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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 H, e3 K, P. L* x
- importPackage (java.lang);% B" j- I& a* T$ t
- importPackage (java.awt);$ [% o/ @& V8 c/ _6 F
- 7 N# P3 E8 `- W2 e) r
- include(Resources.id("mtrsteamloco:library/code/face.js"));# T* v! T0 a) {0 I
- ; ?; f6 S% ~. {9 x5 v& S) D& n
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% Z3 X8 X. y( @8 M- ^2 }
& Y6 W2 o# v2 [2 j5 K- function getW(str, font) {
9 [0 A$ C6 }- C% r - let frc = Resources.getFontRenderContext();: D% C$ d* s3 L: A6 r0 l2 N/ K6 H
- bounds = font.getStringBounds(str, frc);
3 [/ L' C8 s5 E. b }4 k: [$ G - return Math.ceil(bounds.getWidth());
7 Y' ]; e8 v* u& J' P9 R k3 o - }
# D$ A' Q9 h0 v. V
; {/ e0 W3 u$ Z( f& O, C- da = (g) => {//底图绘制; B( } @( m9 f) x: c1 t
- g.setColor(Color.BLACK);
$ A# d/ u4 q1 H - g.fillRect(0, 0, 400, 400);
5 ]! C* D: @& ^) C$ K/ X, ] - }9 S9 z1 d' d& y
# S, f/ @$ c( l8 i3 t/ H- db = (g) => {//上层绘制
$ x4 l! A: }* K* s8 W) i - g.setColor(Color.WHITE);
( ?3 V) |3 e3 R! h2 ? - g.fillRect(0, 0, 400, 400);0 J+ [% Y+ }7 M, d6 ^
- g.setColor(Color.RED);
) B" A- A$ p4 C - g.setFont(font0);
3 v8 I! u: A( o1 X: o0 q$ L! s) v4 ]6 u - let str = "晴纱是男娘";. V% F: W5 m( @+ E( k, J) K! k6 I
- let ww = 400;
7 [2 q0 o, k% k! v" ?+ m - let w = getW(str, font0);7 P! x( M, u& L5 z e6 Y- f
- g.drawString(str, ww / 2 - w / 2, 200);8 V7 ~" S8 L# m5 o
- }5 U( D! N. `& {- b% A
- 8 U$ G" d/ _$ z2 N* R0 ?" g, m
- const mat = new Matrices();' p8 B( X; S$ R Y# ^" l
- mat.translate(0, 0.5, 0);8 g9 F! h0 M6 D
& C2 Y3 |. J0 i% f8 v, \0 `! L- function create(ctx, state, entity) {
$ s5 L4 \. j( w7 x+ q5 V6 ]% K4 ~- W - let info = {
7 H4 z! p* v" L$ X1 [; v - ctx: ctx,
! G& v* Q4 f& L - isTrain: false,8 L# D0 ]$ d/ c- M! E2 i
- matrices: [mat],0 \- H5 g" \# x8 U6 O
- texture: [400, 400],1 i) m; i! c6 L. C: H' c7 [
- model: {
- k* f# [' m* T! W0 z - renderType: "light",
7 I/ i- K' u0 G K* B - size: [1, 1],' n- G& d- u6 H: M3 [; W. J
- uvSize: [1, 1]+ M. _* i. K7 `9 c! W
- }* C$ s t$ N; T% h8 r
- }
6 x/ o1 K+ Q+ v1 l) h) i - let f = new Face(info);6 O5 W9 w. g/ G$ `5 a0 @$ i# j
- state.f = f;# c& @" R% ]6 ~
# p5 N/ m( t( ?* D0 m9 w6 X$ j- let t = f.texture;
/ x) \! l& A4 B1 X) S" u% Q6 Q4 S: M - let g = t.graphics;1 {7 h/ q i" n& M' P: C
- state.running = true;
. ^% T9 T5 m ?( E: K" |8 ? - let fps = 24;
/ Z# Q" C2 d# }* N9 I - da(g);//绘制底图
5 ?5 }9 a) m; w1 S! e* A7 q9 ~6 b+ r - t.upload();
/ a' ~6 l0 [! C- } - let k = 0; Q; B8 p/ V# J( |' s! e
- let ti = Date.now();( h6 p) x+ q! |4 u3 i7 X
- let rt = 0;
. K( g7 c5 U, v- G9 |4 i6 t$ e) N3 w - smooth = (k, v) => {// 平滑变化+ z6 T+ S5 Z9 i
- if (v > k) return k;' o' X% I C* Z( n8 ^9 Z
- if (k < 0) return 0;
0 q# T: R1 z" ^# H6 ` - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- c; p- p! f0 l0 X
- }
7 y- U: a- T! i! e/ V; V7 o - run = () => {// 新线程
9 R3 s2 r$ o! Y - let id = Thread.currentThread().getId();
, | m7 \! u$ @3 o% _8 L9 Z - print("Thread start:" + id);+ y& q# L2 a# N" \1 O; V i$ G
- while (state.running) {
( o8 b: f2 i5 F2 i7 Q; [0 {1 ~ - try {9 x1 F2 Q& z- |
- k += (Date.now() - ti) / 1000 * 0.2;
- h4 \# o; E: L* } a - ti = Date.now();0 e ~$ {" g$ H3 {' V
- if (k > 1.5) {
, a- O& g2 Y, P; m1 } - k = 0;! Y0 a w. ?+ w
- }
1 q, _/ j8 K) ?$ C L1 ` - setComp(g, 1);
8 ?+ s' W( v3 d) W$ y6 c - da(g);0 |, i7 L& ]- U* I- p3 O. [
- let kk = smooth(1, k);//平滑切换透明度
( X, B' ?; d8 i0 o7 _3 X - setComp(g, kk);
3 ~( t. W K* b1 t - db(g);0 k. z. v) Y+ u; W
- t.upload();
d; s" c. D% I4 j: h5 f2 n - ctx.setDebugInfo("rt" ,Date.now() - ti);# C* z- B) x' }, o! e& m+ Q; B; M' F
- ctx.setDebugInfo("k", k);
$ p; \" D# Q$ u3 I - ctx.setDebugInfo("sm", kk);
: j' F, L% k* W1 @" O - rt = Date.now() - ti;
- ^9 [( z) l6 E* _7 _, | - Thread.sleep(ck(rt - 1000 / fps));% |$ A1 D/ S, L( k9 @ E4 `; ]* a6 v
- ctx.setDebugInfo("error", 0)1 y3 \! f. W' i' [: e
- } catch (e) {
' P3 S1 S" [8 `6 |) A0 O( H - ctx.setDebugInfo("error", e);
( H+ e2 A$ }" X - }
* Q! Z2 d4 Q$ ?$ M - }
! h! i! I5 y) k9 O$ Y4 v - print("Thread end:" + id);- y2 R1 X B' n* E% @% Y
- }+ R$ S2 l1 y# V& t6 @' H
- let th = new Thread(run, "qiehuan");1 |+ |2 v2 |* O/ L' `
- th.start();
- G* ~' {: j5 S; O& [' f, A - }
/ c, n8 ]# r. j. U- M$ v* j - ! A& u# S3 n! X
- function render(ctx, state, entity) {
! r1 p3 B h9 r7 A# g+ D - state.f.tick();
# [0 ~1 Q* S( i2 q. y( x - }* B3 }; E1 i) K g; d' K4 P. F
% m8 j% n4 {* _7 @; R- function dispose(ctx, state, entity) { D3 S! o2 M4 f, T4 \7 v
- print("Dispose");
4 }3 ?$ y; ^3 M O# p. ? - state.running = false;
+ J* b0 ?3 l* Z- ` - state.f.close();
W5 i! S1 I$ T; M - }# V6 o4 Z ^8 u' ^0 h8 r+ U
, B2 D& M- z/ v1 ~# x6 H- function setComp(g, value) {) ]2 `. {9 Z3 n+ C4 @) l4 H
- g.setComposite(AlphaComposite.SrcOver.derive(value));$ X3 h1 o( k" z/ \( q+ |- \4 n, X
- }
复制代码 . `$ R, u* p" w5 O
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。' t! s) q2 Q; _& c$ H, G
! m. Q2 X6 m! m6 O8 y
6 R4 `' d" Q0 B4 j# R顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)8 r' \( L2 t9 N5 E/ ?+ C5 i
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