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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。& G7 ~6 _- T" |' x, [0 T6 }# e
- importPackage (java.lang);
2 |: d* y& v+ i4 a6 r% A - importPackage (java.awt);% A3 y, R" P. X" R; `
( W3 l8 u) Y! Z/ i- include(Resources.id("mtrsteamloco:library/code/face.js"));# q/ M6 |- `: Q Q ^2 L
- : T5 [6 N: R/ @( U2 @2 G/ ^1 t# H
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 V8 l7 _. U3 d8 z9 U4 g, V" A
- # ? g+ e" u$ x/ f
- function getW(str, font) {+ J) R5 b" [! W# A
- let frc = Resources.getFontRenderContext();
9 `' U$ j0 S& W! Q/ C* Y - bounds = font.getStringBounds(str, frc);) t9 a0 M7 b1 F, J0 Z6 w
- return Math.ceil(bounds.getWidth());" q! z4 u- l' ^; w4 v8 f
- }* s3 k Y% R" B( ~( I4 b
" o! Y' v. P0 ?% P& `- da = (g) => {//底图绘制
. ?" m+ O: v- F9 o( a4 t3 I - g.setColor(Color.BLACK);! z# h- Z: g8 }5 e5 h/ x
- g.fillRect(0, 0, 400, 400);: I) d: ^# K. X! {" I
- }( S4 ?& P( X' A% ^/ P; V0 ~
- ) u' q4 t" y! W# ^% i/ O( ?% d& P
- db = (g) => {//上层绘制" x: w u( l9 f, S/ j/ Q
- g.setColor(Color.WHITE);
5 }& Y' Y% n! X7 b8 }5 l1 {5 a - g.fillRect(0, 0, 400, 400);" \! R3 R! ~: S& W
- g.setColor(Color.RED);
* v/ P d% ]9 o. _ g7 T! v - g.setFont(font0);
: H# x) p( E/ z) o& e. x - let str = "晴纱是男娘";
' W+ E, J1 v7 }" P) L7 b+ ? - let ww = 400;
8 y- [5 ~" T1 \- K ^! v - let w = getW(str, font0);
, d0 B5 g8 K5 E ^: T - g.drawString(str, ww / 2 - w / 2, 200);0 w( u) o) o4 k+ U( y2 f9 E( H
- }7 W( z* |1 l8 \
- ) q; A N' B0 w+ o
- const mat = new Matrices();2 ~0 d+ Y7 M: n9 ^/ G: X
- mat.translate(0, 0.5, 0);# F% N* T$ l; {5 _* a( R- L* D5 R% u- l
. o. n4 m, ]! w- function create(ctx, state, entity) {0 F+ Z8 }) T6 \% B6 u6 i- q
- let info = {* `3 q4 g- W! u
- ctx: ctx,7 O* r! O5 b: B! S' s' o6 E' y+ n
- isTrain: false,
$ T" d3 r, K3 u. w0 O3 E - matrices: [mat],, w8 h* [* P5 ?) n8 _8 c: U. s
- texture: [400, 400],+ L7 p+ _2 k4 G- M
- model: {' s( l m9 F D6 f" i
- renderType: "light", `8 f+ s, v5 z4 H4 b: X- U
- size: [1, 1],
* m {$ g, d; i/ y m( ~ - uvSize: [1, 1]) S4 m4 V4 ]$ Q0 O
- }- x7 k* ~; ]7 w2 N3 d
- }' n8 o1 b) J8 s" D( x
- let f = new Face(info);0 Z3 ^/ x- n0 U: `
- state.f = f;! O' f- D: a( p. J: T$ @* ]% [- ^
& }$ U. S0 b9 B B) G8 }* Z, L P- let t = f.texture;
, O, ^( I) A8 c6 x4 w) k - let g = t.graphics;
9 U+ h/ T$ R: ` H% q8 s - state.running = true;
8 Y; b$ b/ ?; B) q - let fps = 24;% Q# y& K6 ] p6 p/ b- J
- da(g);//绘制底图5 ] V W$ i5 y% g7 `
- t.upload();, a0 j0 v$ J) h: E1 N9 z5 q9 v
- let k = 0;
' c! } ?* I1 |3 Z4 n4 V8 ] - let ti = Date.now();' f: C' s5 b" `- Q
- let rt = 0;
: L! D9 U- U1 R! ?- T! \1 j - smooth = (k, v) => {// 平滑变化3 H6 C* {' [, j1 K
- if (v > k) return k;
; y0 L( S' V g$ b' x' Y - if (k < 0) return 0;
) I+ E! o5 a6 n! @6 e - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
F+ h, I3 w% H7 f/ z& X5 M; O6 t - }$ V9 C, e! a+ J: h+ I6 c
- run = () => {// 新线程
! c! F' ?& o( F# v5 c/ O - let id = Thread.currentThread().getId();" Y; a4 W2 b( @
- print("Thread start:" + id);
+ S' Q: S7 {' }, {+ B - while (state.running) {6 T, v( \3 S6 k0 R8 P
- try {9 l7 ^% F+ V8 I- | k0 i
- k += (Date.now() - ti) / 1000 * 0.2;$ y3 p" r3 a6 u8 n: i( F9 X, L! l
- ti = Date.now();
/ r8 A" n& [5 o3 ~ - if (k > 1.5) {4 c5 \- s B4 j e
- k = 0;& T- F, R" b4 f, b) m O" J' }' y& @
- }1 E$ w, G2 i% w8 [+ L' O
- setComp(g, 1);
! B- ~' f1 ` E( c) t/ O/ h - da(g);
( {* f c& ]! ^ W. y- p5 a - let kk = smooth(1, k);//平滑切换透明度
9 p5 p) m4 R' O6 E+ j! | - setComp(g, kk);4 f4 p" P- T, E% R% Y @7 a( a
- db(g);
3 t6 m5 Q' Z/ X, u - t.upload();! D) g$ e0 V1 B5 ^- v$ R* N$ c; O
- ctx.setDebugInfo("rt" ,Date.now() - ti);: ^, m$ e" ?- P
- ctx.setDebugInfo("k", k);1 e7 l( Y- |6 [- }1 W
- ctx.setDebugInfo("sm", kk);2 C2 c9 D/ c- ]# p0 k6 B
- rt = Date.now() - ti;
* g M2 }' H' I# i% O# G0 j - Thread.sleep(ck(rt - 1000 / fps));7 `# u; D5 g( p
- ctx.setDebugInfo("error", 0)
8 J/ f1 |1 C! V) e - } catch (e) {
( c/ e, Z' A3 Y - ctx.setDebugInfo("error", e);1 u% {" w3 k2 p& ]; r7 U
- }! \+ o; ]1 ]9 l4 A! }
- }
r G9 M( v( \" R" k' m - print("Thread end:" + id);
4 g: h, v! o. t* P - }
" |' p. d, R% x5 `, n% y$ ] - let th = new Thread(run, "qiehuan");
# I! d1 r8 I. ]+ @9 r( D: r - th.start();
, ?( s) p5 i& {9 r a6 M - }
" r0 g) X+ u/ _; Z# i# S K$ n - ' u# a7 }, l0 q3 ^8 H
- function render(ctx, state, entity) {4 y, [, e8 Q! Z! P9 P
- state.f.tick();7 G3 Y6 y' \8 E5 v- y/ k4 `
- }! `7 A t# s) C4 j$ c' S
- 3 ^6 O( J# B6 z: o5 T
- function dispose(ctx, state, entity) {5 C7 a$ c/ d$ E# ~0 E
- print("Dispose");
1 c1 o/ r# Q2 H0 a. J - state.running = false;
+ P. Q) S! _% S) y, l9 G" T8 u - state.f.close();
* ]5 D R& _; d t - }
" |5 F, M+ U9 \; D: o9 [3 z - 1 t2 C" j4 } W! P% b6 k# h
- function setComp(g, value) {1 A* `9 o& ^ F Q
- g.setComposite(AlphaComposite.SrcOver.derive(value));$ F" v, Q( G+ M0 D1 [2 ]# n" `4 d$ c
- }
复制代码
: g" G6 X+ W4 w* G. m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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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)# W1 h4 h1 D' S3 Z+ s
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