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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。/ C; P9 n4 |( T9 O( p
- importPackage (java.lang);# E# @ c# k; V, c# W9 S
- importPackage (java.awt);* g& B; U2 h: \, N" G: f
- 8 i4 c1 z9 t; o6 g& _/ Z
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);$ P1 P/ U) x; h# D4 ~3 y4 p
1 v* m0 t( R H$ @1 H- function getW(str, font) {8 P+ J! t7 k+ y8 z% ~* T
- let frc = Resources.getFontRenderContext();( ~; R7 d$ R* q& T7 A% c
- bounds = font.getStringBounds(str, frc);- v2 ~2 W9 d! M# J V9 |/ H
- return Math.ceil(bounds.getWidth());" ?, @3 T- U' j" U- ~) r0 l) y& c2 C1 S
- }9 |) R5 v% c) U/ {( `) s. V! X
- + |& O& A3 K& [$ ~/ W
- da = (g) => {//底图绘制% }/ c5 M: m2 F& X
- g.setColor(Color.BLACK);0 m X: v; r3 k1 t4 i
- g.fillRect(0, 0, 400, 400);
/ ~# Z: s! g- q$ u l1 ?" V0 H - }
4 F; h! f% b R w
n3 b/ T1 _! m) c- \9 V. q- db = (g) => {//上层绘制
& a Y/ q( F& Q- R! a( I) } - g.setColor(Color.WHITE);' a' G( I- \7 E' J
- g.fillRect(0, 0, 400, 400);
/ D5 s4 ^! H5 P3 J - g.setColor(Color.RED);
5 X$ a# O1 E" f" z* F% P+ z - g.setFont(font0);
2 J5 Y- i, F& G# U$ R4 g - let str = "晴纱是男娘";
Y# w2 f$ e* p% R/ h2 ?7 \3 w- B - let ww = 400;3 K# A6 h+ n( }4 d+ n
- let w = getW(str, font0);
) k4 `. Z% u* S& _4 c, \: { - g.drawString(str, ww / 2 - w / 2, 200);! W. N/ h; u- N5 c1 @3 r) c
- }, Z6 e/ {$ a7 A" M% K1 P3 k/ `
- : s; N+ h! q% x- C S
- const mat = new Matrices();
' T% m6 g1 ^' n( D9 ?( [ - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
8 X4 @: H# j6 A0 S4 D9 A - let info = {
w! \1 S3 v; c - ctx: ctx,
% y8 }0 |# H$ E7 P, @( G - isTrain: false,6 g3 [1 X3 p( A/ ]! g/ m
- matrices: [mat],
4 d2 Q3 p* X& K- C% e0 ^ - texture: [400, 400],6 K, {1 i9 n* C, A5 j
- model: {; v- F" G( d" Z1 |9 o1 w
- renderType: "light",
9 s. C( T0 U7 J) S1 x1 G3 k) s - size: [1, 1],
6 p- J! ~% o! ^: G/ \: | - uvSize: [1, 1]' F3 [" y ~% T
- } ?8 t; S; h$ Q i+ s: e& C$ i
- }% \# z Q* K9 d! N+ U K) D: z
- let f = new Face(info);
5 b; {" F6 t8 J. x0 d. w - state.f = f;
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' `% X8 I) `' i7 M" R/ m$ _! H! I- l- let t = f.texture;
% a5 O: i( I. o: t - let g = t.graphics;1 {. Y7 [- Y4 h. t6 P7 O* a
- state.running = true;- ~, `& j7 R' U6 I' S( R& m
- let fps = 24;
$ P% @$ I8 r; F* u- Y, I* {- c2 A - da(g);//绘制底图
! v) l8 d5 C+ ?1 u% K1 Y% T$ b - t.upload();
# c* p7 R7 |! U- a% W - let k = 0;
4 `" h) @8 U. z e/ n t# m3 [! ^ - let ti = Date.now();
2 ]5 e5 D2 R# `7 u1 u3 ?. ? - let rt = 0;1 i" e) ^# F: S3 t( Y K8 h
- smooth = (k, v) => {// 平滑变化- `+ y" V( r2 F7 }' x3 j: I3 f" P1 x
- if (v > k) return k; W# `: C% A6 s, S, F. z, H: J
- if (k < 0) return 0;
! a* p- r1 U1 S* _ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& @% R8 ~3 k2 ?# M! M4 L/ p. Q. T/ p - }1 V% }# X: X4 K% l' j
- run = () => {// 新线程
9 ] ^! g1 G$ h3 ?2 l; }3 V) A - let id = Thread.currentThread().getId();" w' @! F: P. Y9 q& ?
- print("Thread start:" + id);
+ m+ ]# P9 N3 \ - while (state.running) {
. p& B. ~* T( z6 T6 e - try {
% f6 Y* `/ x4 d7 W/ X& M - k += (Date.now() - ti) / 1000 * 0.2;4 O- O( O3 ?3 z9 S
- ti = Date.now();& v# ? }8 W* Y- T S8 ^. |
- if (k > 1.5) {
5 s2 f! `/ i' G" P" K* g - k = 0;1 u1 m9 [4 k7 |! a8 p) u1 _& h* `
- }9 q% C; V" H4 \6 q
- setComp(g, 1);) x# u! G1 t: C! s+ t
- da(g);
. ?/ D9 X! P: N H0 \ - let kk = smooth(1, k);//平滑切换透明度
/ d: E% h1 O0 | - setComp(g, kk);
6 P% {: i$ I) v1 w% D! z - db(g);* n. X' i l+ Q" x2 D* L7 u
- t.upload();
' a ? Q" F% v1 _$ U: c - ctx.setDebugInfo("rt" ,Date.now() - ti);: I$ d3 q2 t# g. E2 E* f
- ctx.setDebugInfo("k", k);; e( q( {5 V5 Q2 Z$ Q
- ctx.setDebugInfo("sm", kk);5 t- x6 O" D' r& t; O; U2 n
- rt = Date.now() - ti;4 f2 o9 U$ B: B/ E( |
- Thread.sleep(ck(rt - 1000 / fps));
+ N u8 w. ]) {" G L - ctx.setDebugInfo("error", 0)
1 ~5 g. k( g" z8 \ - } catch (e) {
% G1 a! N* J% L& c* O& a5 e - ctx.setDebugInfo("error", e);% F) u1 Z' V8 ~: [6 S
- }
+ c0 b2 o7 _$ Y) `7 T - }
$ R7 M( }6 Y" k3 R1 s/ R# N - print("Thread end:" + id);& c$ z. {: ]& D% k, A
- }% [" i& N5 f9 g# a/ ?$ `
- let th = new Thread(run, "qiehuan");
: a. K1 q- m: [* Z: y. c - th.start();$ h) T1 N! z/ e
- }
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- function render(ctx, state, entity) {3 S5 u- d* P* m& ^* U4 ~
- state.f.tick();
# F" c* _* n6 { - }
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- function dispose(ctx, state, entity) {
% y E w6 B6 x% R* q1 h) Z$ w - print("Dispose");
; N' L+ ^8 l4 T. [: Q - state.running = false;* D) O! w* a R" t5 O8 {5 ~6 V
- state.f.close();
2 s" t. `. {) } - }7 A/ z9 I5 {/ _5 h6 T; j. c
- & ?, d- e2 G) H4 Q) n' P( N
- function setComp(g, value) {0 g9 V/ |+ b* K6 p7 }
- g.setComposite(AlphaComposite.SrcOver.derive(value));
8 D' X0 M1 c4 Q( _4 S - }
复制代码 8 J! j" p7 f- ?! B9 e& x! B& ?9 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。, F j1 c/ Y/ y' p
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/ `/ \. F9 [; N- X) M0 q顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)- ^2 {# k4 ^4 ~' V! C l9 _
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