vertex-shader

I have a scene with several models with individual positions and rotations. Given normals, the shaders apply simple bidirectional lighting to each pixel. That is my vertex shader. #version 150 in vec3 position; in vec3 normal; in vec2 texcoord; out vec3 f_normal; out vec2 f_texcoord; uniform mat4 model; uniform mat4 view; uniform mat4 proj; void main() { mat4 mvp = proj * view * model; f_normal = normal; f_texcoord = texcoord; gl_Position = mvp * vec4(position, 1.0); } And here is the fragment shader. #version 150 in vec3 f_normal; in vec2 f_texcoord; uniform sampler2D tex; vec3 sun = vec3(0.5

Before I go into details I want outline the problem: I use RWStructuredBuffers to store the output of my compute shaders (CS). Since vertex and pixel shaders can’t read from RWStructuredBuffers, I map a StructuredBuffer onto the same slot (u0/t0) and (u4/t4): cbuffer cbWorld : register (b1) { float4x4 worldViewProj; int dummy; } struct VS_IN { float4 pos : POSITION; float4 col : COLOR; }; struct PS_IN { float4 pos : SV_POSITION; float4 col : COLOR; }; RWStructuredBuffer<float4> colorOutputTable : register (u0); // 2D color data StructuredBuffer<float4> output2 : register (t0); // same as u0

All DirectX books and tutorials strongly recommend reducing resource allocations between draw calls to a minimum – yet I can’t find any guidelines that get more into details. Reviewing a lot of sample code found in the web, I have concluded that programmers have completely different coding principles regarding this subject. Some even set and unset VS/PS VS/PS ResourceViews RasterizerStage DepthStencilState PrimitiveTopology ... before and after every draw call (although the setup remains unchanged), and others don’t. I guess that's a bit overdone... From my own experiments I have found that

I have an STL file loaded into my scene with a single colour applied to a phong material I'd like a way of applying two colours to this mesh's material with a gradient effect applied on the Z axis a like the example below. Gradient Vase ] 1 I have a feeling I may have to introduce shaders but I've not gotten this far with three.js. Simple gradient shader, based on uvs: var scene = new THREE.Scene(); var camera = new THREE.PerspectiveCamera(60, 1, 1, 1000); camera.position.set(13, 25, 38); camera.lookAt(scene.position); var renderer = new THREE.WebGLRenderer({ antialias: true }); var canvas =

I'm not entirely clear on the scope of enabling vertex attrib arrays. I've got several different shader programs with differing numbers of vertex attributes. Are glEnableVertexAttribArray calls local to a shader program, or global? Right now I'm enabling vertex attrib arrays when I create the shader program, and never disabling them, and all seems to work, but it seems like I'm possibly supposed to enable/disable them right before/after draw calls. Is there an impact to this? (I'm in WebGL, as it happens, so we're really talking about gl.enableVertexAttribArray and gl.disableVertexAttribArray

in this code i want to draw a simple triangle on a blue background using openGL however when i compile and run the code only a window with the blue background appears (without the white triangle that is supposed to be drawn), iam using Xcode my code #include <iostream> #include <string> #include <GLUT/glut.h> #include <OpenGL/gl3.h> #include <fstream> using namespace std; // VAO & VBO objects GLuint VBO; GLuint VAO; void display(); // vertex Data (position) float vertex[] = {-1.0, 0.0 , 1.0, 0.0, 1.0 , 0.0, 0.0, 0.0 , 0.0 }; GLuint Program; GLuint Vshader; GLuint Fshader; // main program int

This question has been asked before but the quite a few years ago in my searches. The answer was always to use texture mapping but what I really want to do is represent the star as a single vertex - you may think I'm copping out with a simplistic method but in fact, a single point source of light actually looks pretty good and realistic. But I want to process that point of light with something like a gaussian blur too give it a little more body when zooming in or for brighter stars. I was going to texture map a gaussian blur image but if I understand things correctly I would then have to draw