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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。
l$ Q' @( T6 \- |- T- importPackage (java.lang);
9 h, k7 v' T" O# X9 N' ? - importPackage (java.awt);% q- F" v6 j0 L' c0 L+ m2 t {; G
* h7 u6 f. @. [3 v' F _& D! T( {" m# Q- include(Resources.id("mtrsteamloco:library/code/face.js"));
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q" s/ v {) @- G' X- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( R) R! X; n5 U7 F
- ) k: v% ^( ]9 c; X9 W
- function getW(str, font) {( U; V0 @2 b6 P: J6 |( g# V
- let frc = Resources.getFontRenderContext();
5 _) q+ z3 [. x - bounds = font.getStringBounds(str, frc);3 M; y+ |. Y* J7 X/ k
- return Math.ceil(bounds.getWidth());
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( v4 x" F0 v1 g' k/ V- da = (g) => {//底图绘制- z8 r; W) q9 I4 M- y) t$ G
- g.setColor(Color.BLACK);
W- f, y, W. H6 F0 V - g.fillRect(0, 0, 400, 400);( E q. Z: `6 r( y, r* m9 d3 V' l
- }
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- db = (g) => {//上层绘制* q' n7 U* T6 b0 b0 n
- g.setColor(Color.WHITE);
C" N, V, D9 l* g - g.fillRect(0, 0, 400, 400);; b, g, v. ~1 _1 n) f# Q# g% ^
- g.setColor(Color.RED);) X' h' Y% d( O' @' A
- g.setFont(font0);6 n& t! q! i% C; ?) g' B& M
- let str = "晴纱是男娘";
: [0 A& a7 k7 o5 Z: q* B& O - let ww = 400;
& L- v6 x% ?* T - let w = getW(str, font0);* I0 T8 l" M9 W& M( p1 \+ I
- g.drawString(str, ww / 2 - w / 2, 200);% N" E% ?9 A' S) l8 D; n% U* e
- }
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, C0 A; }+ N. G5 o- const mat = new Matrices();! K) ^) m( A/ N! B1 B. o
- mat.translate(0, 0.5, 0);
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+ i# T8 u* X8 R1 {5 U: @! |: _3 x- function create(ctx, state, entity) {
! `& B j# d F0 V8 H: f2 U - let info = {- H9 g$ r5 a; t4 `; C5 b" p
- ctx: ctx,1 c8 {2 G* S" C6 H3 j, I9 k
- isTrain: false,
' t r# R- [6 w2 Y# r+ w/ b$ p7 n - matrices: [mat],
0 l C* O+ ~7 D" B/ ]0 j, ? - texture: [400, 400], S4 Q! w" W& u& ]# G; R
- model: {* ^' ~' x' \/ c- [
- renderType: "light",9 m% c& |& \) u4 O1 d6 C- I6 E
- size: [1, 1]," P# t6 d, `) A* B/ }% O
- uvSize: [1, 1]3 p/ L' g7 R5 A/ w& q, c
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- }7 W' ~" h. s* X) G. \/ l9 y
- let f = new Face(info);( y3 h; k1 ?1 U$ }( `: ` E9 r
- state.f = f;
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- let t = f.texture;7 O) |% c% p2 w; Q6 y5 w
- let g = t.graphics;- x3 b# M5 ]& G# u T% R
- state.running = true;
' s" `" i) X8 d! Y/ w O - let fps = 24;& R9 i$ L0 x' f: P$ O# x( @! L3 ]
- da(g);//绘制底图 U- q: e. r' G( i" l; Q: U7 x
- t.upload();
B9 F9 s& J" f# o - let k = 0;
4 A$ v; t! X# F0 t0 L - let ti = Date.now();2 U, m3 C! g, \( H8 @/ z5 o1 e
- let rt = 0;) C7 q3 W, ]/ P! |7 r& A( P) O
- smooth = (k, v) => {// 平滑变化/ [# w, P$ O6 G3 w7 y
- if (v > k) return k;
8 v3 k+ ?0 u6 B9 o1 | - if (k < 0) return 0;- d9 W2 M9 D; S! ~0 n* b, c6 ^- d
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 F/ m/ P+ G& Q
- }: V) u' p& A. p/ p% o- F6 k
- run = () => {// 新线程
8 o( S8 \' H" f - let id = Thread.currentThread().getId();
+ |7 [0 l" V7 Y' i - print("Thread start:" + id);
& {9 P* D' \& c+ o" K$ b7 P - while (state.running) {2 D1 p+ M- t% \
- try {
@* S: G' ]: j1 c4 n" y( D' M% a/ I - k += (Date.now() - ti) / 1000 * 0.2;
; W$ k6 e) G ] - ti = Date.now();
* T' X. G2 c- I5 ] - if (k > 1.5) {
& _& M# p, O5 k1 p9 z - k = 0;- r- Y K6 q; `2 N/ X0 V' p
- }* ]" {: w/ H! D6 R
- setComp(g, 1);
6 q2 O/ [* v/ i* {9 N9 ] - da(g);
7 {- J5 g j! T5 ]2 u7 K8 w - let kk = smooth(1, k);//平滑切换透明度
6 C* c; _8 f, {2 j - setComp(g, kk);
1 i5 y& K: J/ \& l6 u. o, X2 D - db(g);
Y2 i6 o0 ~9 |: \& A' S& E - t.upload();7 B: D& C- z& \
- ctx.setDebugInfo("rt" ,Date.now() - ti);
- v% P9 M6 w* D$ ]; \, O. C2 _+ h - ctx.setDebugInfo("k", k);; _ ]' g7 a, o; n5 Z6 W
- ctx.setDebugInfo("sm", kk); s, l' O7 t% z( Q3 L5 a
- rt = Date.now() - ti;
4 y& T9 q5 e c4 S! b! D/ g: Y- Q - Thread.sleep(ck(rt - 1000 / fps));3 ~6 H1 R$ s D( X1 ?4 ]. |
- ctx.setDebugInfo("error", 0)* {% s% F0 \& G/ Z0 U' ^
- } catch (e) {
0 F' a9 ]3 c" p" f& \* ] - ctx.setDebugInfo("error", e);* Q5 Q( y6 v& n6 ^
- }5 m8 S2 c: Z$ p- ]
- }6 @% z% i! R# I! i4 r6 _
- print("Thread end:" + id);
) Y5 x9 D5 U/ } i- p( M5 C' K+ b - }
" e# I( U0 F# T+ }# ] - let th = new Thread(run, "qiehuan");" M. p5 L% }9 ~
- th.start();
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- ! _" P2 b- i5 B4 U/ `. t9 r6 O! |8 R
- function render(ctx, state, entity) {
) r( x s z- O( }( R - state.f.tick();& g; C3 Y- H$ G! g
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- function dispose(ctx, state, entity) {1 }8 b) j% |' j# _% c/ |! q0 B
- print("Dispose");
+ V% U& m2 y( d, j, b' u8 t# | - state.running = false;' Q+ l) a' l# H6 s+ X" e; v: z
- state.f.close();
* ?7 ^1 h# E$ `3 E* g/ U/ ^3 ~ - }
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% m& N% Y7 Z/ l X, B' W- function setComp(g, value) {/ E; [) F/ C) V
- g.setComposite(AlphaComposite.SrcOver.derive(value));& \ C/ w$ j& l
- }
复制代码
1 _, o7 W' d7 M+ I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。* m7 V, J4 d. I/ E" M
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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)% x' z2 @; f9 ^( |# I; u7 T
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