glsl

I've been working on a game engine for educational purposes and I came across this issue I cannot seem to find an answer for: Alpha channel only works for objects that have already been drawn before the object that has the alpha channel (For example: in a scene with 3 objects, let's say a cat, a dog and a bottle(transparent). both the cat and the dog are behind the bottle; the dog is drawn first, the bottle second, the cat third. only the dog will be seen through the bottle). Here's a picture of this issue: I used C++ for the engine, Win32 API for the editor and GLSL for shading: // some code

As others have discussed , GLSL lacks any kind of printf debugging. But sometimes I really want to examine numeric values while debugging my shaders. I've been trying to create a visual debugging tool. I found that it's possible to render an arbitrary series of digits fairly easily in a shader, if you work with a sampler2D in which the digits 0123456789 have been rendered in monospace. Basically, you just juggle your x coordinate. Now, to use this to examine a floating-point number, I need an algorithm for converting a float to a sequence of decimal digits, such as you might find in any printf

The vec3 type is a very nice type. It only takes up 3 floats, and I have data that only needs 3 floats. And I want to use one in a structure in a UBO and/or SSBO: layout(std140) uniform UBO { vec4 data1; vec3 data2; float data3; }; layout(std430) buffer SSBO { vec4 data1; vec3 data2; float data3; }; Then, in my C or C++ code, I can do this to create matching data structures: struct UBO { vector4 data1; vector3 data2; float data3; }; struct SSBO { vector4 data1; vector3 data2; float data3; }; Is this a good idea? Nicol Bolas NO! Never do this! When declaring UBOs/SSBOs, pretend that all 3