https://blog.arcanelab.com/tags/opengl/Recent content in Opengl on Arcanelab BlogHugoen-USZoltán MajorosWed, 23 Aug 2017 13:25:00 +0200https://blog.arcanelab.com/2017/08/twofield-shadertoy-click-and-drag-to-change-camera-position/Wed, 23 Aug 2017 13:25:00 +0200https://blog.arcanelab.com/2017/08/twofield-shadertoy-click-and-drag-to-change-camera-position/<h1>Twofield [shadertoy]</h1> <p></p> <p>Click and drag to change camera position.</p>https://blog.arcanelab.com/2017/07/how-can-i-get-view-direction-from-the-opengl-modelview/Thu, 06 Jul 2017 18:22:00 +0200https://blog.arcanelab.com/2017/07/how-can-i-get-view-direction-from-the-opengl-modelview/https://blog.arcanelab.com/2017/05/how-do-you-composite-3d-scenekit-content-onto-video-frames/Wed, 10 May 2017 11:36:00 +0200https://blog.arcanelab.com/2017/05/how-do-you-composite-3d-scenekit-content-onto-video-frames/https://blog.arcanelab.com/2017/05/confusion-between-c-and-opengl-matrix-order-row-major-vs/Thu, 04 May 2017 17:29:00 +0200https://blog.arcanelab.com/2017/05/confusion-between-c-and-opengl-matrix-order-row-major-vs/https://blog.arcanelab.com/2017/04/mouse-picking-with-ray-casting-anton-s-opengl-4-notes/Wed, 19 Apr 2017 15:47:00 +0200https://blog.arcanelab.com/2017/04/mouse-picking-with-ray-casting-anton-s-opengl-4-notes/https://blog.arcanelab.com/2017/04/cables-interactive-visuals-made-from-cable-salad/Mon, 17 Apr 2017 13:44:00 +0200https://blog.arcanelab.com/2017/04/cables-interactive-visuals-made-from-cable-salad/https://blog.arcanelab.com/2017/04/learn-opengl-extensive-tutorial-resource-for-learning/Sat, 15 Apr 2017 23:55:00 +0200https://blog.arcanelab.com/2017/04/learn-opengl-extensive-tutorial-resource-for-learning/https://blog.arcanelab.com/2017/04/introductory-democoding-with-shadertoy/Sat, 15 Apr 2017 12:54:00 +0200https://blog.arcanelab.com/2017/04/introductory-democoding-with-shadertoy/https://blog.arcanelab.com/2017/04/polytonic-glitter/Fri, 14 Apr 2017 21:56:00 +0200https://blog.arcanelab.com/2017/04/polytonic-glitter/https://blog.arcanelab.com/2016/03/procedural-glfast/Thu, 31 Mar 2016 01:19:00 +0200https://blog.arcanelab.com/2016/03/procedural-glfast/https://blog.arcanelab.com/2016/02/opengl-pipeline-map/Sun, 07 Feb 2016 13:40:00 +0100https://blog.arcanelab.com/2016/02/opengl-pipeline-map/https://blog.arcanelab.com/2016/01/maizensh-glfx/Fri, 29 Jan 2016 22:27:00 +0100https://blog.arcanelab.com/2016/01/maizensh-glfx/https://blog.arcanelab.com/2016/01/opengl-es-glsl-types-void-bool-bvec2-bvec3-bvec4-int-ivec2/Mon, 18 Jan 2016 22:29:00 +0100https://blog.arcanelab.com/2016/01/opengl-es-glsl-types-void-bool-bvec2-bvec3-bvec4-int-ivec2/<h1>OpenGL ES GLSL</h1> <h2>Types</h2> <ul> <li>void</li> <li>bool, bvec2, bvec3, bvec4</li> <li>int, ivec2, ivec3, ivec4</li> <li>float, vec2, vec3, vec4</li> <li>mat2, mat3, mat4</li> <li>struct</li> <li>arrays</li> <li>sampler2D, samplerCube</li> </ul> <h2>Qualifiers</h2> <ul> <li>const</li> <li>attribute: shared between the app and the vertex shader</li> <li>uniform: shared between the app and both shaders</li> <li>varying: shared between the two shaders</li> </ul> <h2>Precision Qualifiers</h2> <ul> <li>highp</li> <li>mediump</li> <li>lowp</li> </ul> <h2>Input Qualifiers</h2> <ul> <li>in: read only</li> <li>out: write only</li> <li>inout: r/w</li> </ul> <h2>Built-in Variables</h2> <h3>Vertex Shader</h3> <ul> <li>inout highp vec4 gl_Position</li> <li>in mediump float gl_PointSize</li> </ul> <h3>Fragment Shader</h3> <ul> <li>in mediump vec4 gl_FragCoord (in window coordiante system)</li> <li>in bool gl_FrontFacing</li> <li>in mediump int gl_PointCoord (only if the rendered primitive is a point)</li> <li>inout mediump vec4 gl_FragColor (RGBA)</li> </ul> <h2>Built-in Constants</h2> <h4>Vertex Shader</h4> <ul> <li>const mediump int gl_MaxVertexAttribs &gt;= 8</li> <li>const mediump int gl_MaxVertexUniformVectors &gt;= 128</li> <li>const mediump int gl_MaxVaryingVectors &gt;= 8</li> <li>const mediump int gl_MaxVertexTextureImageUnits &gt;= 0</li> <li>const mediump int gl_MaxCombinedTextureImageUnits &gt;= 8</li> </ul> <h4>Fragment Shader</h4> <ul> <li>const mediump int gl_MaxTextureImageUnits &gt;= 8</li> <li>const mediump int gl_MaxFragmentUniformVectors &gt;= 16</li> <li>const mediump int gl_MaxDrawBuffers = 1</li> </ul> <h2>Built-in Functions</h2> <p>T can be: float, vec2, vec3, vec4 M can be: mat2, mat3, mat4 V can be: vec2, vec3, vec4 bV can be: bvec2, bvec3, bvec4</p>https://blog.arcanelab.com/2015/11/filmic-games-filmic-tonemapping-operators/Mon, 02 Nov 2015 20:50:00 +0100https://blog.arcanelab.com/2015/11/filmic-games-filmic-tonemapping-operators/https://blog.arcanelab.com/2011/12/2d-drawing-in-opengl/Fri, 30 Dec 2011 06:44:00 +0100https://blog.arcanelab.com/2011/12/2d-drawing-in-opengl/