shader

问题 Problem Description Hi! In our WebGL application, we are drawing many (even hundreds of thousands) shapes and we want to discover which shape is currently under the mouse. I'm looking for a way to do it in an efficient manner. Details The shapes are defined with Signed Distance Functions. Each shape is drawn by applying a predefined sdf fragment shader to a square polygon (2 triangles). Each shape is assigned with a unique ID ( uint ) on the Rust side (we're using WASM here). The idea is to

问题 Problem Description Hi! In our WebGL application, we are drawing many (even hundreds of thousands) shapes and we want to discover which shape is currently under the mouse. I'm looking for a way to do it in an efficient manner. Details The shapes are defined with Signed Distance Functions. Each shape is drawn by applying a predefined sdf fragment shader to a square polygon (2 triangles). Each shape is assigned with a unique ID ( uint ) on the Rust side (we're using WASM here). The idea is to

问题 I began to learn using shaders with QML, and I can't find any references that talk about default uniform and attribute values that are passed to the shaders. In certain examples, we can saw several of them like vertexPosition or modelViewProjection (that is also passed as mvp ), but there is no clear list containing all the variables that we can use. After investigating in Qt source code, I found out default name for many variables: uniform variables (found in renderview.cpp ) modelMatrix

问题 I have 9 quads made of triangles, like this: I'm using VBO to store data about them - their position and textures coordinates. My question is - is it possible to make the quad 5 to have a different texture than the rest of quads by using only one VBO and shader ? : Green color represents texture 1 and yellow - texture 2. So far I got: GLfloat vertices[] = { // Positions 0.0f, 0.0f, ... // Texture coordinates 0.0f, 0.0f, ... }; I'm creating VBO by using that vertices[] array, and then I'm

问题 I have 9 quads made of triangles, like this: I'm using VBO to store data about them - their position and textures coordinates. My question is - is it possible to make the quad 5 to have a different texture than the rest of quads by using only one VBO and shader ? : Green color represents texture 1 and yellow - texture 2. So far I got: GLfloat vertices[] = { // Positions 0.0f, 0.0f, ... // Texture coordinates 0.0f, 0.0f, ... }; I'm creating VBO by using that vertices[] array, and then I'm

问题 I draw patterns which have detailed pixels and they often face with Moire effect. I am not good at shading and I am not sure if this problem will be solved by shaders. I have not found any basic, understandable and complete example of shaders. Most of the tutorial websites start a program from the middle omitting the header file includes! This is a MWE of my code. Is it possible to mitigate or remove the Moire effect from it? #include <cmath> #include <vector> #ifdef __APPLE__ #include <GLUT

问题 I draw patterns which have detailed pixels and they often face with Moire effect. I am not good at shading and I am not sure if this problem will be solved by shaders. I have not found any basic, understandable and complete example of shaders. Most of the tutorial websites start a program from the middle omitting the header file includes! This is a MWE of my code. Is it possible to mitigate or remove the Moire effect from it? #include <cmath> #include <vector> #ifdef __APPLE__ #include <GLUT

问题 Hy everyone, I need to know, how do I can create so a Gradient colors from topLeft to bottomRight withhin a shader in flutter like in example 2 in this image? I tried with this mini shader code to do this, but it still doesn't working for me. final Shader linearGradient = LinearGradient( colors: <Color>[ Color(0xff002fff), Color(0xff00f4ff), ], ).createShader(Rect.fromCircle(center: Offset(200, 0), radius: 150)); Could anybody have a ideea, how can this be created? Or it's not impossible

问题 This is the second time I'm making a game engine, but I'm a little stuck right now, since I cannot figure out why this is happening, no matter what object I send, OpenGL only draws a White Triangle on the center of the screen, like this. I've even coppied my old code from my last engine on the Renderer and the Camera Objects, still acts the same, so I´m guessing it has something to do with the Render Script. Renderer: Renderer2D::Renderer2D(const Shader& shader) { this->shader = shader; this-

问题 This is the second time I'm making a game engine, but I'm a little stuck right now, since I cannot figure out why this is happening, no matter what object I send, OpenGL only draws a White Triangle on the center of the screen, like this. I've even coppied my old code from my last engine on the Renderer and the Camera Objects, still acts the same, so I´m guessing it has something to do with the Render Script. Renderer: Renderer2D::Renderer2D(const Shader& shader) { this->shader = shader; this-