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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。
$ ?- J( l3 i% R/ e) A m- importPackage (java.lang);
8 e. y. x* H2 c: F6 ]8 u9 V - importPackage (java.awt);5 K, T! L& p& ?( U
6 ?: C3 M( l7 \4 b8 D; s- include(Resources.id("mtrsteamloco:library/code/face.js"));7 X8 @9 m8 x, x" K, T Q) S. x% o0 e
- 2 a1 r ^: E5 q( K9 a4 L) D* G
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
& S/ \' z* T* ^! E - + H2 D& }1 b4 [- f/ N+ f# R
- function getW(str, font) {+ B0 ?+ B( t& M M
- let frc = Resources.getFontRenderContext();
/ w: _+ h# K, A4 X% x - bounds = font.getStringBounds(str, frc);
" q+ Z% r0 T5 d! ^% {+ X/ _+ x! ` - return Math.ceil(bounds.getWidth());+ t; ~/ r$ T( F
- }
3 D3 K+ b# P0 @% T3 @! S, n: b. V1 } - . f4 k I7 c4 N/ k
- da = (g) => {//底图绘制9 X) I5 Q& W0 G$ ^. W
- g.setColor(Color.BLACK);% ^6 E' P& }$ H8 O3 \
- g.fillRect(0, 0, 400, 400);
+ y/ x" \# `4 A - }
0 D6 G# |( k; D, z
: \4 ]9 r: \# U6 r1 Z- db = (g) => {//上层绘制
g& V3 D% h' ~ - g.setColor(Color.WHITE);
! w J+ ?5 P7 D0 @2 k+ G - g.fillRect(0, 0, 400, 400);
8 u0 [8 `, Y2 a8 j4 S& E - g.setColor(Color.RED);
2 J7 A' O/ C/ I3 T+ e9 E- S G - g.setFont(font0);
; R3 c+ F7 r0 d+ X8 M5 \ - let str = "晴纱是男娘";, S% Y$ Y. c5 Z. T( _/ x
- let ww = 400;
, t# X, d" v6 I" E: ]- n4 a4 @4 ? - let w = getW(str, font0);
/ `. Z* T1 }( f' C5 U6 e - g.drawString(str, ww / 2 - w / 2, 200);
L& C3 [" n, o3 l" O) n. O) i3 w - }
0 x d; T% L6 j" H( C - ' |6 P3 g7 u4 @% C9 x, x! z; v
- const mat = new Matrices();
1 h. a, n, r9 J0 }% w6 l% Z2 w - mat.translate(0, 0.5, 0);& G4 F9 h3 D% c
- 6 d/ h* C+ {$ N. ]$ n
- function create(ctx, state, entity) {
. i- n% \4 R; d/ o8 U3 D- t - let info = {9 V. f7 Y4 E4 W& }
- ctx: ctx,) S E8 I- G% e: J
- isTrain: false,
, d+ c0 Q. e- K - matrices: [mat],
3 R9 F9 `; a1 ~- } - texture: [400, 400],
0 w% Z/ a6 k" y& o5 D4 A7 R - model: {; N6 s' s# w- C! I5 k
- renderType: "light",: o8 N( V1 |9 T+ I0 g
- size: [1, 1],
0 C" y5 ^! l0 p# ` - uvSize: [1, 1]1 b6 x! _4 w. {" \! y
- }$ ~$ s/ {% G& t; O" X
- }
# J1 [3 ^* n9 j - let f = new Face(info);
: @" J+ A4 C& `! ~7 Q( o( N - state.f = f;
- ]/ M8 E) x7 h1 w
& N6 y; u' |( E4 z% \- let t = f.texture;+ d( @( |1 L( y5 k: J: j/ |; s8 k
- let g = t.graphics;
# O, j u% F: c( Z+ I8 C( V; G - state.running = true;' H$ l+ p* a) F; \. y. I
- let fps = 24;
- _( M1 J% k+ j1 G ^3 N7 K - da(g);//绘制底图& M3 F& V! o' ]% i' c
- t.upload();
7 w5 P: a: y7 s/ N - let k = 0;
- p) U7 H: G# g) X v3 K - let ti = Date.now();
( ]8 K, n4 ~0 R A& J' r - let rt = 0;' o; A& m2 }- S# y& E( T" l
- smooth = (k, v) => {// 平滑变化
9 m' f, |" ~. i, Q- Z - if (v > k) return k;
4 ]" p5 J# R4 G; l8 ~. F( Z - if (k < 0) return 0;
" K) b+ O$ P! h u- X" ?3 L. z9 } - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 s3 j$ j8 u8 y
- }. `- c% o/ }3 P; ~0 ^! P
- run = () => {// 新线程7 C0 B/ v+ a7 ?
- let id = Thread.currentThread().getId();
$ b) G; Z1 K5 P - print("Thread start:" + id);$ P, v w2 b$ l4 Z$ B
- while (state.running) {. V' }( M( u, I! `, O
- try {9 ^* N2 I$ g( l
- k += (Date.now() - ti) / 1000 * 0.2;
& W7 O5 e1 l" E! G - ti = Date.now();7 k: F& \, ?$ S* a
- if (k > 1.5) {
U5 h: I5 K5 c ^& D - k = 0;0 p. X" X8 Y1 N" r
- }
1 Z' |- {( k/ v - setComp(g, 1);
2 M! l6 o) I* V/ a8 ~$ c: i - da(g);: h3 L9 a$ T- v/ w# X+ Y% C
- let kk = smooth(1, k);//平滑切换透明度
, j) h7 ~5 Z V: a - setComp(g, kk);
7 x. m5 M, d# W; D' q - db(g);
6 G& g1 R) H4 A$ J6 Y - t.upload();% j( `* B7 S4 T1 A3 P+ I2 w
- ctx.setDebugInfo("rt" ,Date.now() - ti);# u. b% k& b! n% q! j' ~7 O8 W0 G: ^- J
- ctx.setDebugInfo("k", k);& u' O, ^5 j, ^0 @, w
- ctx.setDebugInfo("sm", kk);
( _: }1 i9 X( v% v- B - rt = Date.now() - ti;! @ e9 L m7 F& A* j$ F: P l
- Thread.sleep(ck(rt - 1000 / fps));+ o% q: ]8 q9 _9 {) S( r4 N
- ctx.setDebugInfo("error", 0)
6 C8 ^: a) U& i; T& M - } catch (e) {
+ e# [% B& }) f9 L; z, i; p% R! P - ctx.setDebugInfo("error", e);1 K7 k8 e/ A$ Q6 |7 X) s: k+ [
- }
) _/ f0 \* e8 C; ?1 y - }
% U( J5 Q) k, G6 {6 y8 }( y - print("Thread end:" + id); V- G+ c9 t9 n4 t% Q2 h# B4 s
- }- s8 f: t" q& v# N# ]
- let th = new Thread(run, "qiehuan");
1 b z7 v. ^& P; S - th.start();; l f$ C) u* d
- }
9 e; p% O: X3 @' W1 ^8 j" K" x
& ]6 s$ U+ j2 a; {2 }7 G- function render(ctx, state, entity) {+ H" e7 ] e+ h" G1 ~0 J5 [$ g
- state.f.tick();
0 d; G* c2 y) x8 G9 Q( r! H9 ]3 K - }
2 I3 O$ D7 H" u! R
9 k6 k+ C2 u: n: m- function dispose(ctx, state, entity) {. U' e- }) ?# b7 A: n3 [7 V ^* F
- print("Dispose");& k) }9 t' \% B0 ]4 V
- state.running = false;
/ O9 G8 G$ x" B* [( C, {5 x3 ] - state.f.close();
% O9 r# V% u. w/ F# H5 ^ - }2 L: j1 S7 A8 ~) A
* _$ Q; k4 P% D& U- function setComp(g, value) {
! J0 U7 } u6 P% w) ]& x2 P! g0 C - g.setComposite(AlphaComposite.SrcOver.derive(value));* s/ l/ i0 K- ?5 Z- ^
- }
复制代码 ; p0 ^7 U8 \) R/ o9 C' G! K
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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" d+ p) ]7 O1 f, e0 P/ 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)& [. R- O- S6 O J
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