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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。7 g; J6 v* m; E/ ^$ S5 F8 x
- importPackage (java.lang);! F. w6 I! Z% ^: J. \" {
- importPackage (java.awt);7 Y! }+ m: B) T T
- & k5 H: m) C O) o+ o) ]
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);- C4 w; q5 L; z. T9 u9 b0 ^* t# ~
- ; ^8 s0 @6 K: e) X# ]$ w
- function getW(str, font) {6 P. c8 E; r% z' l
- let frc = Resources.getFontRenderContext();5 o8 B% }/ v; N# ^) c. b
- bounds = font.getStringBounds(str, frc);/ e* s1 ~' r# M. A
- return Math.ceil(bounds.getWidth());
+ C0 l6 A9 n- ^% ?3 F - }+ y9 `# k) I7 ^+ m! f2 d
; @( {3 |* [+ N, r: n( K- da = (g) => {//底图绘制
7 ]0 x6 i% F/ t2 V" N3 |! g b - g.setColor(Color.BLACK);* z9 F! \; f4 V5 W1 X; c
- g.fillRect(0, 0, 400, 400);
b1 d* w4 n* ]6 ~/ K2 D4 [* E - }
5 a& h# U* r( S! g2 I% J - % a% F$ Q/ y5 ]" w! w. {
- db = (g) => {//上层绘制
. W9 C1 _6 b2 o( M. f# r - g.setColor(Color.WHITE);7 e' ^5 E) ?+ r! f
- g.fillRect(0, 0, 400, 400);
& @ ]( i9 L# T. }6 F# Y - g.setColor(Color.RED);: c& V, L# F" U' t O2 K3 I S
- g.setFont(font0);
& Q; ]9 x- j# I3 I: I$ n( `- |: O - let str = "晴纱是男娘";
; G7 @9 }7 c% Z5 v8 T - let ww = 400;# w) ^+ G ?; l) R* _. E
- let w = getW(str, font0);
, j: ^2 p/ s! T5 y' v U6 ~ - g.drawString(str, ww / 2 - w / 2, 200);+ v/ Z$ p) K9 Q; r7 E- v
- }; F3 m/ Z3 Z7 m) M
% B. h4 {) X- h3 Y- const mat = new Matrices();# D: t# w$ z' o$ z! b" _9 y3 M s
- mat.translate(0, 0.5, 0);+ O; m( s$ t5 y2 d% R
. h/ X0 P: v$ A' G" c- function create(ctx, state, entity) {
* o0 R% O" { x! F2 w - let info = {
/ _0 Y" i6 q9 j# W3 k - ctx: ctx,
. N+ l/ G. U4 X! J# a- t - isTrain: false,: M, ~* v( W0 ~( n
- matrices: [mat],. I1 T9 c; {3 n3 T
- texture: [400, 400],4 E% l& g- i8 g* W% Y# _
- model: {
6 O" I( Y. U+ W: c }3 d6 p - renderType: "light",
) w4 F" s# A/ d - size: [1, 1],
" M6 ^/ n1 w- W1 q( ^+ n - uvSize: [1, 1]
! s N. g" H$ a4 e - }+ C4 J! A9 B' `! y7 m4 J+ x) ?
- }6 }4 I" R' ]5 J/ y/ c
- let f = new Face(info);3 |5 Z! J s6 J$ i& w/ Y7 N
- state.f = f;
* ~4 r3 @; z8 A: f* @ n8 c# H: D
: D7 @" S/ J# `; u& Y. N- let t = f.texture;, t9 ^9 z: _: c
- let g = t.graphics;
% y0 E2 ^- A/ C1 F; j - state.running = true;' O' k( B# v- p# \' q' r/ o
- let fps = 24;
6 h# T- J% L4 u+ g& N% N5 D - da(g);//绘制底图/ {( _( R# U4 ^
- t.upload();* C3 J( N8 x0 O8 b
- let k = 0;5 g4 w: S1 f. Y4 \9 A
- let ti = Date.now();- R; D# U& D K' e. o' \' V
- let rt = 0;* L+ C- h X7 x ]
- smooth = (k, v) => {// 平滑变化- ^% ~ z6 l# _3 N6 C( c ~% X) q
- if (v > k) return k;
! x0 s' G2 B+ G$ b9 B - if (k < 0) return 0;
0 V* b' M5 Z; s- A2 ?1 F9 A9 T/ o - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 ^$ C9 K: i: {: F5 v+ M( ?4 b. x
- }7 V+ p/ R* |0 k! M& b/ [1 o
- run = () => {// 新线程
; I8 `8 U2 R W% t" `/ ~6 |. ` - let id = Thread.currentThread().getId();& ?3 r$ [5 m& O# V1 [7 }, O9 I
- print("Thread start:" + id);6 t: ?4 r- {+ ?. ^* P, s# ?5 m
- while (state.running) {
* `1 L9 W# ^1 Q - try {5 {3 T6 V8 \) i
- k += (Date.now() - ti) / 1000 * 0.2;1 X v1 d1 G2 K. y
- ti = Date.now();2 l* e$ c1 d4 ^1 U
- if (k > 1.5) {
- u6 u7 ?7 k; t+ ?, I8 P; ` - k = 0;
9 M( `% F' U. I4 ~, v; i a - }
" C, P; V3 v8 m( K* T# a9 j3 g9 q - setComp(g, 1);& d# w$ N f: h0 y0 k* O
- da(g);
e( a0 T2 {0 f - let kk = smooth(1, k);//平滑切换透明度
1 R) x% Q; B& Y& ^ - setComp(g, kk);
% @' P, A8 X7 t. l2 B - db(g); r! @: p% }7 v1 e2 {
- t.upload();# E7 I. A3 ~ H& a; Z, a
- ctx.setDebugInfo("rt" ,Date.now() - ti);$ G4 G; t2 b( P) Y# E. S
- ctx.setDebugInfo("k", k);
. X' b3 v M9 o+ |" ` - ctx.setDebugInfo("sm", kk);) _, H" K5 R: E1 Z6 i
- rt = Date.now() - ti;1 ?) r! v4 H' c) i3 m
- Thread.sleep(ck(rt - 1000 / fps));" S9 M8 v/ C3 i) z
- ctx.setDebugInfo("error", 0)
9 l' @: v7 m1 [+ a2 m& X( R - } catch (e) {
6 [( J1 v$ R& d- G# U - ctx.setDebugInfo("error", e);& B' q$ j' x+ V
- }1 @4 n8 Q# y$ _5 e8 F
- }
3 }* v2 f1 H" M) k2 z; |1 X5 e - print("Thread end:" + id);
" ?+ a# w) y u - }
! i9 U, C+ G% L, n - let th = new Thread(run, "qiehuan");
$ v- k1 j+ p7 {; l6 ^% a4 E - th.start();
% n% L8 M- a. k! V- i: m - } y; d4 Q, N2 R1 M7 K
( [% s e$ a" C& t; R9 s( e- function render(ctx, state, entity) {
1 X% {0 L" G) f - state.f.tick();+ d* B7 ~# v- |. U
- }7 n4 n3 V- s+ _$ K
7 {. E' L/ F; k" g J- function dispose(ctx, state, entity) {
& m2 w& _; t0 K - print("Dispose"); B+ B7 q. {0 g- x( l C8 }$ M. [
- state.running = false;7 G: L( q% m. `
- state.f.close();) q U; G1 k( m. h0 P
- }( d& y% }$ |% _5 }* h2 q% b
* j* ?$ X# a: | j/ `- function setComp(g, value) {: b! u0 U, ]3 i$ t
- g.setComposite(AlphaComposite.SrcOver.derive(value));) f- W9 O% H2 N; b) N5 c
- }
复制代码 8 Q$ C& Q+ r. h( w6 X+ l
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)* d5 |1 T/ A q1 ]' n
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