commit e49e0b9951abf33ec0bb1dbdb1e0ae2bf8ba048d parent 26e905fb5cccd25c41be2df1e378f05109c656ca Author: Christian Ermann <christianermann@gmail.com> Date: Sun, 5 Sep 2021 20:26:07 -0700 Switched from single page site to Hugo blog Diffstat:
| A | .gitmodules | | | 3 | +++ |
| A | archetypes/default.md | | | 6 | ++++++ |
| A | config.toml | | | 52 | ++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | content/_index.md | | | 5 | +++++ |
| A | content/posts/unbind.md | | | 76 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| D | index.html | | | 98 | ------------------------------------------------------------------------------- |
| A | public/categories/index.html | | | 42 | ++++++++++++++++++++++++++++++++++++++++++ |
| A | public/categories/index.xml | | | 10 | ++++++++++ |
| A | public/categories/page/1/index.html | | | 2 | ++ |
| A | public/css/styles.css | | | 96 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | public/index.html | | | 56 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | public/index.xml | | | 20 | ++++++++++++++++++++ |
| A | public/posts/index.html | | | 47 | +++++++++++++++++++++++++++++++++++++++++++++++ |
| A | public/posts/index.xml | | | 20 | ++++++++++++++++++++ |
| A | public/posts/page/1/index.html | | | 2 | ++ |
| A | public/posts/unbind/index.html | | | 88 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| R | resume.pdf -> public/resume.pdf | | | 0 | |
| A | public/sitemap.xml | | | 25 | +++++++++++++++++++++++++ |
| A | public/tags/c/index.html | | | 47 | +++++++++++++++++++++++++++++++++++++++++++++++ |
| A | public/tags/c/index.xml | | | 20 | ++++++++++++++++++++ |
| A | public/tags/c/page/1/index.html | | | 2 | ++ |
| A | public/tags/index.html | | | 46 | ++++++++++++++++++++++++++++++++++++++++++++++ |
| A | public/tags/index.xml | | | 29 | +++++++++++++++++++++++++++++ |
| A | public/tags/opengl/index.html | | | 47 | +++++++++++++++++++++++++++++++++++++++++++++++ |
| A | public/tags/opengl/index.xml | | | 20 | ++++++++++++++++++++ |
| A | public/tags/opengl/page/1/index.html | | | 2 | ++ |
| A | public/tags/page/1/index.html | | | 2 | ++ |
| R | resume.pdf -> static/resume.pdf | | | 0 | |
| D | styles.css | | | 107 | ------------------------------------------------------------------------------- |
| A | themes/simple | | | 1 | + |
30 files changed, 766 insertions(+), 205 deletions(-)
diff --git a/.gitmodules b/.gitmodules @@ -0,0 +1,3 @@ +[submodule "themes/simple"] + path = themes/simple + url = https://github.com/c2000e/simple_hugo.git diff --git a/archetypes/default.md b/archetypes/default.md @@ -0,0 +1,6 @@ +--- +title: "{{ replace .Name "-" " " | title }}" +date: {{ .Date }} +draft: true +--- + diff --git a/config.toml b/config.toml @@ -0,0 +1,52 @@ +baseURL = "https://www.christianermann.dev" +languageCode = "en-us" +title = "Christian Ermann" + +theme = "simple" + +pagination = 20 +summaryLength = 25 + +[markup] + [markup.highlight] + style = 'monokailight' + tabWidth = 4 + +[params] + author = "Christian Ermann" + +[menu] + [[menu.main]] + identifier = "main" + name = "Main" + url = "/" + weight = 1 + + [[menu.main]] + identifier = "posts" + name = "Posts" + url = "/posts/" + weight = 2 + + [[menu.main]] + identifier = "tags" + name = "Tags" + url = "/tags/" + weight = 3 + + [[menu.main]] + identifier = "resume" + name = "Resume" + url = "/resume.pdf" + weight = 4 + + [[menu.footer]] + name = "Github" + url = "https://github.com/c2000e" + weight = 1 + + [[menu.footer]] + name = "LinkedIn" + url = "https://www.linkedin.com/in/christian-ermann/" + weight = 2 + diff --git a/content/_index.md b/content/_index.md @@ -0,0 +1,5 @@ +--- +title: "christianermann.dev" +date: "2021-25-08" +draft: "false" +--- diff --git a/content/posts/unbind.md b/content/posts/unbind.md @@ -0,0 +1,76 @@ +--- +title: "Unbind Your Vertex Array Objects." +date: 2021-08-25T14:33:02-05:00 +draft: false +tags: ["OpenGL", "C"] +--- + +When I first started learning about OpenGL, I always made sure to unbind each resource as soon as I was done using it. Over time I became more lenient with unbinding, as in many cases leaving resources bound is okay and leads to fewer API calls. + +In addition, when I'm developing on my PC I have access to the newer Direct State Access (DSA) functions, so binding resources isn't something I have to worry about as much. However, I do a fair amount of programming on my macbook which means I don't always have access to the DSA functions. + +I was working on a project recently that involved the vertex and index data for a mesh frequently changing. The actual mesh struct has a bit more going on, but we can think of it like this for now: + +{{<highlight c>}} +typedef struct { + Vec3 *vertices; + GLuint *indices; + GLuint vao; + GLuint vbo; + GLuint ebo; +} Mesh; +{{</highlight>}} + +So when it comes time to update the vertex or index data, we map the vertex buffer object to the vertices pointer and the element buffer object to the indices pointer. Then we can write all of our vertex and index data directly to the buffers, and then unmap them when we're all done and need to draw. + + +{{<highlight c>}} +... + +glBindBuffer(GL_ARRAY_BUFFER, mesh->vbo); +mesh->vertices = glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY); + +glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh->ebo); +mesh->indices = glMapBuffer(GL_ELEMENT_ARRAY_BUFFER, GL_WRITE_ONLY); + +// While we have the buffers mapped, we can write data directly to +// mesh->vertices and mesh->indices. + +glBindBuffer(GL_ARRAY_BUFFER, mesh->vbo); +glUnmapBuffer(GL_ARRAY_BUFFER); +mesh->vertices = NULL + +glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh->ebo); +glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER); +mesh->indices = NULL + +// Now that the buffers are unmapped, we can draw the mesh again. + +... +{{</highlight>}} + +Leaving the buffers bound in the above snippet didn't cause problems and seemed a reasonable thing to do to reduce unnecessary OpenGL calls. +The issues I was running into were actually caused by how I was drawing each mesh: + +{{<highlight c "">}} +... + +glBindVertexArray(mesh->vao); +glDrawElements(...); + +... +{{</highlight>}} + +Since I wasn't unbinding the mesh's vertex array object when I finished drawing it, when I updated another mesh's vertex or index data and bound that mesh's buffer objects, the vertex array object I forgot to unbind would now be using the incorrect buffers to draw with. + +Luckily, there was a simple fix, and now I know to be more careful with unbinding vertex array objects: + +{{<highlight c>}} +... + +glBindVertexArray(mesh->vao); +glDrawElements(...); +glBindVertexArray(0); + +... +{{</highlight>}} diff --git a/index.html b/index.html @@ -1,98 +0,0 @@ -<!doctype html> -<html> - <head> - <meta charset="utf-8"/> - <meta http-equiv="x-ua-compatible" content="ie=edge"/> - <meta name="viewport" content="width=device-width, initial-scale=1"/> - <meta name="author" content="Christian Ermann"/> - <title>Christian Ermann</title> - <link rel="stylesheet" href="styles.css"/> - <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Open+Sans"/> - </head> - - <body> - <div id="header"> - <h2>Hi, I'm Christian!</h2> - <nav> - <h3> - <a href="https://github.com/c2000e?tab=repositories"> - Projects - </a> - <a href="resume.pdf"> - Resume - </a> - </h3> - </nav> - </div> - <hr> - <div id="introduction"> - <p>I'm currently studying math, physics, and computer science at - <a href="https://www.lclark.edu/">Lewis & Clark College</a> in - Portland, Oregon. I also compete on the men's varsity crew team, - work in the physics department, and tutor at the <a href="https://college.lclark.edu/departments/mathematical_sciences/sqrc/"> - SQRC</a>.</p> - </div> - <div id="projects"> - <h2>Recent Projects:</h2> - <hr> - <ul> - <li class="project"> - <h4> - <a href="https://github.com/c2000e/quantum_leapfrog"> - Quantum Leapfrog - </a> - </h4> - <p>A leapfrog integrator for the time-dependent - Schroedinger equation. Written in Python.</p> - </li> - <li class="project"> - <h4> - <a href="https://github.com/c2000e/marching_cubes"> - Marching Cubes - </a> - </h4> - <p>Render signed distance functions with the marching cubes - algorithm. Utilizes OpenGL and C++.</p> - </li> - <li class="project"> - <h4> - <a href="https://github.com/c2000e/skej"> - Skej - </a> - </h4> - <p>A REST-API for tracking deadlines built with python.</p> - </li> - </ul> - </div> - <div id="achievements"> - <h2>Education and Achievements:</h2> - <hr> - <ul> - <li> - <p>B.A. in Physics & B.A. in Mathematics, Expected May - 2022<p> - <p>Lewis & Clark College, Portland, - Oregon<p> - </li> - <li> - <p> - <a href="https://fhsu.edu/kams/">KAMS</a> - Completion Certificate, 2018 - </p> - <p>Fort Hays State University, Hays, Kansas</p> - </li> - <li> - <p>Eagle Scout Award, 2016</p> - <p>Troop 73, Liberal, Kansas</p> - </li> - </ul> - </div> - <div id="footer"> - <h2>Contact me:</h2> - <hr> - <a href="mailto:christianermann@gmail.com"> - christianermann@gmail.com - </a> - </div> - </body> -</html> diff --git a/public/categories/index.html b/public/categories/index.html @@ -0,0 +1,42 @@ +<!DOCTYPE html> +<html lang="en-us"><head> + <meta charset="UTF-8"> + <meta name="viewport" content="width=device-width"> + <title>Categories</title> + <link rel="stylesheet" href="/css/styles.css"> +</head> +<body><header> + <div id="title"> + <a href="https://www.christianermann.dev">Christian Ermann</a> + </div> + <nav> + + <a href="/">Main</a>. + + <a href="/posts/">Posts</a>. + + <a href="/tags/">Tags</a>. + + <a href="/resume.pdf">Resume</a>. + + </nav> +</header> + + <h1>Categories</h1> + <ul> + + </ul> + <div> + +</div> + +<footer> + + <a href="https://github.com/c2000e">Github</a>. + + <a href="https://www.linkedin.com/in/christian-ermann/">LinkedIn</a>. + + <p>Copyright © 2021 Christian Ermann.</p> +</footer> +</body> +</html> diff --git a/public/categories/index.xml b/public/categories/index.xml @@ -0,0 +1,10 @@ +<?xml version="1.0" encoding="utf-8" standalone="yes"?> +<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"> + <channel> + <title>Categories on Christian Ermann</title> + <link>https://www.christianermann.dev/categories/</link> + <description>Recent content in Categories on Christian Ermann</description> + <generator>Hugo -- gohugo.io</generator> + <language>en-us</language><atom:link href="https://www.christianermann.dev/categories/index.xml" rel="self" type="application/rss+xml" /> + </channel> +</rss> diff --git a/public/categories/page/1/index.html b/public/categories/page/1/index.html @@ -0,0 +1 @@ +<!DOCTYPE html><html><head><title>https://www.christianermann.dev/categories/</title><link rel="canonical" href="https://www.christianermann.dev/categories/"/><meta name="robots" content="noindex"><meta charset="utf-8" /><meta http-equiv="refresh" content="0; url=https://www.christianermann.dev/categories/" /></head></html> +\ No newline at end of file diff --git a/public/css/styles.css b/public/css/styles.css @@ -0,0 +1,96 @@ +* { + margin: 0; + padding: 0; +} + +html { + overflow-y: scroll; + background-color: #fffefc; + color: #444; +} + +time { + font-weight: bold; +} + +body { + max-width: 600px; + margin: 40px auto; + padding: 0 10px; + font: 14px/1.5 monospace; +} + +a:link, a:visited, a:active, a:hover { + color: #24a5d4; +} + +a:link, a:visited, a:active { + text-decoration: none; +} + +a:hover { + text-decoration: underline; +} + +h1, h2, h3 { + line-height: 1.2; +} + +header { + margin-bottom: 20px; +} + +#title { + margin-bottom: 5px; +} + +.summary { + margin-top: 20px; + margin-bottom: 20px; +} + +.summary_metadata { + margin-top: 5px; + margin-bottom: 5px; +} + +.summary_body { + margin-top: 5px; + margin-bottom: 5px; +} + +footer { + margin-top: 20px; +} + +ul { + margin-top: 20px; + margin-left: 20px; + margin-bottom: 20px; +} + +article { + margin-top: 20px; + margin-bottom: 20px; +} + +article p { + margin-top: 15px; + margin-bottom: 15px; +} + +.highlight { + margin-top: 10px; + margin-bottom: 10px; +} + +.highlight pre { + border-style: solid; + padding-top: 5px; + padding-left: 10px; + padding-bottom: 5px; +} + +code { + white-space: pre-wrap; +} diff --git a/public/index.html b/public/index.html @@ -0,0 +1,56 @@ +<!DOCTYPE html> +<html lang="en-us"><head> + <meta name="generator" content="Hugo 0.87.0" /> + <meta charset="UTF-8"> + <meta name="viewport" content="width=device-width"> + <title>christianermann.dev</title> + <link rel="stylesheet" href="/css/styles.css"> +</head> +<body><header> + <div id="title"> + <a href="https://www.christianermann.dev">Christian Ermann</a> + </div> + <nav> + + <a href="/">Main</a>. + + <a href="/posts/">Posts</a>. + + <a href="/tags/">Tags</a>. + + <a href="/resume.pdf">Resume</a>. + + </nav> +</header> + + + + <div class="summary"> + <h2><a href="https://www.christianermann.dev/posts/unbind/">Unbind Your Vertex Array Objects.</a></h2> + <div class="summary_metadata"> + <time>2021-08-25</time> + + <a href="/tags/opengl">OpenGL</a>. + + <a href="/tags/c">C</a>. + + </div> + <div class="summary_body"> + When I first started learning about OpenGL, I always made sure to unbind each resource as soon as I was done using it. Over time I became more lenient with unbinding, as in many cases leaving resources bound is okay and leads to fewer API calls. + </div> + + <a href="https://www.christianermann.dev/posts/unbind/">Read more...</a> + +</div> + + +<footer> + + <a href="https://github.com/c2000e">Github</a>. + + <a href="https://www.linkedin.com/in/christian-ermann/">LinkedIn</a>. + + <p>Copyright © 2021 Christian Ermann.</p> +</footer> +</body> +</html> diff --git a/public/index.xml b/public/index.xml @@ -0,0 +1,20 @@ +<?xml version="1.0" encoding="utf-8" standalone="yes"?> +<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"> + <channel> + <title>christianermann.dev on Christian Ermann</title> + <link>https://www.christianermann.dev/</link> + <description>Recent content in christianermann.dev on Christian Ermann</description> + <generator>Hugo -- gohugo.io</generator> + <language>en-us</language> + <lastBuildDate>Wed, 25 Aug 2021 14:33:02 -0500</lastBuildDate><atom:link href="https://www.christianermann.dev/index.xml" rel="self" type="application/rss+xml" /> + <item> + <title>Unbind Your Vertex Array Objects.</title> + <link>https://www.christianermann.dev/posts/unbind/</link> + <pubDate>Wed, 25 Aug 2021 14:33:02 -0500</pubDate> + + <guid>https://www.christianermann.dev/posts/unbind/</guid> + <description>When I first started learning about OpenGL, I always made sure to unbind each resource as soon as I was done using it. Over time I became more lenient with unbinding, as in many cases leaving resources bound is okay and leads to fewer API calls.</description> + </item> + + </channel> +</rss> diff --git a/public/posts/index.html b/public/posts/index.html @@ -0,0 +1,47 @@ +<!DOCTYPE html> +<html lang="en-us"><head> + <meta charset="UTF-8"> + <meta name="viewport" content="width=device-width"> + <title>Posts</title> + <link rel="stylesheet" href="/css/styles.css"> +</head> +<body><header> + <div id="title"> + <a href="https://www.christianermann.dev">Christian Ermann</a> + </div> + <nav> + + <a href="/">Main</a>. + + <a href="/posts/">Posts</a>. + + <a href="/tags/">Tags</a>. + + <a href="/resume.pdf">Resume</a>. + + </nav> +</header> + + <h1>Posts</h1> + <ul> + + <li> + <time>2021-08-25</time> + <a href="https://www.christianermann.dev/posts/unbind/">Unbind Your Vertex Array Objects.</a> + </li> + + </ul> + <div> + +</div> + +<footer> + + <a href="https://github.com/c2000e">Github</a>. + + <a href="https://www.linkedin.com/in/christian-ermann/">LinkedIn</a>. + + <p>Copyright © 2021 Christian Ermann.</p> +</footer> +</body> +</html> diff --git a/public/posts/index.xml b/public/posts/index.xml @@ -0,0 +1,20 @@ +<?xml version="1.0" encoding="utf-8" standalone="yes"?> +<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"> + <channel> + <title>Posts on Christian Ermann</title> + <link>https://www.christianermann.dev/posts/</link> + <description>Recent content in Posts on Christian Ermann</description> + <generator>Hugo -- gohugo.io</generator> + <language>en-us</language> + <lastBuildDate>Wed, 25 Aug 2021 14:33:02 -0500</lastBuildDate><atom:link href="https://www.christianermann.dev/posts/index.xml" rel="self" type="application/rss+xml" /> + <item> + <title>Unbind Your Vertex Array Objects.</title> + <link>https://www.christianermann.dev/posts/unbind/</link> + <pubDate>Wed, 25 Aug 2021 14:33:02 -0500</pubDate> + + <guid>https://www.christianermann.dev/posts/unbind/</guid> + <description>When I first started learning about OpenGL, I always made sure to unbind each resource as soon as I was done using it. Over time I became more lenient with unbinding, as in many cases leaving resources bound is okay and leads to fewer API calls.</description> + </item> + + </channel> +</rss> diff --git a/public/posts/page/1/index.html b/public/posts/page/1/index.html @@ -0,0 +1 @@ +<!DOCTYPE html><html><head><title>https://www.christianermann.dev/posts/</title><link rel="canonical" href="https://www.christianermann.dev/posts/"/><meta name="robots" content="noindex"><meta charset="utf-8" /><meta http-equiv="refresh" content="0; url=https://www.christianermann.dev/posts/" /></head></html> +\ No newline at end of file diff --git a/public/posts/unbind/index.html b/public/posts/unbind/index.html @@ -0,0 +1,88 @@ +<!DOCTYPE html> +<html lang="en-us"><head> + <meta charset="UTF-8"> + <meta name="viewport" content="width=device-width"> + <title>Unbind Your Vertex Array Objects.</title> + <link rel="stylesheet" href="/css/styles.css"> +</head> +<body><header> + <div id="title"> + <a href="https://www.christianermann.dev">Christian Ermann</a> + </div> + <nav> + + <a href="/">Main</a>. + + <a href="/posts/">Posts</a>. + + <a href="/tags/">Tags</a>. + + <a href="/resume.pdf">Resume</a>. + + </nav> +</header> + + <article> + <h1>Unbind Your Vertex Array Objects.</h1> + <div><p>When I first started learning about OpenGL, I always made sure to unbind each resource as soon as I was done using it. Over time I became more lenient with unbinding, as in many cases leaving resources bound is okay and leads to fewer API calls.</p> +<p>In addition, when I’m developing on my PC I have access to the newer Direct State Access (DSA) functions, so binding resources isn’t something I have to worry about as much. However, I do a fair amount of programming on my macbook which means I don’t always have access to the DSA functions.</p> +<p>I was working on a project recently that involved the vertex and index data for a mesh frequently changing. The actual mesh struct has a bit more going on, but we can think of it like this for now:</p> +<div class="highlight"><pre tabindex="0" style="color:#272822;background-color:#fafafa;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-c" data-lang="c"><span style="color:#00a8c8">typedef</span> <span style="color:#00a8c8">struct</span> <span style="color:#111">{</span> + <span style="color:#111">Vec3</span> <span style="color:#f92672">*</span><span style="color:#111">vertices</span><span style="color:#111">;</span> + <span style="color:#111">GLuint</span> <span style="color:#f92672">*</span><span style="color:#111">indices</span><span style="color:#111">;</span> + <span style="color:#111">GLuint</span> <span style="color:#111">vao</span><span style="color:#111">;</span> + <span style="color:#111">GLuint</span> <span style="color:#111">vbo</span><span style="color:#111">;</span> + <span style="color:#111">GLuint</span> <span style="color:#111">ebo</span><span style="color:#111">;</span> +<span style="color:#111">}</span> <span style="color:#111">Mesh</span><span style="color:#111">;</span></code></pre></div> +<p>So when it comes time to update the vertex or index data, we map the vertex buffer object to the vertices pointer and the element buffer object to the indices pointer. Then we can write all of our vertex and index data directly to the buffers, and then unmap them when we’re all done and need to draw.</p> +<div class="highlight"><pre tabindex="0" style="color:#272822;background-color:#fafafa;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-c" data-lang="c"><span style="color:#111">...</span> + +<span style="color:#111">glBindBuffer</span><span style="color:#111">(</span><span style="color:#111">GL_ARRAY_BUFFER</span><span style="color:#111">,</span> <span style="color:#111">mesh</span><span style="color:#f92672">-></span><span style="color:#111">vbo</span><span style="color:#111">);</span> +<span style="color:#111">mesh</span><span style="color:#f92672">-></span><span style="color:#111">vertices</span> <span style="color:#f92672">=</span> <span style="color:#111">glMapBuffer</span><span style="color:#111">(</span><span style="color:#111">GL_ARRAY_BUFFER</span><span style="color:#111">,</span> <span style="color:#111">GL_WRITE_ONLY</span><span style="color:#111">);</span> + +<span style="color:#111">glBindBuffer</span><span style="color:#111">(</span><span style="color:#111">GL_ELEMENT_ARRAY_BUFFER</span><span style="color:#111">,</span> <span style="color:#111">mesh</span><span style="color:#f92672">-></span><span style="color:#111">ebo</span><span style="color:#111">);</span> +<span style="color:#111">mesh</span><span style="color:#f92672">-></span><span style="color:#111">indices</span> <span style="color:#f92672">=</span> <span style="color:#111">glMapBuffer</span><span style="color:#111">(</span><span style="color:#111">GL_ELEMENT_ARRAY_BUFFER</span><span style="color:#111">,</span> <span style="color:#111">GL_WRITE_ONLY</span><span style="color:#111">);</span> + +<span style="color:#75715e">// While we have the buffers mapped, we can write data directly to +</span><span style="color:#75715e">// mesh->vertices and mesh->indices. +</span><span style="color:#75715e"></span> +<span style="color:#111">glBindBuffer</span><span style="color:#111">(</span><span style="color:#111">GL_ARRAY_BUFFER</span><span style="color:#111">,</span> <span style="color:#111">mesh</span><span style="color:#f92672">-></span><span style="color:#111">vbo</span><span style="color:#111">);</span> +<span style="color:#111">glUnmapBuffer</span><span style="color:#111">(</span><span style="color:#111">GL_ARRAY_BUFFER</span><span style="color:#111">);</span> +<span style="color:#111">mesh</span><span style="color:#f92672">-></span><span style="color:#111">vertices</span> <span style="color:#f92672">=</span> <span style="color:#111">NULL</span> + +<span style="color:#111">glBindBuffer</span><span style="color:#111">(</span><span style="color:#111">GL_ELEMENT_ARRAY_BUFFER</span><span style="color:#111">,</span> <span style="color:#111">mesh</span><span style="color:#f92672">-></span><span style="color:#111">ebo</span><span style="color:#111">);</span> +<span style="color:#111">glUnmapBuffer</span><span style="color:#111">(</span><span style="color:#111">GL_ELEMENT_ARRAY_BUFFER</span><span style="color:#111">);</span> +<span style="color:#111">mesh</span><span style="color:#f92672">-></span><span style="color:#111">indices</span> <span style="color:#f92672">=</span> <span style="color:#111">NULL</span> + +<span style="color:#75715e">// Now that the buffers are unmapped, we can draw the mesh again. +</span><span style="color:#75715e"></span> +<span style="color:#111">...</span></code></pre></div> +<p>Leaving the buffers bound in the above snippet didn’t cause problems and seemed a reasonable thing to do to reduce unnecessary OpenGL calls. +The issues I was running into were actually caused by how I was drawing each mesh:</p> +<div class="highlight"><pre tabindex="0" style="color:#272822;background-color:#fafafa;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-c" data-lang="c"><span style="color:#111">...</span> + +<span style="color:#111">glBindVertexArray</span><span style="color:#111">(</span><span style="color:#111">mesh</span><span style="color:#f92672">-></span><span style="color:#111">vao</span><span style="color:#111">);</span> +<span style="color:#111">glDrawElements</span><span style="color:#111">(...);</span> + +<span style="color:#111">...</span></code></pre></div> +<p>Since I wasn’t unbinding the mesh’s vertex array object when I finished drawing it, when I updated another mesh’s vertex or index data and bound that mesh’s buffer objects, the vertex array object I forgot to unbind would now be using the incorrect buffers to draw with.</p> +<p>Luckily, there was a simple fix, and now I know to be more careful with unbinding vertex array objects:</p> +<div class="highlight"><pre tabindex="0" style="color:#272822;background-color:#fafafa;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-c" data-lang="c"><span style="color:#111">...</span> + +<span style="color:#111">glBindVertexArray</span><span style="color:#111">(</span><span style="color:#111">mesh</span><span style="color:#f92672">-></span><span style="color:#111">vao</span><span style="color:#111">);</span> +<span style="color:#111">glDrawElements</span><span style="color:#111">(...);</span> +<span style="color:#111">glBindVertexArray</span><span style="color:#111">(</span><span style="color:#ae81ff">0</span><span style="color:#111">);</span> + +<span style="color:#111">...</span></code></pre></div> +</div> + </article> +<footer> + + <a href="https://github.com/c2000e">Github</a>. + + <a href="https://www.linkedin.com/in/christian-ermann/">LinkedIn</a>. + + <p>Copyright © 2021 Christian Ermann.</p> +</footer> +</body> +</html> diff --git a/resume.pdf b/public/resume.pdf Binary files differ. diff --git a/public/sitemap.xml b/public/sitemap.xml @@ -0,0 +1,25 @@ +<?xml version="1.0" encoding="utf-8" standalone="yes"?> +<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" + xmlns:xhtml="http://www.w3.org/1999/xhtml"> + <url> + <loc>https://www.christianermann.dev/tags/c/</loc> + <lastmod>2021-08-25T14:33:02-05:00</lastmod> + </url><url> + <loc>https://www.christianermann.dev/</loc> + <lastmod>2021-08-25T14:33:02-05:00</lastmod> + </url><url> + <loc>https://www.christianermann.dev/tags/opengl/</loc> + <lastmod>2021-08-25T14:33:02-05:00</lastmod> + </url><url> + <loc>https://www.christianermann.dev/posts/</loc> + <lastmod>2021-08-25T14:33:02-05:00</lastmod> + </url><url> + <loc>https://www.christianermann.dev/tags/</loc> + <lastmod>2021-08-25T14:33:02-05:00</lastmod> + </url><url> + <loc>https://www.christianermann.dev/posts/unbind/</loc> + <lastmod>2021-08-25T14:33:02-05:00</lastmod> + </url><url> + <loc>https://www.christianermann.dev/categories/</loc> + </url> +</urlset> diff --git a/public/tags/c/index.html b/public/tags/c/index.html @@ -0,0 +1,47 @@ +<!DOCTYPE html> +<html lang="en-us"><head> + <meta charset="UTF-8"> + <meta name="viewport" content="width=device-width"> + <title>C</title> + <link rel="stylesheet" href="/css/styles.css"> +</head> +<body><header> + <div id="title"> + <a href="https://www.christianermann.dev">Christian Ermann</a> + </div> + <nav> + + <a href="/">Main</a>. + + <a href="/posts/">Posts</a>. + + <a href="/tags/">Tags</a>. + + <a href="/resume.pdf">Resume</a>. + + </nav> +</header> + + <h1>C</h1> + <ul> + + <li> + <time>2021-08-25</time> + <a href="https://www.christianermann.dev/posts/unbind/">Unbind Your Vertex Array Objects.</a> + </li> + + </ul> + <div> + +</div> + +<footer> + + <a href="https://github.com/c2000e">Github</a>. + + <a href="https://www.linkedin.com/in/christian-ermann/">LinkedIn</a>. + + <p>Copyright © 2021 Christian Ermann.</p> +</footer> +</body> +</html> diff --git a/public/tags/c/index.xml b/public/tags/c/index.xml @@ -0,0 +1,20 @@ +<?xml version="1.0" encoding="utf-8" standalone="yes"?> +<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"> + <channel> + <title>C on Christian Ermann</title> + <link>https://www.christianermann.dev/tags/c/</link> + <description>Recent content in C on Christian Ermann</description> + <generator>Hugo -- gohugo.io</generator> + <language>en-us</language> + <lastBuildDate>Wed, 25 Aug 2021 14:33:02 -0500</lastBuildDate><atom:link href="https://www.christianermann.dev/tags/c/index.xml" rel="self" type="application/rss+xml" /> + <item> + <title>Unbind Your Vertex Array Objects.</title> + <link>https://www.christianermann.dev/posts/unbind/</link> + <pubDate>Wed, 25 Aug 2021 14:33:02 -0500</pubDate> + + <guid>https://www.christianermann.dev/posts/unbind/</guid> + <description>When I first started learning about OpenGL, I always made sure to unbind each resource as soon as I was done using it. Over time I became more lenient with unbinding, as in many cases leaving resources bound is okay and leads to fewer API calls.</description> + </item> + + </channel> +</rss> diff --git a/public/tags/c/page/1/index.html b/public/tags/c/page/1/index.html @@ -0,0 +1 @@ +<!DOCTYPE html><html><head><title>https://www.christianermann.dev/tags/c/</title><link rel="canonical" href="https://www.christianermann.dev/tags/c/"/><meta name="robots" content="noindex"><meta charset="utf-8" /><meta http-equiv="refresh" content="0; url=https://www.christianermann.dev/tags/c/" /></head></html> +\ No newline at end of file diff --git a/public/tags/index.html b/public/tags/index.html @@ -0,0 +1,46 @@ +<!DOCTYPE html> +<html lang="en-us"><head> + <meta charset="UTF-8"> + <meta name="viewport" content="width=device-width"> + <title>Tags</title> + <link rel="stylesheet" href="/css/styles.css"> +</head> +<body><header> + <div id="title"> + <a href="https://www.christianermann.dev">Christian Ermann</a> + </div> + <nav> + + <a href="/">Main</a>. + + <a href="/posts/">Posts</a>. + + <a href="/tags/">Tags</a>. + + <a href="/resume.pdf">Resume</a>. + + </nav> +</header> + + <h1>Tags</h1> + <ul> + + <li><a href="https://www.christianermann.dev/tags/c/">C</a></li> + + <li><a href="https://www.christianermann.dev/tags/opengl/">OpenGL</a></li> + + </ul> + <div> + +</div> + +<footer> + + <a href="https://github.com/c2000e">Github</a>. + + <a href="https://www.linkedin.com/in/christian-ermann/">LinkedIn</a>. + + <p>Copyright © 2021 Christian Ermann.</p> +</footer> +</body> +</html> diff --git a/public/tags/index.xml b/public/tags/index.xml @@ -0,0 +1,29 @@ +<?xml version="1.0" encoding="utf-8" standalone="yes"?> +<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"> + <channel> + <title>Tags on Christian Ermann</title> + <link>https://www.christianermann.dev/tags/</link> + <description>Recent content in Tags on Christian Ermann</description> + <generator>Hugo -- gohugo.io</generator> + <language>en-us</language> + <lastBuildDate>Wed, 25 Aug 2021 14:33:02 -0500</lastBuildDate><atom:link href="https://www.christianermann.dev/tags/index.xml" rel="self" type="application/rss+xml" /> + <item> + <title>C</title> + <link>https://www.christianermann.dev/tags/c/</link> + <pubDate>Wed, 25 Aug 2021 14:33:02 -0500</pubDate> + + <guid>https://www.christianermann.dev/tags/c/</guid> + <description></description> + </item> + + <item> + <title>OpenGL</title> + <link>https://www.christianermann.dev/tags/opengl/</link> + <pubDate>Wed, 25 Aug 2021 14:33:02 -0500</pubDate> + + <guid>https://www.christianermann.dev/tags/opengl/</guid> + <description></description> + </item> + + </channel> +</rss> diff --git a/public/tags/opengl/index.html b/public/tags/opengl/index.html @@ -0,0 +1,47 @@ +<!DOCTYPE html> +<html lang="en-us"><head> + <meta charset="UTF-8"> + <meta name="viewport" content="width=device-width"> + <title>OpenGL</title> + <link rel="stylesheet" href="/css/styles.css"> +</head> +<body><header> + <div id="title"> + <a href="https://www.christianermann.dev">Christian Ermann</a> + </div> + <nav> + + <a href="/">Main</a>. + + <a href="/posts/">Posts</a>. + + <a href="/tags/">Tags</a>. + + <a href="/resume.pdf">Resume</a>. + + </nav> +</header> + + <h1>OpenGL</h1> + <ul> + + <li> + <time>2021-08-25</time> + <a href="https://www.christianermann.dev/posts/unbind/">Unbind Your Vertex Array Objects.</a> + </li> + + </ul> + <div> + +</div> + +<footer> + + <a href="https://github.com/c2000e">Github</a>. + + <a href="https://www.linkedin.com/in/christian-ermann/">LinkedIn</a>. + + <p>Copyright © 2021 Christian Ermann.</p> +</footer> +</body> +</html> diff --git a/public/tags/opengl/index.xml b/public/tags/opengl/index.xml @@ -0,0 +1,20 @@ +<?xml version="1.0" encoding="utf-8" standalone="yes"?> +<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"> + <channel> + <title>OpenGL on Christian Ermann</title> + <link>https://www.christianermann.dev/tags/opengl/</link> + <description>Recent content in OpenGL on Christian Ermann</description> + <generator>Hugo -- gohugo.io</generator> + <language>en-us</language> + <lastBuildDate>Wed, 25 Aug 2021 14:33:02 -0500</lastBuildDate><atom:link href="https://www.christianermann.dev/tags/opengl/index.xml" rel="self" type="application/rss+xml" /> + <item> + <title>Unbind Your Vertex Array Objects.</title> + <link>https://www.christianermann.dev/posts/unbind/</link> + <pubDate>Wed, 25 Aug 2021 14:33:02 -0500</pubDate> + + <guid>https://www.christianermann.dev/posts/unbind/</guid> + <description>When I first started learning about OpenGL, I always made sure to unbind each resource as soon as I was done using it. Over time I became more lenient with unbinding, as in many cases leaving resources bound is okay and leads to fewer API calls.</description> + </item> + + </channel> +</rss> diff --git a/public/tags/opengl/page/1/index.html b/public/tags/opengl/page/1/index.html @@ -0,0 +1 @@ +<!DOCTYPE html><html><head><title>https://www.christianermann.dev/tags/opengl/</title><link rel="canonical" href="https://www.christianermann.dev/tags/opengl/"/><meta name="robots" content="noindex"><meta charset="utf-8" /><meta http-equiv="refresh" content="0; url=https://www.christianermann.dev/tags/opengl/" /></head></html> +\ No newline at end of file diff --git a/public/tags/page/1/index.html b/public/tags/page/1/index.html @@ -0,0 +1 @@ +<!DOCTYPE html><html><head><title>https://www.christianermann.dev/tags/</title><link rel="canonical" href="https://www.christianermann.dev/tags/"/><meta name="robots" content="noindex"><meta charset="utf-8" /><meta http-equiv="refresh" content="0; url=https://www.christianermann.dev/tags/" /></head></html> +\ No newline at end of file diff --git a/resume.pdf b/static/resume.pdf Binary files differ. diff --git a/styles.css b/styles.css @@ -1,107 +0,0 @@ -* { - margin: 0; - padding: 0; -} - -ul { - list-style: none; -} - -a { - text-decoration: none; -} - -a:link { - color: #FA3253; -} - -a:visited { - color: #FA3253; -} - -a:hover { - color: #FA3253; - text-decoration: underline; -} - -html { - width: 100%; - height: 100%; -} - -body { - background-color: rgb(234, 231, 220); - margin: auto; - max-width: 600px; - font-family: 'Open Sans', sans-serif; -} - -#header { - margin-top: 1em; - display: flex; - flex-direction: row; - justify-content: space-between; -} - -#header nav { - align-self: center; -} - -#header a { - margin-left: 1em; -} - -#introduction { - margin-left: 1em; - margin-bottom: 2em; - display: flex; - flex-direction: column; -} - -#projects { - margin-bottom: 2em; - display: flex; - flex-direction: column; -} - -.project { - margin-left: 1em; - margin-bottom: 1em; -} - -.project p { - margin-left: 1em; -} - -#achievements { - margin-bottom: 2em; - display: flex; - flex-direction: column; -} - -#achievements ul { - margin-left: 2em; - list-style-position: outside; - list-style-type: disc; -} - -#achievements ul li { - margin-bottom: 1em; -} - -#footer { - margin-bottom: 2em; -} - -@media only screen and (max-width: 800px) -{ - body { - max-width: 400px; - width: 90%; - } - - #header a { - margin-left: 0em; - } -} - diff --git a/themes/simple b/themes/simple @@ -0,0 +1 @@ +Subproject commit a896142a54fde2c4b4a84e80bbcf375cb2bacca0