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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。
4 L, T$ Y+ w; @3 K# @- importPackage (java.lang);+ @0 A8 i8 y4 x1 M; c9 w* ^! l6 f
- importPackage (java.awt);+ y; ` ^+ ~4 m
1 n8 T |1 P' n- include(Resources.id("mtrsteamloco:library/code/face.js"));* c0 Q ?2 S0 Z- C C! U* j8 i( @+ m
- 2 S+ N6 x3 x8 h" j
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {# I7 V) P0 {- k5 ?3 V7 c. y
- let frc = Resources.getFontRenderContext();# ~+ M( \7 F4 v$ T3 y V8 O
- bounds = font.getStringBounds(str, frc);3 g8 G8 M$ b( w! ]% r" \$ K
- return Math.ceil(bounds.getWidth());
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- $ Z. U2 t1 `3 S" t
- da = (g) => {//底图绘制
2 b7 p4 d+ u* `% x - g.setColor(Color.BLACK);( @) H* k% e& G; d R
- g.fillRect(0, 0, 400, 400);
4 ?% v% e/ Z5 r- ]- m - }* @" W6 I' s1 d
A: o( M1 |4 _- db = (g) => {//上层绘制
1 D; w: n; l5 ~5 B4 g j' q - g.setColor(Color.WHITE);7 k4 I' O5 |& ^& K5 N
- g.fillRect(0, 0, 400, 400);" a! \ \/ V. b2 V- \7 a! y2 |6 T* P9 Z
- g.setColor(Color.RED);: ? t1 D: n5 ^: S
- g.setFont(font0);
+ `4 [ m" |6 j7 Z1 t6 ] - let str = "晴纱是男娘"; h+ ~+ k$ J# ~; |( Q9 f
- let ww = 400;
& ?" _3 W- o/ E G3 o: {- N - let w = getW(str, font0);- G, F1 l8 M: {" ?
- g.drawString(str, ww / 2 - w / 2, 200);
+ }% e! O# L0 w: R" k, X$ m4 [ - }
6 n3 F+ W" m% c9 D - Q5 D3 }; v$ g
- const mat = new Matrices();
/ s! ~1 U# y1 a4 e# B: | Y# ?$ O - mat.translate(0, 0.5, 0);, m# o- [, K# d9 C8 F
$ j8 }% P' r+ j6 i- function create(ctx, state, entity) {
* G- C' ?1 p6 y9 ` - let info = {
6 m4 S# _. G: N( r - ctx: ctx,
2 V" _5 t1 e. Y4 c - isTrain: false,, [- X5 {8 S+ Z- X) V/ m0 H
- matrices: [mat],
( x# _, x5 Q! K7 p+ _6 n! f - texture: [400, 400],# C& }6 m( z3 X1 R
- model: {% f7 e* I' H" \* @
- renderType: "light",9 I" }& @( G; h
- size: [1, 1],
. D1 m: _: B' z% K - uvSize: [1, 1]; J) _+ c- r3 Y
- }
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- let f = new Face(info);
0 @ ]0 l3 C) v# m* p - state.f = f;3 V$ w0 M4 Y. e) l$ @4 c+ C% c" h
- 7 Z8 Y2 A; R7 D8 `5 X3 w) {
- let t = f.texture;
! Q9 f: j& K: E/ ^ H# n. G: d( B - let g = t.graphics;- u# m: k! }* O; O
- state.running = true;
7 o* I) R. h% J4 _# T, P w6 A - let fps = 24;% b' E# r, h" p& |
- da(g);//绘制底图# L) V- F) |0 p% v c
- t.upload();
' Z4 Y& ?% I( P" q$ q2 `- G - let k = 0;
) m6 d) P9 f! Z1 X, j& P - let ti = Date.now();
, X' v' l" R, m3 c6 v5 p0 I - let rt = 0;
5 h8 k$ }* B" b' a6 ? - smooth = (k, v) => {// 平滑变化8 `% m% n% H( \2 e6 |4 c' l
- if (v > k) return k;
! s& E" a. c* B3 z3 K - if (k < 0) return 0;6 \/ f0 y2 Y1 i
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) P6 |' m) }& y! I8 r- c
- }
& c" v% R, d1 H: V9 j - run = () => {// 新线程' [+ ^& n2 D7 ~, F
- let id = Thread.currentThread().getId();( J% n7 P7 J: G8 p
- print("Thread start:" + id);! S% K- v6 }( s
- while (state.running) { _3 n! s7 f; O9 {
- try {
( H8 \3 o+ V+ d: H4 r! I - k += (Date.now() - ti) / 1000 * 0.2;
& F4 |/ B- x# b6 z - ti = Date.now();
D+ h4 ?8 M6 K* L1 P - if (k > 1.5) {6 Q: `2 s2 {& B+ E
- k = 0;% k8 J# W- K( I, I; s, \
- }* s% \6 C; T( _( x. N
- setComp(g, 1);; k" y' t4 e+ @0 s7 T! V
- da(g);- N5 G2 l; O7 A3 E% L! _
- let kk = smooth(1, k);//平滑切换透明度4 N3 C) E# r! U; K
- setComp(g, kk);
' G a2 b9 E5 y" x' U% U - db(g);0 W$ H0 q: H! B4 z# z
- t.upload();5 r, }! ?1 Z2 X% _
- ctx.setDebugInfo("rt" ,Date.now() - ti);
C; o3 u7 G8 ?0 F2 p7 O- |# P* [ - ctx.setDebugInfo("k", k);
0 X8 O" S9 F6 Q - ctx.setDebugInfo("sm", kk);; }; T4 u7 ^- V3 n6 `
- rt = Date.now() - ti;6 N9 J# y: [: z3 P0 w o% u
- Thread.sleep(ck(rt - 1000 / fps));
# i; c+ q- q* f' R- Z - ctx.setDebugInfo("error", 0)% F* g8 f% U8 N! j& d$ D* @$ V
- } catch (e) {
5 K) Q5 s" M% V* ` - ctx.setDebugInfo("error", e);, S; c3 e* T" i) i2 _ v& \
- }' l8 k1 A. U+ K- W* F' K
- }/ L3 D/ Q: L6 |# p8 }* o3 N
- print("Thread end:" + id);
2 S, q S5 V; i% X# }3 E - }
) ~) m9 B+ y% j2 Y# X - let th = new Thread(run, "qiehuan");8 G( ?% D* E/ o1 e; V$ r6 }. n3 h
- th.start();
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* q5 Y7 w; F' O( F: ?7 n# `+ \1 A- function render(ctx, state, entity) {
0 d9 j- B' E/ I7 R7 @+ i+ K' B - state.f.tick();! p1 L: j! y! B5 N$ W: y
- }
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- function dispose(ctx, state, entity) {
' m+ V$ h3 h" h- A5 M - print("Dispose");# @0 W, b7 M) \& ]4 ]/ n) B6 L
- state.running = false;
6 a) g0 z9 g9 l* I - state.f.close();
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* c l# f2 H0 O% a: m4 M& @- function setComp(g, value) {
( ?, y; C N) P! w; a, W7 i - g.setComposite(AlphaComposite.SrcOver.derive(value));# S2 |& m0 P* L" ]
- }
复制代码 Q/ |& b& \# t
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。
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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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