speck-renderer/dist/src/shaders/atoms.glsl.js

Browser-based WebGL molecule renderer with the goal of producing figures that are as attractive as they are practical.

"use strict";

Object.defineProperty(exports, "__esModule", {
    value: true
});
var atomsShader = "#version 100\nprecision highp float;\n\nattribute vec3 aImposter;\nattribute vec3 aPosition;\nattribute float aRadius;\nattribute vec3 aColor;\n\nuniform mat4 uView;\nuniform mat4 uProjection;\nuniform mat4 uModel;\nuniform float uAtomScale;\nuniform float uRelativeAtomScale;\nuniform float uAtomShade;\n\nvarying vec3 vColor;\nvarying vec3 vPosition;\nvarying float vRadius;\n\nvoid main() {\n    vRadius = uAtomScale * (1.0 + (aRadius - 1.0) * uRelativeAtomScale);\n    gl_Position = uProjection * uView * uModel * vec4(vRadius * aImposter + aPosition, 1.0);\n    vColor = mix(aColor, vec3(1,1,1), uAtomShade);\n    vPosition = vec3(uModel * vec4(aPosition, 1));\n}\n\n\n// __split__\n\n\n#version 100\n#extension GL_EXT_frag_depth: enable\nprecision highp float;\n\nuniform vec2 uBottomLeft;\nuniform vec2 uTopRight;\nuniform float uRes;\nuniform float uDepth;\nuniform int uMode;\n\nvarying vec3 vPosition;\nvarying float vRadius;\nvarying vec3 vColor;\n\nvec2 res = vec2(uRes, uRes);\n\nfloat raySphereIntersect(vec3 r0, vec3 rd) {\n    float a = dot(rd, rd);\n    vec3 s0_r0 = r0 - vPosition;\n    float b = 2.0 * dot(rd, s0_r0);\n    float c = dot(s0_r0, s0_r0) - (vRadius * vRadius);\n    float disc = b*b - 4.0*a*c;\n    if (disc <= 0.0) {\n        return -1.0;\n    }\n    return (-b - sqrt(disc))/(2.0*a);\n}\n\nvoid main() {\n    vec3 r0 = vec3(uBottomLeft + (gl_FragCoord.xy/res) * (uTopRight - uBottomLeft), 0.0);\n    vec3 rd = vec3(0, 0, -1);\n    float t = raySphereIntersect(r0, rd);\n    if (t < 0.0) {\n        discard;\n    }\n    vec3 coord = r0 + rd * t;\n    vec3 normal = normalize(coord - vPosition);\n    if (uMode == 0) {\n        gl_FragColor = vec4(vColor, 1);\n    } else if (uMode == 1) {\n        gl_FragColor = vec4(normal * 0.5 + 0.5, 1.0);\n    }\n    gl_FragDepthEXT = -coord.z/uDepth;\n}";

exports.default = atomsShader;