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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。
5 l7 ], T) `+ [- importPackage (java.lang);
( B; k3 u; b8 q; ]; l* O - importPackage (java.awt);* a- G8 i H8 C$ j$ j' |
- " M$ T u! S, c3 `1 V9 M: U/ s* }0 s
- include(Resources.id("mtrsteamloco:library/code/face.js"));$ n# D; q7 r8 t- y+ O2 q
* d: {8 p/ E9 g- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 O3 B8 }/ r* A
- 7 _3 D$ n% c( V: k
- function getW(str, font) {4 k' v* B2 e$ o: }, q
- let frc = Resources.getFontRenderContext();' Q9 ^2 i! r/ R/ D4 \
- bounds = font.getStringBounds(str, frc);
; Q" Y3 S7 i' |" B: v8 A5 g - return Math.ceil(bounds.getWidth());
) x1 d9 i8 w/ U1 H4 E/ r, y - }
1 |# `6 q: y. z
! e5 w) E+ [5 J b- da = (g) => {//底图绘制, X* l; X; s7 |* F* @. ?4 x
- g.setColor(Color.BLACK);
' b& W* h! I! V/ b - g.fillRect(0, 0, 400, 400);
w: A/ ]0 Y# S7 \# |4 t - }. [1 g9 ^3 b' n. Y$ `5 b
b l* o) N! P# e' g2 \% j% t" d- db = (g) => {//上层绘制& \7 Z$ S9 N3 t8 h; i6 K
- g.setColor(Color.WHITE);- G7 a1 J( u% G
- g.fillRect(0, 0, 400, 400);( g# r# K: O1 G R! W7 R2 \
- g.setColor(Color.RED);
# T" i; u# S9 {3 _6 F - g.setFont(font0);
, H( G/ f/ a+ {2 ^" g# u - let str = "晴纱是男娘";
8 t V: E' H7 a3 W4 V, | - let ww = 400;
+ _3 V' I9 s8 G3 U# L - let w = getW(str, font0);% l9 w4 u- }# T7 u2 S5 _
- g.drawString(str, ww / 2 - w / 2, 200);
( p E0 L6 w/ G8 H - }7 L. R" @$ v; [$ o! w- y
- , }0 |" j' }8 {# _2 `* Z9 x8 B/ h
- const mat = new Matrices();
; K/ u P9 S& _ - mat.translate(0, 0.5, 0);4 k J$ i" L$ x$ o! t) Y
9 d# s" R+ [9 P+ i# a- function create(ctx, state, entity) {
* x V v0 E# w" _+ y1 u4 D - let info = {
( N- N* K( }% b' F0 r# Z - ctx: ctx,( N, j3 _$ m1 j) [, W- N
- isTrain: false,
6 b, s7 P9 g- a1 R; Z$ F' W& E - matrices: [mat]," Q2 @" j! t" P e' V
- texture: [400, 400],& I/ d ]( a' s
- model: {* `" n, P4 U3 o
- renderType: "light",
! z6 g2 |1 | }: `' J7 g - size: [1, 1], o: w9 ?8 e5 J5 T5 t: C
- uvSize: [1, 1]
# R2 k( k8 e) ]! {# q: T - }7 t4 T8 i$ o' q1 D* J( C: C! ~
- }" } s+ o/ f8 r
- let f = new Face(info);. v% M' S' D2 \' ]5 i! y3 k8 ]* P; S" p
- state.f = f;( ], `/ c$ O( R& e
- $ D. x- q/ Q2 P$ x' y* z2 v2 H. c
- let t = f.texture;
2 T \7 s4 V) A0 f# h" H Y - let g = t.graphics;* m9 u/ @3 Q; O" N( d* J
- state.running = true;
+ Z @; F( s2 T' M1 n - let fps = 24;3 I/ m4 I( |( T& Q/ D
- da(g);//绘制底图. B/ o- ]( h) p- ^
- t.upload();
( F7 |# h! z; N ^ - let k = 0;
' [$ m* W) ]) H% D! M# ?% j* d - let ti = Date.now();3 R1 u, O! L/ j
- let rt = 0;5 o- m3 e+ q3 X1 }
- smooth = (k, v) => {// 平滑变化- @# M5 e1 V, y) h- v
- if (v > k) return k;
9 p: J R7 l5 D6 S5 t* b* R: P - if (k < 0) return 0;
9 l) F& p/ a; [4 f4 L! v) c [ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
/ ]# q( X) R5 _5 C, R) \ - }
1 G- r0 W& n$ k/ n8 K9 U - run = () => {// 新线程' h ~8 r+ C7 L
- let id = Thread.currentThread().getId();9 B# x2 S$ K& \2 B% {1 t
- print("Thread start:" + id);3 s0 \" y. K- j! j! S3 n7 Z% n2 A
- while (state.running) {; k: F' `( A- _: {4 H, h
- try {; c) e" n4 Q% T
- k += (Date.now() - ti) / 1000 * 0.2;6 u+ t6 `+ P' x- A/ N, G3 c0 x4 }9 T
- ti = Date.now();
/ B$ c7 A+ I( x/ _ - if (k > 1.5) {
$ t9 S) H7 }7 A3 s - k = 0;: h9 V8 |" a3 ^0 j( m2 E7 Z3 c7 a
- }: q7 d/ ?1 M/ \ k6 {5 t2 D
- setComp(g, 1);
, ~- J Z7 F" d$ l - da(g);" e2 @' z, l& L6 W
- let kk = smooth(1, k);//平滑切换透明度% \- ?7 d* z& |0 T
- setComp(g, kk);- I0 E, @: ]- C, @1 l
- db(g);; e/ c9 v8 g# t+ y, l
- t.upload();
5 [- x/ L$ {! B+ {' t) A7 @6 X8 | - ctx.setDebugInfo("rt" ,Date.now() - ti);9 Z# Z8 U) x' s2 X
- ctx.setDebugInfo("k", k);
9 @: W9 J8 H# N - ctx.setDebugInfo("sm", kk);# ?5 k7 h+ Q% i
- rt = Date.now() - ti;6 i9 y7 m/ n7 Y( E7 e+ _
- Thread.sleep(ck(rt - 1000 / fps));
* x4 R' y' D! k/ v! ? - ctx.setDebugInfo("error", 0)
7 G; Z! ?: j" S! J - } catch (e) {8 {& i! E* Q# g
- ctx.setDebugInfo("error", e);$ T5 _4 D8 H+ ?' c
- }
% ?! v- e$ I8 Q4 t% h8 o& y+ O - }
9 _5 I- X& s2 P/ b5 G - print("Thread end:" + id);
$ ]8 G+ |" ^8 T" l b& p" a! p) B - }
# p8 n" _/ g. B7 h6 T, R3 ^ C - let th = new Thread(run, "qiehuan");1 j9 z6 e# N! W
- th.start();9 d; U1 ^) ?6 Q! l, X V: r3 D
- }
" I) { F) }+ } ?5 s$ n2 S. h* K - 8 \0 Y, Q- n F* n8 R6 r" I
- function render(ctx, state, entity) {2 C0 S6 L, t9 G5 X' W
- state.f.tick();
0 s7 `$ K/ {! l3 D - }
! U9 @: l3 {# [ s9 d; G1 E
4 `& x" p! M) f+ d! W- e# I- function dispose(ctx, state, entity) {
N) Q6 f* g$ w - print("Dispose");! ]' ^! h* C; {, F# b: E( Q' n
- state.running = false;
7 e" } M7 R) V - state.f.close();8 {) R! s- @! S5 ?& x o/ _1 @
- }/ K9 q* |( G4 j
- & R7 E7 y* f2 |% R: D" t U( v# f$ x
- function setComp(g, value) {( Q) i; T8 L4 A2 n
- g.setComposite(AlphaComposite.SrcOver.derive(value));
( ?6 k# J/ q: ^$ s8 z - }
复制代码
6 I. k; o1 a# P8 H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。
# `6 U% `4 d% `/ _. _) {6 M( {7 [2 D$ [, M
& L+ q3 I' L4 r' I顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)* l) _* J) l9 B2 d2 Q( r6 v9 @. D
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