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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。% v3 {0 F7 G2 c3 I, L
- importPackage (java.lang);
6 I- V& m* B5 @* s6 ^% I% j - importPackage (java.awt);/ w0 `9 M1 ^6 y
! V- G. Q" l- z8 G/ h! E- include(Resources.id("mtrsteamloco:library/code/face.js"));: t3 H0 j$ e3 O
- @- p3 ?% f0 g, M9 F9 `
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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3 j p0 e8 w7 i9 f! Q- function getW(str, font) {6 h# M0 b( J$ v+ @
- let frc = Resources.getFontRenderContext();. @2 j7 H; y% X' ^. [( p1 f
- bounds = font.getStringBounds(str, frc);
! H2 F) d! F3 y/ |" p6 [ - return Math.ceil(bounds.getWidth());
' ?. Z6 N7 Z' J0 B; q* S2 ^ - }
2 ]7 F% g4 P8 w1 P- X2 X
8 \/ s$ j/ x7 l- da = (g) => {//底图绘制% F, T% G W$ [
- g.setColor(Color.BLACK);
- [* H# G( W3 r$ m* m8 B: f! p - g.fillRect(0, 0, 400, 400);/ {& M9 ^. |* \' t, ^
- }) H* J& P( Y9 S2 L; {
- $ v" H" s7 _/ X! C
- db = (g) => {//上层绘制6 H' N7 j4 L% U0 ?: v" n
- g.setColor(Color.WHITE);7 r/ {' U" A. ~0 d% [. ^. l, {/ m
- g.fillRect(0, 0, 400, 400);
" K! ?& F3 Z6 E& b - g.setColor(Color.RED);
6 F. @( n: v" a7 h - g.setFont(font0);
2 t9 a% X, E: r7 | - let str = "晴纱是男娘";
* i4 V* P. [. [& R. D- J" c1 I1 U - let ww = 400;7 S m! `) S. ?
- let w = getW(str, font0);' @$ ^( f/ I# [1 Z
- g.drawString(str, ww / 2 - w / 2, 200);4 @1 n" |! q- S# b" K( h
- }
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. R: ?5 X; d, X+ A" |- const mat = new Matrices();
3 u7 G [4 J. T% {3 _( G6 H - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
0 y0 l9 X, O! L4 N$ g4 A! }' P - let info = {. _* @: L2 i1 |2 q: r$ Q& u' Y5 h
- ctx: ctx,
& w. d* [- K4 ? f8 t - isTrain: false,
- ^ s+ f! v! g! p+ H - matrices: [mat],
8 \ ^% L2 w2 `6 u - texture: [400, 400],+ a6 K; d# T! d
- model: {: }& q; f/ a2 R: q9 y5 F
- renderType: "light",/ i; s, f) J; b7 H+ g' L7 ^% m3 U
- size: [1, 1],* q M6 r( D% o1 P8 f
- uvSize: [1, 1]
! f2 |' h7 a# v) c - }1 g: k/ o* b2 @( t0 ~8 X: q
- }
, @& U" P+ t5 c - let f = new Face(info);9 v! e& f3 ~6 e) h
- state.f = f;6 }7 X9 W7 c) X8 W9 K4 _
- 1 s7 W/ q0 B* d/ @) A
- let t = f.texture;
9 N( w; F* z( |: s2 t - let g = t.graphics;, U$ ]3 q3 V) S1 o8 A
- state.running = true;/ a. S* \; Z1 y2 n
- let fps = 24;* o2 D# ]# q% |& @6 R A* }$ K
- da(g);//绘制底图% J4 _7 v& t* W( ?8 X
- t.upload();' q5 M1 A( a' W- W) o& y8 i6 a
- let k = 0;: f3 M6 Z* e8 O& M. V: v: c, v' }0 Q
- let ti = Date.now();- D h4 ?$ j" D
- let rt = 0;% [) X- a" z5 W" z6 @) W0 x
- smooth = (k, v) => {// 平滑变化
`' T, {7 R' R) V - if (v > k) return k;
3 [; d6 L& F# q Q, X% F - if (k < 0) return 0;* J. ?7 R. o. \8 G* ]
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( s$ W$ b8 [$ x1 c. K
- }) M# G e) R3 S- C: }, `- t6 p
- run = () => {// 新线程1 ^1 I+ t, R9 U- @1 A3 C( q
- let id = Thread.currentThread().getId();3 o! s1 E* S+ o! A' c
- print("Thread start:" + id);& u' T% y% E0 v/ e$ ]
- while (state.running) {
* a- @5 Z7 g( L c - try {: w& B% L5 g# [7 o2 [3 K) ~4 T9 _
- k += (Date.now() - ti) / 1000 * 0.2;4 N- D! F. P$ s# }2 z
- ti = Date.now();
# F# O. C, @+ x" D+ e# G ? - if (k > 1.5) {
6 m$ R0 x& k' j4 U - k = 0;
4 U9 \8 }. p+ D - }
. i( P; Y2 U4 U) J# F6 @- u - setComp(g, 1);6 q" c Y) v$ u+ L
- da(g);
# D# w" V3 A+ j& S - let kk = smooth(1, k);//平滑切换透明度
h( J; w# Y* T - setComp(g, kk);* o& s# O e5 q
- db(g);5 z: }) d4 j5 x- z- L3 A
- t.upload();
0 E) p+ Q5 W2 S E - ctx.setDebugInfo("rt" ,Date.now() - ti);& V. v' M/ Q. q) m& W" U. y2 [
- ctx.setDebugInfo("k", k);" L: ]. J* k: M: [5 v* n/ Q
- ctx.setDebugInfo("sm", kk);# @1 p% v. Q: i% Z2 e
- rt = Date.now() - ti;+ Y* i" ?# e3 l" S9 K5 p2 C& }' ~
- Thread.sleep(ck(rt - 1000 / fps));" l6 v2 U7 Z- C: I9 [
- ctx.setDebugInfo("error", 0)
: n% c, { J/ |7 x0 `, ] - } catch (e) {
- B* T& m# A" @3 K. A& }4 r4 R" e - ctx.setDebugInfo("error", e);5 {. Q+ l- `$ M
- }% Q$ N5 d# y: U" Z3 C- S4 Y5 e7 T( r
- }' }" ?/ z* i2 U: L* c6 J6 J! Q
- print("Thread end:" + id);
i* y. C8 U+ F0 S - }% P6 a* P; o- f& t4 h- T
- let th = new Thread(run, "qiehuan");0 _: q8 }+ U' ?; @
- th.start();
: s+ I# f9 i5 y0 x - }
: V9 E% J& ^7 {( l2 }, ~
. a& @, a2 r; W( p( Q. I* K0 z- function render(ctx, state, entity) {: I0 ^, [& m3 t0 c D( F
- state.f.tick();0 y" L: P; ^ L
- }* N: v9 X5 U6 Y( l7 b1 F
- ' f# H" q3 t J, w
- function dispose(ctx, state, entity) {
6 ^2 h2 p ]5 x/ F. b$ s - print("Dispose");. U) R! C- |, x% l6 n9 u6 C0 z
- state.running = false;
( t$ E2 X5 P+ E3 d& n( P7 c' b! r - state.f.close();1 Q* C) J, G9 j( l. ?7 S& v; p, G
- }3 m% {9 X1 X3 I6 C2 M7 k) H3 {
0 }# }, b: u* g2 y- function setComp(g, value) {$ a @4 L$ Y1 P4 j, w
- g.setComposite(AlphaComposite.SrcOver.derive(value));
" T' c- x5 @7 Q# j& S8 T - }
复制代码 # D4 J3 S/ P/ c" J7 P5 B, ?3 E
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。, K) y7 i) B- Q
2 H; Z' \& c% e# [( v# v$ s/ ]# \4 s# U% _; S# B
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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