glsl

问题 I am junior developer attempting to create a swipe effect from left to right. Where the logo disappears/gets erased from left to right and then appears from right to left. I've new to GLSL and have never programmed in C++. All my attempts have created varying results. The current result is that the logo it self gets compressed from left to right. So I would be very thankful if someone could give some advice as to code examples that have a similar effect or explain what i'm doing wrong here.

问题 As title said, Can I do this in my program: vertex = glCreateShader(GL_VERTEX_SHADER); /* ... */ fragment = glCreateShader(GL_FRAGMENT_SHADER); /* ... */ program = glCreateProgram(); glAttachShader(program, vertex); glAttachShader(program, fragment); glLinkProgram(program); /* All things done */ glDeleteShader(vertex); /* <~ Can I do this now? */ glDeleteShader(vertex); /* <~ Can I do this now? */ /* And in render procedure */ glUseProgram(program); /* <~ Still use program without any problem

问题 I have similar code as in this question: some opengl and glm explanation I have a combined matrix that I pass as a single uniform //C++ mat4 combinedMatrix = projection * view * model; //GLSL doesn't work out_position = combinedMatrix * vec4(vertex, 1.0); It doesn't work. But if I do all the multiplication in the shader so I pass in each individual matrix and get //GLSL works out_position = projection * view * model * vec4(vertex, 1.0); It works. I can't see anything wrong with my matrices in

问题 I read that in layered rendering, we create a 2D texture array (GL_TEXTURE_2D_ARRAY): glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D_ARRAY, TextureColorbufferName); glTexParameteri(.... glTexImage3D(... and can attach it to FBO: glGenFramebuffers(1, &FramebufferName); glBindFramebuffer(GL_FRAMEBUFFER, FramebufferName); glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, TextureColorbufferName, 0); What i find hard to understand visually is how can a layer of textures be

问题 Here's my vertex shader: attribute vec3 aVertexPosition; attribute vec4 aVertexColor; attribute float type; uniform mat4 uMVMatrix; uniform mat4 uPMatrix; varying vec4 vColor; void main(void) { gl_Position = uPMatrix * uMVMatrix * vec4(aVertexPosition, 1.0); vColor = aVertexColor; if(type > 0.0) { } else { } } What I want to do is pretty simple, just capture a float value named type and use it for logic operates. The problem is, when I try to use it in Javascript, the error comes:

问题 I am trying to implement Phong lighting. In some tutorials specular lighting is added to ambient and diffuse lighting and then total lighting is multiplied by texture color. I also saw a tutorial where specular lighting was added separately after the addition of ambient and diffuse lights was multiplied with texture color. Here is a fragment shader with both options present and with screenshots. #version 330 core out vec4 FragColor; in vec2 TexCoord; in vec3 normals; in vec3 fragPosition; /

问题 I am writing some OpenGL code to draw a small dot in a window, but when I try to use my own shaders, I get an error message which I don't understand. So, here's my main function: int main(int argc, char** argv) { // Initialize some things glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA); glutInitWindowSize(100, 100); glutCreateWindow("OpenGL Test"); glutDisplayFunc(RenderScene); glewInit(); glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // Make the vertex buffer Vector3f vertices[1]

问题 I need to pass a 2D texture array to a fragment shader that performs texelFetch and bitwise operations over uchar elements. For this reason, I need to create a texture with a very specific internal format, that guarantees that my texels are in unsigned byte integer, and that no scaling operations not casting to float is performed. I already have my image buffers in generic uint8_t* arrays. So I am doing this: osg::Texture2DArray texture = new osg::Texture2DArray; for (int i = 0; i < ntextures

问题 I am trying to achieve polygon blowing and reassembling effect similar to: http://na.leagueoflegends.com/en/featured/skins/project-2016 https://tkmh.me/ In both of these examples, you can see how they are morphing / transitioning the vertices from one 3d model to another, resulting in a pretty cool effect. I have something similar working, but I can't wrap my head around how they are transitioning the vertices with velocity offsets (please refer to the first link and see how the particles don

问题 I'm learning SceneKit and while using GLSL. I'm having hard time understanding using glsl with SceneKit, e.g., how to load glsl shaders in SceneKit and apply it to a geometry. lets say we have: SCNBox *box = [SCNBox boxWithWidth:50 height:50 length:50 chamferRadius:0]; SCNNode *bNode = [SCNNode nodeWithGeometry:box]; SCNMaterial *redMaterial = [SCNMaterial material]; redMaterial.diffuse.contents = [UIColor redColor]; redMaterial.locksAmbientWithDiffuse = YES; box.materials = @[redMaterial];