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  1. OpenGL stores matrices in column-major format—that is, ... uniform int aValue = 5; Note that initializing a uniform only sets that variable at the moment that the Program Object is successfully compiled and linked. The user can override this value by manually setting that uniform value. ... vec4 (vec2 (10.0, 11.0), 1.0, 3.5) == vec4 ...
  2. in int gl_VertexID; in int gl_InstanceID; in int gl_DrawID; // Requires GLSL 4.60 or ARB_shader_draw_parameters in int gl_BaseVertex; ... in vec4 gl_FragCoord; in bool gl_FrontFacing; in vec2 gl_PointCoord; gl_FragCoord The location of the fragment in window space. The X, Y and Z components are the window-space position of the fragment.
  3. stackoverflow.com

    If you are trying to pack all 4 channels into a single int, you need to set GL.VertexAttribIPointer(attributeIndex, 1, VertexAttribIntegerType.UnsignedByte, 0, rawData); and in your shader receive just a single uint instead of vec4. Then you can unpack from uint to vec4 with vec4 unpackUnorm4x8(uint p);. Also make sure it's uint and not int.
  4. learnwebgl.brown37.net

    Precision of int and float Data Types¶. Most programming languages define the range of values that can be stored in a specific data type. For example, an "int" in Java can store values in the range -2,147,483,648(-2 31) to 2,147,483,647 (2 31-1).GLSL let's you pick from three different precision levels for the basic data types.
  5. gamedev.stackexchange.com

    Is it possible to convert vec4 to int in GLSL (using OpenGL ES) Ask Question Asked 9 years, 6 months ago. Modified 9 years, 6 months ago. Viewed 8k times ... but it returns a vec4 value. Is it possible to convert vec4 to int in GLSL? opengl-es; Share. Follow edited Jun 24, 2015 at 13:17. Alex. 396 5 5 silver badges 13 13 bronze badges. asked ...
  6. en.wikibooks.org

    All details of GLSL for OpenGL ES 2.0 are specified in the "OpenGL ES Shading Language 1.0.17 Specification" available at the "Khronos OpenGL ES API Registry". A more accessible description of the OpenGL ES shading language is given in Chapter 5 and Appendix B of the book "OpenGL ES 2.0 Programming Guide" by Aaftab Munshi, Dan ...
  7. tsherif.github.io

    gl_FragCoord: mediump vec4: fragment position within frame buffer: window coordinates: gl_FrontFacing: bool: fragment belongs to a front-facing primitive: Boolean: gl_PointCoord: ... const mediump int: 1: 4: gl_MinProgramTexelOffset: const mediump int: N/A-8: gl_MaxProgramTexelOffset: const mediump int: N/A: 7: Built-in Uniforms. Uniform Type ...
  8. lighthouse3d.com

    For instance to define a vec4 named myVar we could write in a shader. uniform vec4 myVar; ... OpenGL offers a large family of function, to cover for all data types, and several ways of setting the values. For instance, consider the variable myVar as defined above. To set the vec4, and assuming p as an handle to a linked program, we could write:
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