From 97718c9619739078799a89cc2a03f03397e3224d Mon Sep 17 00:00:00 2001 From: Orangerot Date: Sun, 8 Dec 2024 08:37:58 +0100 Subject: fix: moved all shader logic into lensflare function --- main.js | 150 ++++++++++++++++++++++++++-------------------------------------- 1 file changed, 60 insertions(+), 90 deletions(-) (limited to 'main.js') diff --git a/main.js b/main.js index 09f3f13..d1e0684 100644 --- a/main.js +++ b/main.js @@ -80,81 +80,66 @@ function settings_apply(event) { draw(true); } -function length(vec) { - return Math.sqrt(vec.reduce((acc, e) => acc + e * e, 0)) -} -function mul(vec, scalar) { - return vec.map(e => e * scalar); -} -function add(vec_a, vec_b) { - return vec_a.map((e, i) => e + vec_b[i]); -} -function mix(vec_x, vec_y, scalar) { - return add(mul(vec_x, 1 - scalar), mul(vec_y, scalar)); -} - -function len_add_mul(vev_a, vec_b, scalar) { - -} - // https://www.shadertoy.com/view/ldSXWK -function lensflare(u, v, pos_x, pos_y) { - const intensity = 1.5; - const uv_len = Math.sqrt(u * u + v * v); - const uvd_x = u * uv_len; - const uvd_y = v * uv_len; - const uvd_len = Math.sqrt(uvd_x * uvd_x + uvd_y * uvd_y); - - const uvd_pos_x = uvd_x + pos_x; - const uvd_pos_y = uvd_y + pos_y; - let temp = (uvd_pos_x * uvd_pos_x + uvd_pos_y * uvd_pos_y) * .8 * .8 - const f2 = Math.max(1.0 / (1.0 + 32.0 * (temp)), .0) * 0.1; - temp = (uvd_pos_x * uvd_pos_x + uvd_pos_y * uvd_pos_y) * .85 * .85 - const f22 = Math.max(1.0 / (1.0 + 32.0 * (temp)), .0) * 0.08; - temp = (uvd_pos_x * uvd_pos_x + uvd_pos_y * uvd_pos_y) * .9 * .9 - const f23 = Math.max(1.0 / (1.0 + 32.0 * (temp)), .0) * 0.06; - - let uvx_x = u * (1 + 0.5) + uvd_x * 0.5; - let uvx_y = v * (1 + 0.5) + uvd_y * 0.5; - let uvx_pos_x = uvx_x + pos_x; - let uvx_pos_y = uvx_y + pos_y; - - temp = (uvx_pos_x * uvx_pos_x + uvx_pos_y * uvx_pos_y) * .4 * .4 - const f4 = Math.max(0.01 - Math.pow((temp), 1.2), .0) * 6.0; - temp = (uvx_pos_x * uvx_pos_x + uvx_pos_y * uvx_pos_y) * .45 * .45 - const f42 = Math.max(0.01 - Math.pow((temp), 1.2), .0) * 5.0; - temp = (uvx_pos_x * uvx_pos_x + uvx_pos_y * uvx_pos_y) * .5 * .5 - const f43 = Math.max(0.01 - Math.pow((temp), 1.2), .0) * 3.0; - - uvx_x = u * (1 + 0.4) + uvd_x * 0.4; - uvx_y = v * (1 + 0.4) + uvd_y * 0.4; - uvx_pos_x = uvx_x + pos_x; - uvx_pos_y = uvx_y + pos_y; - - temp = (uvx_pos_x * uvx_pos_x + uvx_pos_y * uvx_pos_y) * .2 * .2 - const f5 = Math.max(0.01 - Math.pow((temp), 2.475), .0) * 2.0; - temp = (uvx_pos_x * uvx_pos_x + uvx_pos_y * uvx_pos_y) * .4 * .4 - const f52 = Math.max(0.01 - Math.pow((temp), 2.475), .0) * 2.0; - temp = (uvx_pos_x * uvx_pos_x + uvx_pos_y * uvx_pos_y) * .6 * .6 - const f53 = Math.max(0.01 - Math.pow((temp), 2.75), .0) * 2.0; - - uvx_x = u * (1 + 0.5) + uvd_x * 0.5; - uvx_y = v * (1 + 0.5) + uvd_y * 0.5; - uvx_pos_x = uvx_x - pos_x; - uvx_pos_y = uvx_y - pos_y; - - temp = (uvx_pos_x * uvx_pos_x + uvx_pos_y * uvx_pos_y) * .3 * .3 - const f6 = Math.max(0.01 - Math.pow(temp, 0.8), .0) * 6.0; - temp = (uvx_pos_x * uvx_pos_x + uvx_pos_y * uvx_pos_y) * .325 * .325 - const f62 = Math.max(0.01 - Math.pow(temp, 0.8), .0) * 3.0; - temp = (uvx_pos_x * uvx_pos_x + uvx_pos_y * uvx_pos_y) * .35 * .35 - const f63 = Math.max(0.01 - Math.pow(temp, 0.8), .0) * 5.0; - - return [ - ((f2 + f4 + f5 + f6) * 1.3 - uvd_len * .05) * intensity, - ((f22 + f42 + f52 + f62) * 1.3 - uvd_len * .05) * intensity, - ((f23 + f43 + f53 + f63) * 1.3 - uvd_len * .05) * intensity - ]; +function lensflare(pos_x, pos_y) { + const imgdata = ctx.getImageData(0, 0, canvas.width, canvas.height); + const pixel_count = imgdata.data.length / 4; + const aspect_ratio = canvas.width / canvas.height; + for (let i = 0; i < pixel_count; i++) { + const x = i % canvas.width; + const y = i / canvas.width; + const u = (x / canvas.width - .5) * aspect_ratio; + const v = y / canvas.height - .5; + + const intensity = 1.5; + const uv_len = Math.sqrt(u * u + v * v); + const uvd_x = u * uv_len; + const uvd_y = v * uv_len; + const uvd_len = Math.sqrt(uvd_x * uvd_x + uvd_y * uvd_y); + + const uvd_pos_x = uvd_x + pos_x; + const uvd_pos_y = uvd_y + pos_y; + let temp = uvd_pos_x * uvd_pos_x + uvd_pos_y * uvd_pos_y + const f2 = Math.max(1.0 / (1.0 + 32.0 * (temp * .64)), .0) * 0.1; + const f22 = Math.max(1.0 / (1.0 + 32.0 * (temp * .72)), .0) * 0.08; + const f23 = Math.max(1.0 / (1.0 + 32.0 * (temp * .81)), .0) * 0.06; + + let uvx_x = u * (1 + 0.5) + uvd_x * 0.5; + let uvx_y = v * (1 + 0.5) + uvd_y * 0.5; + let uvx_pos_x = uvx_x + pos_x; + let uvx_pos_y = uvx_y + pos_y; + + temp = uvx_pos_x * uvx_pos_x + uvx_pos_y * uvx_pos_y + const f4 = Math.max(0.01 - Math.pow((temp * .16), 1.2), .0) * 6.0; + const f42 = Math.max(0.01 - Math.pow((temp * .2025), 1.2), .0) * 5.0; + const f43 = Math.max(0.01 - Math.pow((temp * .25), 1.2), .0) * 3.0; + + uvx_x = u * (1 + 0.4) + uvd_x * 0.4; + uvx_y = v * (1 + 0.4) + uvd_y * 0.4; + uvx_pos_x = uvx_x + pos_x; + uvx_pos_y = uvx_y + pos_y; + + temp = uvx_pos_x * uvx_pos_x + uvx_pos_y * uvx_pos_y + const f5 = Math.max(0.01 - Math.pow((temp * .04), 2.475), .0) * 2.0; + const f52 = Math.max(0.01 - Math.pow((temp * .16), 2.475), .0) * 2.0; + const f53 = Math.max(0.01 - Math.pow((temp * .36), 2.75), .0) * 2.0; + + uvx_x = u * (1 + 0.5) + uvd_x * 0.5; + uvx_y = v * (1 + 0.5) + uvd_y * 0.5; + uvx_pos_x = uvx_x - pos_x; + uvx_pos_y = uvx_y - pos_y; + + temp = uvx_pos_x * uvx_pos_x + uvx_pos_y * uvx_pos_y + const f6 = Math.max(0.01 - Math.pow(temp * .9, 0.8), .0) * 6.0; + const f62 = Math.max(0.01 - Math.pow(temp * .1, 0.8), .0) * 3.0; + const f63 = Math.max(0.01 - Math.pow(temp * .12, 0.8), .0) * 5.0; + + imgdata.data[4 * i + 0] += 1.2 * ((f2 + f4 + f5 + f6) * 1.3 - uvd_len * .05) * intensity * 255; + imgdata.data[4 * i + 1] += 1.5 * ((f22 + f42 + f52 + f62) * 1.3 - uvd_len * .05) * intensity * 255; + imgdata.data[4 * i + 2] += 1.3 * ((f23 + f43 + f53 + f63) * 1.3 - uvd_len * .05) * intensity * 255; + imgdata.data[4 * i + 3] = 255; + } + ctx.putImageData(imgdata, 0, 0); } function draw(viewport_scale) { @@ -175,22 +160,7 @@ function draw(viewport_scale) { ctx.drawImage(img, 0, 0, canvas.width, canvas.height); ctx.filter = ''; - var imgdata = ctx.getImageData(0, 0, canvas.width, canvas.height); - const pixel_count = imgdata.data.length / 4; - for (let i = 0; i < pixel_count; i++) { - let x = i % canvas.width; - let y = i / canvas.width; - let u = (x / canvas.width - .5) * canvas.width / canvas.height; - let v = y / canvas.height - .5; - - let color = lensflare(u, v, 0.3, 0.3); - const a = (color[0] + color[1] + color[2]) / 3; - imgdata.data[4 * i] += 1.2 * color[0] * 255; - imgdata.data[4 * i + 1] += 1.5 * color[1] * 255; - imgdata.data[4 * i + 2] += 1.3 * color[2] * 255; - imgdata.data[4 * i + 3] = 255; - } - ctx.putImageData(imgdata, 0, 0); + lensflare(.3,.3); } -- cgit v1.2.3