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% _- j' \6 t& n* T( W% v5 K* Q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。
$ I+ u+ P$ |* V- K, g- importPackage (java.lang);
* p+ {" I( m- F9 U- j; t# d - importPackage (java.awt);8 t6 c0 H/ T7 S& P$ z
- G, e H5 c' [0 e- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- g) Y4 _4 F; r! z( b9 r# M- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);1 O$ L+ ~* \) O f" J" l: f5 z( Y
. s9 m: X" B1 q: E3 n: ^- function getW(str, font) {
1 B8 A/ b4 u9 E* n8 O - let frc = Resources.getFontRenderContext();
2 V1 e; ~$ e { M% _ - bounds = font.getStringBounds(str, frc);
, m' ~6 }" i9 Y3 d$ d/ Y - return Math.ceil(bounds.getWidth());5 \8 D/ n; ~/ V! L" \
- }( [4 x4 f& J' _# ~0 U
- ) y8 N( B! P( E" V2 [6 n m/ |
- da = (g) => {//底图绘制& \5 p1 M$ O: X; {- `6 Z
- g.setColor(Color.BLACK);
. P' S; T! ?. S1 T. T' k5 { - g.fillRect(0, 0, 400, 400);& @% L. |2 }0 c4 l/ v
- }' F- \0 ?- }# \( o, A$ z% S
- ' s( L/ Y# _ v: i; h# _# Z% z
- db = (g) => {//上层绘制
1 |/ j; ?& ~; h* \3 d/ f9 Q; Z% _ - g.setColor(Color.WHITE);
/ T( n& F) F3 H1 S+ X) k - g.fillRect(0, 0, 400, 400);0 Y: Y! A% |7 R; y3 o6 n
- g.setColor(Color.RED);- }+ F! n5 a; j( n; p6 r; q1 a
- g.setFont(font0);
& j9 x( X4 q. D$ n - let str = "晴纱是男娘";
0 ?& G9 `6 @/ m/ f9 E - let ww = 400;$ e6 ^& N$ J: n' I8 A. X
- let w = getW(str, font0);
. e/ A+ ~1 Z$ ~0 r5 T2 [' Y$ V - g.drawString(str, ww / 2 - w / 2, 200);, C% S9 n& q; k8 P1 m
- }
- @& g1 x* [; P W) L# H& P3 ~
6 j/ @( C$ u! i A+ o" s- const mat = new Matrices();
6 f) w8 k$ ?# b" K4 v8 U2 u. ~ - mat.translate(0, 0.5, 0);
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u3 ]. G, ?/ U) t# i3 ]# _3 N: |6 y- function create(ctx, state, entity) {
* o) w+ W0 U& }) b/ k - let info = {
; h1 J6 b6 a0 x: X0 N* ` - ctx: ctx, m( ^- e. g3 E. Q
- isTrain: false,/ |: S4 z! g/ Z4 Y+ \( |) ?2 a" G
- matrices: [mat],# I3 Y2 B+ T0 B$ ]
- texture: [400, 400],4 U; k% i; \- q3 v7 w4 }% D/ v
- model: {
" _' D5 y, \" Y7 Z- @/ w - renderType: "light",2 \9 `! `* m, ^+ ~; \% C ^
- size: [1, 1],
! y K- N; w' `1 l( n+ S - uvSize: [1, 1]9 Y$ D( X9 U$ f. A5 f; @: K( K$ W
- }
* D+ w* H% P+ e$ _* U( x1 z - }
" D: G8 ~# y- p% }, J - let f = new Face(info);
+ }' h3 c- k% S( t) C - state.f = f;
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) J. V" b v/ E" A- let t = f.texture;
, M5 {: j }" R1 L9 v+ i - let g = t.graphics;& k# b1 R% Q& A- v0 W& Q- N
- state.running = true;! z2 z9 A" J# E5 _$ @/ o& h7 ]. t3 h$ Z/ [
- let fps = 24;! M, t- g# Q/ N# \9 ^' m2 r& f! Y O
- da(g);//绘制底图
+ ?" c( ^& e( {1 i7 m ]4 X! j6 f - t.upload();* [: n( p a5 N5 o4 k) Z
- let k = 0;$ {* G- i R! f$ K! \* O( ?% r' D
- let ti = Date.now();$ \0 `1 V+ M& |8 x
- let rt = 0;& |% k- Z' Q. D( F. C9 O
- smooth = (k, v) => {// 平滑变化3 T7 j k; @6 U1 n; O9 H
- if (v > k) return k;
6 {5 W+ H0 D+ w( g9 c& R - if (k < 0) return 0;
! y# a0 n3 J: K; o - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 l b5 J4 M' f i. w1 }8 {
- }
' n5 b. V5 _! s: l' } - run = () => {// 新线程; t: [2 E# r8 J- b7 q7 T
- let id = Thread.currentThread().getId();. T9 ]) X% r0 k
- print("Thread start:" + id);- U3 h" u8 u& P: [ x& {
- while (state.running) {& P; F, h% c$ o+ g: Y
- try {$ G1 g. J. B4 H% r& X. Q
- k += (Date.now() - ti) / 1000 * 0.2;
6 {+ }/ H! U& ~) p: u$ g - ti = Date.now();% I# x% _: D7 x, I; K5 N
- if (k > 1.5) {
3 E" y# P- L! l3 l; P$ m+ }& N - k = 0;; [/ V: F5 M3 u6 b8 [3 u
- }
7 ^* q2 V7 w, [: W! m - setComp(g, 1);2 Y" i+ q4 q& p4 Q
- da(g);) ]( B8 }& _$ W3 L3 g! X
- let kk = smooth(1, k);//平滑切换透明度3 z+ b1 F# `1 K3 f
- setComp(g, kk);6 M7 ?* d0 L' `+ `5 H C
- db(g);
: V3 x! r" @, t. `0 B - t.upload();
M2 F+ p. t* x+ m1 i - ctx.setDebugInfo("rt" ,Date.now() - ti);4 v, d# x: ^0 F3 b2 i2 |
- ctx.setDebugInfo("k", k);
& E6 g* D9 A% s Y - ctx.setDebugInfo("sm", kk);
: P; R# q( L- Q7 I - rt = Date.now() - ti;9 d7 g* L/ q& s7 ? [
- Thread.sleep(ck(rt - 1000 / fps));0 k, l0 g1 l i0 P* V" X! A; x
- ctx.setDebugInfo("error", 0) X$ S& z6 j7 Z- [. i( c
- } catch (e) {
% @- @8 i/ s2 A s" j B% b1 ? - ctx.setDebugInfo("error", e);/ P" L- N: r e- O4 q
- }. S# Y1 L1 Z7 _+ }
- }
* I0 H+ P! Q9 F! n T - print("Thread end:" + id);
! c" H1 ]( t1 S+ W/ l7 ~ - }
6 ?" H6 g2 X! M `$ f - let th = new Thread(run, "qiehuan");
| Y' ^2 V w' `+ n - th.start();, {0 L+ n3 Y0 ~# d5 v" d
- }
; q0 k! n9 `0 a
: x4 G/ p: i; l$ A9 @- function render(ctx, state, entity) {
3 m! w- N" t0 d - state.f.tick();
, {0 ?* V0 N# {% [3 M. t1 R2 |1 t" P& H - }
2 v/ r x% ^: G2 h
+ p, q- A' M' S. J% t5 d& ?- function dispose(ctx, state, entity) {+ n0 R" Y; R$ m5 W
- print("Dispose");3 V8 q8 b: B1 |
- state.running = false;
?- [3 R, l" M, z. S ~ - state.f.close();5 v. S( }) b" y3 R' D. D* X, A
- }
# t& H) X0 M- x; w0 I/ `! o t - 4 Y9 w' P1 e( {
- function setComp(g, value) {0 k. B& s8 h$ i7 |4 I) k1 P
- g.setComposite(AlphaComposite.SrcOver.derive(value));
) d. O3 x; ~5 {; C0 ?; {( x6 `) _ - }
复制代码 ' s( v% A% g) ~/ A
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。: ?* X D6 f. k' P M
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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)
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