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9 Y# T, A! k" j2 q( s- [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。
, t5 F! R3 M V; w5 M- importPackage (java.lang);
' r, U% k' e; B/ b/ Z3 _ - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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" ~5 k$ e. C+ s. b! c$ R, q. I" b. J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
. r) P r8 @' }% G
4 B; E/ b' v( n: ^- function getW(str, font) {
. u0 A/ i& Y$ @2 k) x - let frc = Resources.getFontRenderContext();2 x* [. h2 P3 O9 l$ L' S+ K& S
- bounds = font.getStringBounds(str, frc);" X" t* m% N& P2 K) A7 P
- return Math.ceil(bounds.getWidth()); y/ U" N. V% u8 s& u
- }7 ?# C% W) U( I
- ' V) E) Y5 R U u) M
- da = (g) => {//底图绘制, V8 `* M6 \2 E. z) e
- g.setColor(Color.BLACK);
$ q- J0 M* D! P/ X% i/ b" L - g.fillRect(0, 0, 400, 400);
2 B3 H$ J2 W- J& B$ ~ - }, z- b, E) N; H0 O z
- * |3 T4 }5 [( N5 D' X7 M
- db = (g) => {//上层绘制
+ w1 K- x5 K: q1 b1 v: c# i' C, O' r* U - g.setColor(Color.WHITE);
% L" [1 b: k! O9 z+ X5 f2 _9 L* T - g.fillRect(0, 0, 400, 400);, p/ x1 R1 `0 p) o" b* O, }
- g.setColor(Color.RED);
+ }+ k* \+ d* h N- l- p - g.setFont(font0);$ u: P) {, S1 n! l. u
- let str = "晴纱是男娘";' c% f1 w" h' m% B
- let ww = 400;
" ]# ?3 O3 H) H% U/ K! Z9 f - let w = getW(str, font0);1 X" n# \" g, q+ ~
- g.drawString(str, ww / 2 - w / 2, 200);
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- * C: y& p/ [% ]8 a) |3 H
- const mat = new Matrices();
4 P# d& B4 {/ U; P2 u - mat.translate(0, 0.5, 0);3 O A0 I' M/ E7 Y6 W
9 k) O' f1 N9 a9 R# Z2 n- function create(ctx, state, entity) {" _0 M9 Q0 T; p) c
- let info = {
' h5 E, H2 m9 G9 u+ V - ctx: ctx,( h; ]9 o) y6 A& x- n* u
- isTrain: false,- b# H1 v# T9 S
- matrices: [mat],
) ^2 m1 p: L* m5 [: } - texture: [400, 400],6 S% v1 L* a2 Y2 s
- model: {
' R2 C) s! [/ ~7 n1 O b - renderType: "light",8 D8 j! O+ A, y6 N6 v
- size: [1, 1],, _4 F. C. G( Z" P
- uvSize: [1, 1]) e" g5 i4 u6 y$ w) f
- }
. |& y, r ~9 Y) s) O. a- B. t! g# M - }
1 R" L' T6 J3 ~2 g. w. R+ L - let f = new Face(info);
* |7 ~/ k. S6 K4 n& w+ Q: P9 J - state.f = f;
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& N9 G+ y6 w7 K; G( r7 O ?- let t = f.texture;
1 l& X5 i; Z; G/ [0 j - let g = t.graphics;
/ V6 L5 Q3 i }3 r# `- u - state.running = true;
/ e4 J" s$ x3 w7 X+ K - let fps = 24;1 C* l& t/ f. C
- da(g);//绘制底图
% @6 ^' [# Q+ H: a9 G - t.upload();
* u) R& t. X& r+ y' u$ W - let k = 0;0 V( X, S; m. z* C* D5 _
- let ti = Date.now();! u2 R: C# Q( a( `' w
- let rt = 0;! t+ c! z C1 @7 `* E6 F
- smooth = (k, v) => {// 平滑变化% R0 K+ Q0 j' f6 B' s. y6 a2 I
- if (v > k) return k;; Q7 A+ }3 ]) y0 v
- if (k < 0) return 0;
- E. [/ }! w/ z - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
- J4 B: s& ]+ Q/ X, m/ U9 _( V9 E - }
! w) F3 M3 ?" c8 J |4 b* Y - run = () => {// 新线程6 Q! Y/ |- b7 }: k% W( \- W: Y/ Z3 V4 }
- let id = Thread.currentThread().getId();, t5 }7 _1 H5 r; f
- print("Thread start:" + id);) V5 W4 f. d1 u' F8 N
- while (state.running) { P- c+ M. ?$ ]4 T; e9 ]
- try {
- M$ d8 d4 w( W4 g' n - k += (Date.now() - ti) / 1000 * 0.2;
- C0 l7 Z7 Z- s3 C, O; x$ S t - ti = Date.now();
2 H/ N$ z) o8 ^7 J: K& i# S1 E - if (k > 1.5) {
6 w: g! E+ l+ O1 h! Z - k = 0;
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- setComp(g, 1);
+ r; z2 {9 K0 T9 A - da(g);
% a2 V4 X3 }7 J" D% S1 f. ^ - let kk = smooth(1, k);//平滑切换透明度
/ }" p: I. ^" U8 Q4 z: H: x - setComp(g, kk);
* P/ W* P5 U2 n1 k - db(g);# G- m" w$ e5 z9 P, H
- t.upload();" I6 [+ D* M/ w" I/ j
- ctx.setDebugInfo("rt" ,Date.now() - ti);5 R; H9 U% y, A
- ctx.setDebugInfo("k", k);
* D1 J/ \9 M* W }; x( f - ctx.setDebugInfo("sm", kk);4 h$ {$ b7 o/ h4 s1 U* J
- rt = Date.now() - ti;
" h5 k( f; n( _% B5 k - Thread.sleep(ck(rt - 1000 / fps));
1 Z8 F ~7 f1 m - ctx.setDebugInfo("error", 0): y$ a7 F- w" E* F4 N5 q3 B) w* ?
- } catch (e) {
. W) _2 H1 G+ Y, R* Q - ctx.setDebugInfo("error", e);/ u4 Z3 R: U; j9 U
- } N; T2 d8 y; z; T% h
- }
, g- P' K, m. }$ Q5 E' k( Z& _ - print("Thread end:" + id);
- Z7 M/ y2 L0 t1 ]2 ? - }
/ [1 |9 A, a4 } - let th = new Thread(run, "qiehuan");) ]* o) m& w6 U3 F( q
- th.start();
# ?! w% a2 f3 A4 {' h - }
' [- n; e$ Y5 ]1 V/ Z; ]3 @8 @ - + ?6 R3 `% W4 L$ T; \9 h* f) d
- function render(ctx, state, entity) {0 O" M4 L& ^2 _- b2 ~3 A
- state.f.tick();
2 R5 H# j6 b7 L4 Q' m l6 n# f - }
2 J1 h/ Z$ H c* G9 h
6 o/ u% |# A; R2 t1 U2 @1 U- function dispose(ctx, state, entity) {
: h) g8 `2 u. R, e - print("Dispose");
5 A2 w! f3 _) I4 o' `: F - state.running = false;1 `: z9 l% ?/ s8 `; s1 O
- state.f.close();7 }- P- T K& `
- }
0 x0 r/ ` T+ ]3 l6 k) F: [- `3 X - 2 L3 o0 p' a1 n8 }" w0 S
- function setComp(g, value) {
/ e3 M9 c$ C* T7 K3 p8 K - g.setComposite(AlphaComposite.SrcOver.derive(value));& r$ t$ T+ |$ C
- }
复制代码
: _% k; i- {$ \1 i2 K- q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。
/ |' f& W9 x3 o4 {' C; Q& P f- U0 n- T" e4 T: r
0 G! ^/ Z) k$ Z9 r# n4 g- T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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