shader

来源： https://stackoverflow.com/questions/61291143/control-a-textured-3d-object-opacity-in-qml

来源： https://stackoverflow.com/questions/61291143/control-a-textured-3d-object-opacity-in-qml

来源： https://stackoverflow.com/questions/63892847/how-do-i-adjust-the-my-glsl-code-to-add-additional-light-sources

来源： https://stackoverflow.com/questions/63892847/how-do-i-adjust-the-my-glsl-code-to-add-additional-light-sources

来源： https://stackoverflow.com/questions/60109487/diffuse-lighting-for-a-moving-object

来源： https://stackoverflow.com/questions/60109487/diffuse-lighting-for-a-moving-object

问题 /** * A class creating buffers for a textured box to render it with WebGL */ class RasterTextureBox { /** * Creates all WebGL buffers for the textured box * 6 ------- 7 * / | / | * 3 ------- 2 | * | | | | * | 5 -----|- 4 * | / | / * 0 ------- 1 * looking in negative z axis direction * @param {WebGLContext} gl - The canvas' context * @param {Vector} minPoint - The minimal x,y,z of the box * @param {Vector} maxPoint - The maximal x,y,z of the box */ constructor(gl, minPoint, maxPoint, texture)

问题 I'd like to build a dissolve in effect for a Scenekit game. I've been looking into shader modifiers since they seem to be the most light weight and haven't had any luck in replicating this effect: Is it possible to use shader modifiers to create this effect? How would you go about implementing one? 回答1: You can get pretty close to the intended effect with a fragment shader modifier. The basic approach is as follows: Sample from a noise texture If the noise sample is below a certain threshold

问题 I'd like to build a dissolve in effect for a Scenekit game. I've been looking into shader modifiers since they seem to be the most light weight and haven't had any luck in replicating this effect: Is it possible to use shader modifiers to create this effect? How would you go about implementing one? 回答1: You can get pretty close to the intended effect with a fragment shader modifier. The basic approach is as follows: Sample from a noise texture If the noise sample is below a certain threshold

问题 I'm using a custom shader with cocos2d 3.17 for my macOS app on XCode11 but I have some troubles. myShader.frag #ifdef GL_ES precision lowp float; #endif uniform sampler2D u_texture; varying lowp vec4 v_fragmentColor; uniform mat4 u_rotation; void main() { mat4 t1= mat4(1); mat4 t2= mat4(1); t1[3] = vec4(-0.5,-0.5,1,1); t2[3] = vec4(+0.5,+0.5,1,1); vec2 pos = (t2 * u_rotation * t1 * vec4(gl_PointCoord, 0, 1)).xy; gl_FragColor = v_fragmentColor * texture2D(u_texture, pos); } myShader.vert