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Code Issues Releases Wiki Activity

webgl2 support

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Pavel Dobryakov
2017-08-23 12:25:52 +03:00
parent bb317ba681
commit 1f277bb778
1 changed files with 17 additions and 7 deletions
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24
script.js
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@@ -2,12 +2,19 @@
const canvas = document.getElementsByTagName('canvas')[0];
const params = { alpha: false, preserveDrawingBuffer: false, depth: false, stencil: false, antialias: false };
const gl = canvas.getContext('webgl', params) || canvas.getContext('experimental-webgl', params);
let gl = canvas.getContext('webgl2');
const isWebGL2 = !!gl;
if (!isWebGL2) {
gl = canvas.getContext('webgl', params) || canvas.getContext('experimental-webgl', params);
}
gl.clearColor(0.0, 0.0, 0.0, 1.0);
const halfFloat = gl.getExtension('OES_texture_half_float');
const support_linear_float = gl.getExtension('OES_texture_half_float_linear');
if (isWebGL2) {
gl.getExtension('EXT_color_buffer_float');
}
resizeCanvas();
@@ -325,7 +332,7 @@ function createFBO (texId, width, height, format, type, param) {
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, param);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
gl.texImage2D(gl.TEXTURE_2D, 0, format, width, height, 0, format, type, null);
gl.texImage2D(gl.TEXTURE_2D, 0, format, width, height, 0, gl.RGBA, type, null);
let fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
@@ -355,11 +362,14 @@ function createDoubleFBO (texId, width, height, format, type, param) {
}
}
let density = createDoubleFBO(0, TEXTURE_WIDTH, TEXTURE_HEIGHT, gl.RGBA, halfFloat.HALF_FLOAT_OES, support_linear_float ? gl.LINEAR : gl.NEAREST);
let velocity = createDoubleFBO(2, TEXTURE_WIDTH, TEXTURE_HEIGHT, gl.RGBA, halfFloat.HALF_FLOAT_OES, support_linear_float ? gl.LINEAR : gl.NEAREST);
let divergence = createFBO (4, TEXTURE_WIDTH, TEXTURE_HEIGHT, gl.RGBA, halfFloat.HALF_FLOAT_OES, gl.NEAREST);
let curl = createFBO (5, TEXTURE_WIDTH, TEXTURE_HEIGHT, gl.RGBA, halfFloat.HALF_FLOAT_OES, gl.NEAREST);
let pressure = createDoubleFBO(6, TEXTURE_WIDTH, TEXTURE_HEIGHT, gl.RGBA, halfFloat.HALF_FLOAT_OES, gl.NEAREST);
const internalFormat = isWebGL2 ? gl.RGBA16F : gl.RGBA;
const texType = isWebGL2 ? gl.HALF_FLOAT : halfFloat.HALF_FLOAT_OES;
let density = createDoubleFBO(0, TEXTURE_WIDTH, TEXTURE_HEIGHT, internalFormat, texType, support_linear_float ? gl.LINEAR : gl.NEAREST);
let velocity = createDoubleFBO(2, TEXTURE_WIDTH, TEXTURE_HEIGHT, internalFormat, texType, support_linear_float ? gl.LINEAR : gl.NEAREST);
let divergence = createFBO (4, TEXTURE_WIDTH, TEXTURE_HEIGHT, internalFormat, texType, gl.NEAREST);
let curl = createFBO (5, TEXTURE_WIDTH, TEXTURE_HEIGHT, internalFormat, texType, gl.NEAREST);
let pressure = createDoubleFBO(6, TEXTURE_WIDTH, TEXTURE_HEIGHT, internalFormat, texType, gl.NEAREST);
const displayProgram = new GLProgram(baseVertexShader, displayShader);
const splatProgram = new GLProgram(baseVertexShader, splatShader);