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这些天想了想怎么给LCD做丝滑的动画,稍微想了想,便有了下面这些代码。
+ Y. R7 y2 }0 [# D r. s- importPackage (java.lang);
' G) r$ n! s4 f - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);& a$ F3 ^2 E' g
- : Y$ l" W, z0 W5 n+ b# s
- function getW(str, font) {
& z# ]" M2 Y' g$ Y3 L3 K - let frc = Resources.getFontRenderContext();- l k. {0 l7 T! a2 F$ v2 d
- bounds = font.getStringBounds(str, frc);$ }6 R A+ N9 ]9 f0 Q- k- T
- return Math.ceil(bounds.getWidth());
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- * I( E2 L7 z9 {2 L0 L& e
- da = (g) => {//底图绘制
# V# h2 z" g/ K) x; N - g.setColor(Color.BLACK);
1 o3 U) V& |' ~: Q& l/ y- \$ ` - g.fillRect(0, 0, 400, 400);
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- 8 \" ^" T1 o* {8 z- |( g2 f
- db = (g) => {//上层绘制
{! N( _& b. v% F - g.setColor(Color.WHITE);) D1 c0 ]" v+ P4 i" W1 h5 n. B5 E
- g.fillRect(0, 0, 400, 400);
4 e* k0 h4 r2 a# k1 _ - g.setColor(Color.RED);: A6 u' Y$ D; w- F5 N
- g.setFont(font0);/ I7 y$ {# U/ F% q
- let str = "晴纱是男娘";6 `1 h9 o) s1 {. O& h6 l* p5 |7 \
- let ww = 400;
( G9 z5 T1 x8 S/ r# S/ ^; j |7 ~ - let w = getW(str, font0);
* o% l0 H: A4 s- ? - g.drawString(str, ww / 2 - w / 2, 200);( Y$ w2 V) d) O* @( y6 M. [
- }; B; k# m# ~+ L9 W! P# M4 F% m9 e
- 9 ]: U7 X/ O0 n: L1 l
- const mat = new Matrices();$ T) n) Z i. m% z7 r$ o
- mat.translate(0, 0.5, 0);
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8 s% O, {2 j( N, T7 ]+ ]% m" f- function create(ctx, state, entity) {4 v" U" D \5 \4 ^/ d2 B
- let info = {
) n& A# @9 @3 @& m9 ] - ctx: ctx,2 H% x. E" }3 \$ G' N* x% `7 y
- isTrain: false,6 B5 I; p# l( h7 I
- matrices: [mat]," h% F0 R! K0 D$ `$ J
- texture: [400, 400],: @9 [& \7 o; p/ `# U) K. o8 k
- model: {
" {8 ?; B6 w9 B P" H i - renderType: "light",
% j" X# Y7 H) y( Y9 d0 P* ?1 i2 m; v6 A - size: [1, 1],
. g$ u$ y: J( k/ t4 _ - uvSize: [1, 1]; X4 n# e# _# q) a! F: Q ^
- } d! p& ~ G$ E; I) }1 M! _7 p
- }/ B. j3 O; N. L& T+ k
- let f = new Face(info);. @5 K4 {2 E8 n* }8 G9 T$ b
- state.f = f;
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- let t = f.texture;6 \& f! y- n! Y! S' [! C3 o- |
- let g = t.graphics;
( D: J% H1 s) O: g' l( @! D - state.running = true;; }4 n7 F# \. H) w) u, A, f$ f) |
- let fps = 24;
- l. M7 K% l* t! s - da(g);//绘制底图
8 t. ^2 X- P& _# m6 {1 A - t.upload();
0 H) G5 J- H! b8 w9 z3 R, z7 z7 Q - let k = 0;
$ N6 m, V; M! N) m9 |4 U# ^ - let ti = Date.now();
; g4 P4 t' X& f5 r, F/ J - let rt = 0;
; v" k: g% n- B' Z, e) F - smooth = (k, v) => {// 平滑变化
4 ?8 }9 M' l) U6 g' I; g F% f - if (v > k) return k;6 q. f$ H$ i$ r8 s/ l4 L8 s# G4 v: o
- if (k < 0) return 0;1 \" j: \' @8 l" u
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: @/ G) v4 J0 C. j H) W9 U
- }
* w& U- C x3 R* s - run = () => {// 新线程$ S7 r8 B, i! M9 W! R$ g; L
- let id = Thread.currentThread().getId();+ f9 N1 M; _5 {
- print("Thread start:" + id);7 u" B! n' f I% A
- while (state.running) {
4 y7 g! F0 n$ r1 y - try {
! f, v! j7 ?9 }7 W - k += (Date.now() - ti) / 1000 * 0.2;
# [% r1 w" { S& {/ I7 I( p7 _ - ti = Date.now();
; I5 W) K* N/ b+ d - if (k > 1.5) {
: y* V3 b( Y7 a: I, b" t - k = 0;* Q7 F7 I/ j1 f
- }7 c& }( S* l% K j9 L
- setComp(g, 1);* B& B* L2 }; |! F( Y+ G" K
- da(g);
( v1 S7 T% s# ^/ R: ` - let kk = smooth(1, k);//平滑切换透明度
, {" N: {; w3 u- [* | - setComp(g, kk);
* f' C3 Q3 w: P6 F+ I - db(g);
+ w! R: `; D0 A/ S$ w7 i s - t.upload();1 N3 [' T* Z3 i) ~# I; Q. ?
- ctx.setDebugInfo("rt" ,Date.now() - ti);
r# d1 l& t; u$ }6 }5 ~+ S, P - ctx.setDebugInfo("k", k);3 [4 Y! Z& n& p4 Q& x2 s- D8 F k
- ctx.setDebugInfo("sm", kk);6 ? h& L) Z6 a
- rt = Date.now() - ti;2 @7 J V8 X) c, v
- Thread.sleep(ck(rt - 1000 / fps));
5 E& D$ Z7 y0 w% Y0 U$ N - ctx.setDebugInfo("error", 0)/ R9 w$ U' I. V. ?& C4 n
- } catch (e) {
2 D- [7 y2 C: B8 D t - ctx.setDebugInfo("error", e);
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- }& {5 s& r, i2 T" l' l# `8 ~! q
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");9 U' X! k; \- N' k" f8 f* L
- th.start();
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/ I6 H! J1 a. A S0 L9 s- function render(ctx, state, entity) {
- e+ m8 N5 L* m f6 v2 l6 m - state.f.tick();6 ~; [. G, }% J) p" q# @/ j4 I
- }
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- function dispose(ctx, state, entity) {
" g5 H4 T8 A2 C! {! x - print("Dispose");
' D+ o6 f+ b% V9 Q8 ?' u - state.running = false;$ m" r" ?! i' s% _& ^
- state.f.close();
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( |0 b4 y4 a4 ?% A0 R+ o3 L$ T- @- function setComp(g, value) {- V$ s' R; n+ h# G0 y
- g.setComposite(AlphaComposite.SrcOver.derive(value));, Q! k, k9 L# P- ^6 Z+ R
- }
复制代码 9 u. Q, p* g6 \! `3 k3 {" Z% ^8 O) Q% k* d
写了这么久的js,我便渐渐发觉使用 render 来写更新内容有局限性,比如说会拉高延迟.....等等(但可能也没什么影响?)。在这里我用新建 Thread (线程) 然后在新的 Thread 里来处理图片更新逻辑,实现丝滑切换。2 e4 D, B' H) M# ]) v; o8 Q+ Y1 G
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. M: J' Y! r& j7 v: E. y顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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