diff options
Diffstat (limited to 'main.js')
| -rw-r--r-- | main.js | 121 |
1 files changed, 64 insertions, 57 deletions
@@ -93,47 +93,68 @@ 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(uv, pos) { +function lensflare(u, v, pos_x, pos_y) { const intensity = 1.5; - // const main = add(uv, mul(pos, -1)); - const uvd = mul(uv, length(uv)); - - // let dist = length(main); dist = Math.pow(dist, .1); - - // const f1 = max(0.01-Math.pow(length(add(uv,mul(pos,1.2))),1.9),.0)*7.0; - - const f2 = Math.max(1.0 / (1.0 + 32.0 * Math.pow(length(add(uvd, mul(pos, 0.8))), 2.0)), .0) * 0.1; - const f22 = Math.max(1.0 / (1.0 + 32.0 * Math.pow(length(add(uvd, mul(pos, 0.85))), 2.0)), .0) * 0.08; - const f23 = Math.max(1.0 / (1.0 + 32.0 * Math.pow(length(add(uvd, mul(pos, 0.9))), 2.0)), .0) * 0.06; - - let uvx = mix(uv, uvd, -0.5); - - const f4 = Math.max(0.01 - Math.pow(length(add(uvx, mul(pos, 0.4))), 2.4), .0) * 6.0; - const f42 = Math.max(0.01 - Math.pow(length(add(uvx, mul(pos, 0.45))), 2.4), .0) * 5.0; - const f43 = Math.max(0.01 - Math.pow(length(add(uvx, mul(pos, 0.5))), 2.4), .0) * 3.0; - - uvx = mix(uv, uvd, -.4); - - const f5 = Math.max(0.01 - Math.pow(length(add(uvx, mul(pos, 0.2))), 5.5), .0) * 2.0; - const f52 = Math.max(0.01 - Math.pow(length(add(uvx, mul(pos, 0.4))), 5.5), .0) * 2.0; - const f53 = Math.max(0.01 - Math.pow(length(add(uvx, mul(pos, 0.6))), 5.5), .0) * 2.0; - - uvx = mix(uv, uvd, -0.5); - - const f6 = Math.max(0.01 - Math.pow(length(add(uvx, mul(pos, -0.3))), 1.6), .0) * 6.0; - const f62 = Math.max(0.01 - Math.pow(length(add(uvx, mul(pos, -0.325))), 1.6), .0) * 3.0; - const f63 = Math.max(0.01 - Math.pow(length(add(uvx, mul(pos, -0.35))), 1.6), .0) * 5.0; - - let c = [ - f2 + f4 + f5 + f6, - f22 + f42 + f52 + f62, - f23 + f43 + f53 + f63 + 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 ]; - - c = mul(c, 1.3).map(e => e - length(uvd) * .05); - - return mul(c, intensity); } function draw(viewport_scale) { @@ -154,16 +175,6 @@ function draw(viewport_scale) { ctx.drawImage(img, 0, 0, canvas.width, canvas.height); ctx.filter = ''; - // for (let y = 0; y < canvas.height; y++) { - // for (let x = 0; x < canvas.width; x++) { - // let uv = [x / canvas.width, y / canvas.height]; - // // uv[0] *= canvas.width / canvas.height; - // // let color = lensflare(uv, [.5,.5]); - // ctx.fillStyle = `rgb(${[...uv,0].map(e => Math.floor(e * 255)).join()})`; - // ctx.fillRect(x,y,1,1); - // } - // } - 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++) { @@ -172,15 +183,11 @@ function draw(viewport_scale) { let u = (x / canvas.width - .5) * canvas.width / canvas.height; let v = y / canvas.height - .5; - // imgdata.data[4*i] = u * 255; - // imgdata.data[4*i+1] = v * 255; - // imgdata.data[4*i+2] = 0 - // imgdata.data[4*i+3] = 255; - - let color = lensflare([u, v], [0.3, 0.3]); - imgdata.data[4 * i] = color[0] * 255; - imgdata.data[4 * i + 1] = color[1] * 255; - imgdata.data[4 * i + 2] = color[2] * 255; + 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); |