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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 `# R% H$ c6 ?- importPackage (java.lang);: O* S# P* a6 \ d0 f: d0 G D1 F
- importPackage (java.awt);
: H0 z/ y; l" U1 C; e, ^ - S6 k/ f1 [3 G$ L5 v% a
- include(Resources.id("mtrsteamloco:library/code/face.js"));5 L& K! f+ D! F) c' m
- Q: Y( j7 \) |- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
* X9 @9 A- H2 }' V9 h; D
9 }+ n6 r. ?) Y/ a+ L" C8 [2 Y- function getW(str, font) {3 M8 Z4 ?3 o$ p& w
- let frc = Resources.getFontRenderContext();& c1 o. m' m4 Z
- bounds = font.getStringBounds(str, frc);- G$ H6 ] m$ V" C. o/ Z
- return Math.ceil(bounds.getWidth());8 U2 f2 j- D6 v8 y- ^8 v0 Z, G+ o& m
- }
2 t) l: M. @, Z - % H" x- v8 ?- ^( a- L8 t7 C8 f
- da = (g) => {//底图绘制9 w X" U/ z$ `: D% g$ c' [6 R" ?
- g.setColor(Color.BLACK);2 P, W q9 h2 Z$ k4 p
- g.fillRect(0, 0, 400, 400);
' _6 ]7 E. R. j% u8 ^1 S - }
) K6 @" [9 A2 l6 r" C - 0 }: ?5 X. w* v6 s) J7 [% b
- db = (g) => {//上层绘制( K8 Z+ [' @6 m3 H" P- o' m, h
- g.setColor(Color.WHITE);
/ K" T! q: S; M, o9 C - g.fillRect(0, 0, 400, 400);
( f& s3 m3 d* ^8 S - g.setColor(Color.RED);0 r6 m6 ]% w7 L" m# p* F; R
- g.setFont(font0);; ?2 `+ G% n4 T1 A" D
- let str = "晴纱是男娘";
# P+ ^- K# @: W6 h - let ww = 400;
# O! t. Q+ }" ^0 v4 n/ F; q7 h! L! F - let w = getW(str, font0);
/ b5 k4 o9 y7 q V - g.drawString(str, ww / 2 - w / 2, 200);
) G! _9 j( d( T% C4 y; l. @ - }
# b; U4 k+ _4 j: |0 m8 a - 9 z, q! b8 R# ]9 Y& L: d
- const mat = new Matrices();
/ A* p. z; O- b) Y - mat.translate(0, 0.5, 0);
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3 F$ k- E- j8 f( o) B- function create(ctx, state, entity) {6 H b7 q! u* y, a
- let info = {/ C' Q6 B6 F3 J+ m" F
- ctx: ctx,1 m5 }/ X& h. d. o) T( Z _
- isTrain: false,
( O( K0 \# u4 Z) o! |1 _ - matrices: [mat],/ C* [7 A& e0 A+ e" x. z
- texture: [400, 400],
4 r. D; k2 c( x1 t5 I" b( E& V - model: {4 y, W) z; B) k1 v, r" A: w( G6 ~& W
- renderType: "light",, P) C- C2 Q: `& S
- size: [1, 1],
% ~% @( k+ x6 @* ] - uvSize: [1, 1]
8 J+ s$ r, O% |4 l( S5 H% @) T e0 y$ U - }
- {6 _, O; @% } S4 \) y& [ - }3 m- |5 B i% J c8 E; b
- let f = new Face(info);
5 t/ R' E7 i0 s0 ?) p8 L, V: Z - state.f = f;
' q Z: R: `! V2 S5 {6 @ - ) k% z/ Q7 i/ s# }( A9 |
- let t = f.texture;
p0 j! n; X, K- s - let g = t.graphics;
3 ^) l5 `- u" Z* y - state.running = true;
& Q0 t$ s. L% J: z1 K - let fps = 24;
+ F7 q& l* R& P! l - da(g);//绘制底图
# S7 t+ |$ [* E - t.upload();9 w. G1 ]0 {* t w U
- let k = 0;
9 s t' L5 R9 M2 L, s - let ti = Date.now();
4 N" o, q2 G7 x+ ?" O8 J - let rt = 0;& b. \1 }: \: n& i; E1 ^$ R/ ?
- smooth = (k, v) => {// 平滑变化8 |0 g, {% ~8 o! ?
- if (v > k) return k;
5 f: b: Z, G7 e1 T - if (k < 0) return 0;1 v x# q# [: G/ Q% {
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 {* t# X& O" k' `( @5 m0 n& a - } @/ f) A( D+ `
- run = () => {// 新线程
1 Y# N) Y- n+ d: l" ^, l. z5 }. Z - let id = Thread.currentThread().getId();
" h: c, b; ?5 k3 Y - print("Thread start:" + id);6 \1 C5 {. b9 [5 F7 e. h
- while (state.running) {, `" k: X& J) a2 ]- r% n$ L
- try {+ [& C9 {' R2 c" _4 J# y
- k += (Date.now() - ti) / 1000 * 0.2;! F6 h9 d" C. ]+ ~( T
- ti = Date.now();' P& d. q) c, h2 i+ e
- if (k > 1.5) {; S2 @/ g1 d* `- E) S% B/ h
- k = 0;% O5 g& C( G" W# K: Z9 P3 q
- }
) m5 {: O8 X" ~+ f - setComp(g, 1);+ M. d @ {* T Z* ~$ O) v8 ~/ z
- da(g);
5 s3 Z& w# Y; z; ? - let kk = smooth(1, k);//平滑切换透明度! W2 p* i; A; M8 k( [( h/ V
- setComp(g, kk);
& `, P% i8 x, P) G1 m( } - db(g);
6 J* N& p b! P/ F6 E( f) Y - t.upload();
, @ p$ z9 Y6 Y - ctx.setDebugInfo("rt" ,Date.now() - ti);
3 n9 c3 W3 K5 q& ^ h0 o - ctx.setDebugInfo("k", k);* ^ s; J0 G) {
- ctx.setDebugInfo("sm", kk);
8 u0 E& ?5 Q- w - rt = Date.now() - ti;" q6 R- c% ?- S8 P0 `
- Thread.sleep(ck(rt - 1000 / fps));. a5 d5 P' p2 E0 V* G8 n3 ^8 Y
- ctx.setDebugInfo("error", 0)8 P! ~8 L! `* l+ @& Y; G4 j
- } catch (e) {
, E @; |2 t: x" L- x - ctx.setDebugInfo("error", e);
1 |$ C1 I! j7 Y0 x- F p - }
! ^+ \' R) q% Q# \9 J - }
+ B R" |' K% R' e( n - print("Thread end:" + id);8 }# S9 ^* V$ r/ A2 g8 K
- }- M- \- N5 U& g7 D* A
- let th = new Thread(run, "qiehuan");& M( F% o0 j/ T* y4 z2 N/ W. M
- th.start();* ]+ d, A9 P7 \, `' h- G5 }" u
- }# _" S v+ P' k* T( d; |( L& E2 q) h' _
5 {. G' `1 T* N7 P' T* @6 Q% N- Q- function render(ctx, state, entity) {
. ]! e0 h: B% E) K, b W, j - state.f.tick();
5 d7 I- @/ S) j) ?% S5 U, ~ - }
/ Y$ {% l/ O, c0 g) K- S1 N! a# D - 4 Z+ |! ?; u. b( F4 M% t1 A6 Y
- function dispose(ctx, state, entity) {# D" a" j. C3 I5 O% s
- print("Dispose");0 c5 k. E$ c, ^2 N& g
- state.running = false;
3 ]$ X6 x: ^8 { S( r& H' p - state.f.close();
6 Q3 O3 _. j% n - }
1 Y- D0 d) v1 m - ! G" Y8 Q" F* g" s2 H
- function setComp(g, value) {8 [' H. i3 B* o) n
- g.setComposite(AlphaComposite.SrcOver.derive(value));
0 C9 r/ S( f( r5 b( _: X - }
复制代码
0 s' i! l% a) a0 X7 J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。
4 p) n* l/ R) x( u2 y" t' T* G% N; r* H
6 n2 g1 v$ X2 U, Z" o4 _顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)4 J) e0 H7 S! R1 L
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