nice looking 3D sphere on small resolution. I found Bresenham' ... . Thank you in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - extracting a quadrilateral image to a rectangle

BOUNTY UPDATE Following Denis's link, this is how to use the threeblindmiceandamonkey code: // the destination ... standard approach for this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - How to recognize rectangles in this image?

I have a image with horizontal and vertical lines. In fact, this image is the BBC website converted to horizontal ... form a rectangle. Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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600 views

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graphics - Saving images in Python at a very high quality

How can I save Python plots at very high quality? That is, when I keep zooming in on the object saved ... that mess with Latexmk compilation. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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379 views

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graphics - Transformation of 3D objects related to vanishing points and horizon line

I'm trying to computing the exact prospective transformation of a 3D object starting from a vanishing points and ... com/watch?v=EsSerR-AjEk See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - R package lattice won't plot if run using source()

I started using the lattice graphic package but I stumbled into a problem. I hope somebody can help me out. I ... 07-08) with lattice_0.19-30 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - Set BufferedImage alpha mask in Java

I have two BufferedImages I loaded in from pngs. The first contains an image, the second an alpha mask for ... with the right alpha channel. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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472 views

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graphics - How to mask a square image into an image with round corners in iOS?

How can you mask a square image into an image with round corners? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - Adjust brightness and contrast of BufferedImage in Java

I'm processing a bunch of images with some framework, and all I'm given is a bunch of BufferedImage objects. ... // ... Any ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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574 views

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graphics - Getting the pixel color value of a point on an Android View that includes a Bitmap-backed Canvas

I'm trying to figure out the best way to get the pixel color value at a given point on a View. There ... into account all of those sources? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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511 views

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graphics - How to test if a line segment intersects an axis-aligned rectange in 2D?

How to test if a line segment intersects an axis-aligned rectange in 2D? The segment is defined with its two ... -left and bottom-right points. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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473 views

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graphics - Blackberry - how to resize image?

I wanted to know if we can resize an image. Suppose if we want to draw an image of 200x200 actual size ... size on our blackberry screen. Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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