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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。2 Q: I* E# V( N' k
- importPackage (java.lang);9 V8 m6 o1 l6 @9 r8 H- Z. T& o
- importPackage (java.awt);
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& P$ v7 o; E$ j# C/ f- include(Resources.id("mtrsteamloco:library/code/face.js"));& G% c/ n2 P, |& e. u! E
- ! I; V$ a w; ]- }) v! Z; O6 P7 \
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); x5 d; y1 T" S0 Z
- 6 B9 w' b& [2 @/ \ B8 w8 l
- function getW(str, font) {7 K9 c |8 ~ \$ M
- let frc = Resources.getFontRenderContext();
( m E+ p% e* }0 O. { - bounds = font.getStringBounds(str, frc);
1 Z" D+ e1 o+ g! m - return Math.ceil(bounds.getWidth());
% Y5 C' J" D8 I: U4 R r' b0 z - }
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- da = (g) => {//底图绘制* j a% [9 |7 U' ~
- g.setColor(Color.BLACK);
L4 R7 t& N/ _/ Z - g.fillRect(0, 0, 400, 400);
. B9 b5 n2 R* M- O - }
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- db = (g) => {//上层绘制/ i% I7 ?' L% D: O# a M' t6 @
- g.setColor(Color.WHITE);
& Z# X6 B, m K% H! I4 u - g.fillRect(0, 0, 400, 400);% d, Q' C+ d0 ]
- g.setColor(Color.RED);8 |4 ^" p0 ~* J. D, s+ N* u
- g.setFont(font0);
3 e' N" i. z0 h5 R2 ?' `5 M - let str = "晴纱是男娘";
2 t; F( P0 m! u - let ww = 400;4 T0 D# c1 w6 g; O9 {7 j8 I
- let w = getW(str, font0);% A7 ?) N" ^" |3 N
- g.drawString(str, ww / 2 - w / 2, 200);
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; Z: F! e( p& V- const mat = new Matrices();+ y* V! T1 V& v9 J4 X! |" B# F& X
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
# U6 I' W" \+ I3 u1 w$ p - let info = {- J4 ]/ W' l( n; L
- ctx: ctx,4 J$ C8 U7 f$ V
- isTrain: false,' T* k3 Z, l& T6 W; k( J. e( k
- matrices: [mat],- A: j+ X1 P2 B$ F/ N- x2 ?
- texture: [400, 400],
W- u9 c! p) Q - model: {
8 K8 }% d5 L+ l - renderType: "light",
& B( i2 {/ Q" K - size: [1, 1],$ S6 ]! p7 W1 a
- uvSize: [1, 1]: R+ o" Z& o7 @* r
- }; k) _! n* `& ~7 Y6 [# u& _4 z
- }) I: [6 S9 B7 d6 m1 a4 @
- let f = new Face(info);1 T* b% j- a, E! W& k
- state.f = f;
- n* B& ~+ T# W( d' ^7 {
2 ~0 t# l* Z6 Z4 p- let t = f.texture;
* l2 k: t$ ?* B - let g = t.graphics;
! P3 ]( j' J, u5 V8 g - state.running = true;5 H+ P4 C0 N3 r. ^; @4 R" Q
- let fps = 24;
# q4 e: j# _1 g& W5 R9 n - da(g);//绘制底图0 X- f" \( e6 N* {0 C; g' t
- t.upload();
" w* @ L% U- R- I, Y& C) ]' a - let k = 0;- I* [9 O. W: |! a9 p3 f" [/ ^
- let ti = Date.now();
1 J- N# n5 i% d# ? - let rt = 0;
9 \9 J7 y& G3 D5 ?2 x% E( G* e - smooth = (k, v) => {// 平滑变化, L+ W& ^$ f3 M" l6 j, c( a6 H8 Y _
- if (v > k) return k;
7 }% Y0 _3 S! @1 v7 J - if (k < 0) return 0;
o) {" W7 @) q7 f$ z" u5 d - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. _7 u- _0 S( ~
- }- v, u2 n+ Y# t3 J2 W7 j' D' F; z
- run = () => {// 新线程
6 F7 y2 V1 f- U& d I - let id = Thread.currentThread().getId();
J! b) K& P) M. \6 A) E. [( [ - print("Thread start:" + id);! z( J2 p: g! y8 _
- while (state.running) {
; x2 F) Q1 b( t; T - try {
% e6 U; h( @+ D( Q$ m/ p6 Y - k += (Date.now() - ti) / 1000 * 0.2;
% S2 J2 R2 E8 D* N- Z - ti = Date.now();
! y/ ?! r8 M' N1 ]4 H, ^) j3 w - if (k > 1.5) {0 }5 r# e) g! E' c7 O! f0 @5 q
- k = 0;0 U3 w3 R/ O4 O; n; p& ]
- }/ {/ I( q6 ?/ Y& M2 O
- setComp(g, 1);; R. d; Q# W0 T* q% g! O/ d
- da(g);& B$ \6 Y p7 b3 z: a( G# p* q( p. y
- let kk = smooth(1, k);//平滑切换透明度' G/ I" H: i0 S9 e; W
- setComp(g, kk);5 w- P5 I+ i k- @3 d
- db(g);
, f! x1 A) Y3 ?- f. o. O - t.upload();8 y4 i# l8 \/ T$ X" g7 Z! Z
- ctx.setDebugInfo("rt" ,Date.now() - ti);
& M, T# Q) S' _* P: V - ctx.setDebugInfo("k", k);7 `: y; v# u! \1 ~
- ctx.setDebugInfo("sm", kk);
! l- m# R- D6 y" ^2 f0 ? - rt = Date.now() - ti;
% S6 S! F: B) {: f, q3 y9 u* L6 G - Thread.sleep(ck(rt - 1000 / fps));, A) d1 r7 `% X% k" O2 W
- ctx.setDebugInfo("error", 0)/ O# f7 H8 L8 h& p7 v: }7 Y1 U
- } catch (e) { Z) _3 a' H. I) Q0 g6 O
- ctx.setDebugInfo("error", e);3 s U5 }7 Z, |6 N
- }2 m$ x, x2 ^0 @( j$ W0 ]
- }
2 Z$ [7 g/ Z% m - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");& R- W( ?+ e% r, L
- th.start();2 m1 b \) \: G8 w$ V7 D
- }
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# B1 z" g3 u1 I/ S; Y- U- function render(ctx, state, entity) {
1 `1 q# w% w* A' O/ e6 c l6 W - state.f.tick();9 y0 X+ a4 {# X9 d* v
- }7 y! O* {: S9 c. }1 v9 A
- % P/ F8 ]4 c: r. @, J( Y
- function dispose(ctx, state, entity) {
. h7 m. b8 Y" ^, p - print("Dispose");! P2 V& q% Q' F8 [6 A
- state.running = false;# R5 l" ]) ^2 Z4 _ t
- state.f.close();
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+ _6 s5 Z0 V& x, T' ?& ~7 J9 r/ v! Q- function setComp(g, value) {) N s* R. ]9 H; S5 m) Q
- g.setComposite(AlphaComposite.SrcOver.derive(value));
7 B, \2 d3 K. j4 r9 s" k - }
复制代码
! t" e5 ]; [9 e2 T. Y7 ~# _. s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)! {3 L. z8 I8 f
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