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7 w' E- ?; o% J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。
, `/ j1 V; P; C5 y) u- importPackage (java.lang);
- @+ f# Z0 z/ D - importPackage (java.awt);) ` Y) @) t" T" b
- ) `7 Z6 P$ c l% Y* }
- include(Resources.id("mtrsteamloco:library/code/face.js"));- k6 j* S1 ~ W7 h
8 M: t7 J6 B x) G- b- q" ^- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {) \3 e7 Q5 B2 [) U8 Q P
- let frc = Resources.getFontRenderContext();
9 `6 e! Q4 M/ z8 J' W6 | - bounds = font.getStringBounds(str, frc);
* |' A& u2 I# \7 v, z - return Math.ceil(bounds.getWidth());, \" o* r; A+ k7 R* G) Q; t& [- W
- }' M/ B5 }$ H0 J8 C1 {2 u
- ) Y0 q p8 [5 d- {2 `- m
- da = (g) => {//底图绘制
, E2 ?7 |+ C6 P) [" O& K! c - g.setColor(Color.BLACK);
& k7 e/ \4 q* ^1 Z& e: X% n - g.fillRect(0, 0, 400, 400);
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- ; G5 z# T: h- a9 W
- db = (g) => {//上层绘制
- r! C# P0 @+ @, b- u( Q - g.setColor(Color.WHITE);6 I! H! G( _, M- E% O5 O
- g.fillRect(0, 0, 400, 400);3 ~$ P% c' B: A) P" E
- g.setColor(Color.RED);# _* M- u0 g r5 ?9 Y
- g.setFont(font0);% v. n0 y$ p& I1 h. c: E
- let str = "晴纱是男娘";: @7 c8 c8 F' ~# a9 W
- let ww = 400;- ~/ _/ z8 @! ]! Y3 M
- let w = getW(str, font0);+ D" B. W0 A4 L) x
- g.drawString(str, ww / 2 - w / 2, 200);
, i' }2 U4 G# T) ~: t9 T - }
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- const mat = new Matrices();
6 e7 [) I6 @0 ~ - mat.translate(0, 0.5, 0);
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8 U. w1 N- o* k8 M( T8 G- function create(ctx, state, entity) {4 { d8 t* n1 M, J- E$ j; p
- let info = { |. j/ F0 O2 r+ {$ o: W% o
- ctx: ctx,' E S5 t/ [6 U2 g! a% D' K( |
- isTrain: false,
9 X4 Z. \. H" V& s - matrices: [mat],4 [# X# i7 `( D% i% m
- texture: [400, 400],
+ w6 G5 e( ^' k - model: {
; e" `1 w! R) E" q1 P4 `* x - renderType: "light",
/ c( q* E. }% B0 M6 f4 s- n0 b - size: [1, 1],
) Q' B* y$ F. P: l9 ^8 b, K - uvSize: [1, 1]9 J+ M9 {6 o8 Y( y! e
- }$ c- J y! i1 d4 b9 b
- }
: p# ?0 p/ Y' E3 b - let f = new Face(info);
9 U. ]0 n: a+ u! q; a: p7 U- V - state.f = f;" _2 \2 B! w G1 S6 U4 L
% S% ~" j4 {6 n: F; I; U) K- let t = f.texture;
, K" U/ {" o* s) V/ N - let g = t.graphics;" i4 Q# z5 e+ w2 C
- state.running = true;) u* b L; Y! L; B$ z
- let fps = 24;' I% l9 q$ u. I5 k
- da(g);//绘制底图; V: a) k0 u4 M+ P i3 s! K
- t.upload();+ n0 Z; v* M* O9 F* E5 e$ P3 z
- let k = 0;
* A3 t& |2 c3 Z m, L6 R - let ti = Date.now();
( ^. ?- L. r9 x+ L - let rt = 0;
/ W7 e6 `9 C4 O/ A$ ] - smooth = (k, v) => {// 平滑变化
% j* r' @5 y5 F - if (v > k) return k;4 i6 U" R2 ?- u: X; Q! p; u
- if (k < 0) return 0;
7 a3 P3 Q, C7 p$ n ?. i - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& ^( t ~- o: n5 u r; ]2 U+ ? - }
% R* L. h9 X$ K/ U& }- Y - run = () => {// 新线程
% x# P$ J+ h1 g5 D - let id = Thread.currentThread().getId(); p& B9 _2 h7 L- l
- print("Thread start:" + id);% U) Y; {1 w9 Y$ y ?: k. X% m
- while (state.running) {
* r5 K8 N0 n4 d" a! { - try {1 ]4 ]" w: N( t& G R0 U4 N- R
- k += (Date.now() - ti) / 1000 * 0.2;
9 ~% ~- c& ]. n- J3 D - ti = Date.now();5 v" r# B5 B) @1 L9 b
- if (k > 1.5) {
% o; v, v1 K2 {, e R' U& h - k = 0;
6 C$ ^6 a# r+ O/ y' z- m - }" L7 e; k" x4 r; ]
- setComp(g, 1);3 _) Y4 l: c2 [% w' K4 H% M% E5 q
- da(g);+ o% y5 _5 o0 U; ~+ ~( o
- let kk = smooth(1, k);//平滑切换透明度
$ j( C {% r1 v x- K7 d3 d2 W - setComp(g, kk);* ]! D0 L6 p: r' e1 O; Z O2 }
- db(g);
) n1 a1 W$ g. G - t.upload();
7 V$ ^( V& s, l' S! X" t+ H - ctx.setDebugInfo("rt" ,Date.now() - ti);1 K# S3 @# t: E% H* B/ H* Q3 L/ H
- ctx.setDebugInfo("k", k);& X+ `2 h$ Z- ?$ j- y6 D" n4 F. U% \
- ctx.setDebugInfo("sm", kk);2 d- t! Q0 a$ n# I, j6 i9 W
- rt = Date.now() - ti;8 ` c* l- J. G2 _
- Thread.sleep(ck(rt - 1000 / fps));, `. `0 o) c7 A9 c3 [2 Y4 ^
- ctx.setDebugInfo("error", 0): g* Q8 Q1 |# Y3 M6 x# m0 }' W: _
- } catch (e) {
7 F+ u) r0 f8 a6 p6 X- U - ctx.setDebugInfo("error", e);
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- }5 x1 l d9 ^1 |6 g; j1 J7 b& F
- print("Thread end:" + id);7 V/ X0 I0 ^* H, ]3 O/ x( }
- }) J+ Q& e2 w' `/ D
- let th = new Thread(run, "qiehuan");
D/ I' e8 u) Q! `) C0 f/ ^ - th.start();
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- $ o& Z- v% z: A) L& R+ F& M
- function render(ctx, state, entity) {
0 K/ J( L, Q5 ^" Z6 d - state.f.tick();
+ P( G9 K1 H. {; l' \2 f - }
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\5 P* D6 @3 O5 a' V- function dispose(ctx, state, entity) {4 N! n0 ^0 z& @9 { L/ y
- print("Dispose"); R0 I4 _2 f$ t3 k1 Z
- state.running = false;
! o# w+ K: s7 R - state.f.close();
9 L8 V( e& S5 o8 n8 J' e. u - }
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- function setComp(g, value) {
% Q7 k( V& O: T* _3 x* N - g.setComposite(AlphaComposite.SrcOver.derive(value));) H, {+ e9 ~$ y
- }
复制代码
5 s! D+ V! ^( 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。, w2 a0 W5 A B8 m
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, b4 o- [) Y* B' A A2 k0 Q$ S% z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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