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$ f5 x. s% J: M; g, C1 Z9 \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。
, ~1 F' y% [2 Q% O- importPackage (java.lang);' Q7 @2 O. u, Q) I
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
+ a z( [" m7 }- q$ Z' S
+ [/ _( f) P2 N- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);) g S8 {; P; h% ?) z: U# u, D
- : u0 W ^7 p) ]
- function getW(str, font) {
+ D, g8 s" S3 A2 K( h- Y+ V - let frc = Resources.getFontRenderContext();
/ n+ q8 a# u8 ^6 R. }5 B - bounds = font.getStringBounds(str, frc);" M( f; \# U1 v2 V. Q8 h! R1 A5 t
- return Math.ceil(bounds.getWidth());
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- . O# P' e4 N% Z" T0 o/ ^
- da = (g) => {//底图绘制2 I6 [2 N l- x% e& M- E5 Z4 w
- g.setColor(Color.BLACK);, I% a8 A6 i) {& `1 A0 Z
- g.fillRect(0, 0, 400, 400);
+ i) }, K% E6 m1 n - }
2 N/ C. t/ M0 V( B/ b - . U2 i3 Q7 Y6 y# B" y- P3 s; E
- db = (g) => {//上层绘制
# q5 T9 L( v" D b; V Z; y0 a - g.setColor(Color.WHITE);* d, h* A$ y6 s; Y
- g.fillRect(0, 0, 400, 400);
& Y4 i7 h5 S! j* B - g.setColor(Color.RED);* D" x2 A0 Q0 J2 F' [
- g.setFont(font0);
1 B) M+ j* }8 w$ C7 N8 s - let str = "晴纱是男娘";
; f$ ], X3 e/ O* ?4 d2 C8 k - let ww = 400;8 w8 g! V' H1 |" p* N# `# z: o
- let w = getW(str, font0);6 N9 z8 l. F0 z! O4 g6 Z; h
- g.drawString(str, ww / 2 - w / 2, 200);
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( h: W% B7 s0 h- E. Q- d- const mat = new Matrices();8 J: N* n1 I! m9 o( Z' G3 |4 e% R
- mat.translate(0, 0.5, 0);! m+ S: }7 V: J5 q
- 1 [; T- v+ ~! x$ k. @
- function create(ctx, state, entity) {: k5 s( o2 g) u
- let info = {6 x: V: g j" l
- ctx: ctx,
6 @( ^! G2 {, Q% }" x/ r& i& V - isTrain: false,& j1 s/ B, g$ g" n. n/ S
- matrices: [mat],/ C7 F& P2 ~% d: W) C: w4 E0 k1 d
- texture: [400, 400],
0 C1 _4 L) K( R/ ^; I8 l& H6 B - model: {
$ @# ~( L& A! w" o - renderType: "light",
6 g$ [0 C: V, w" G. y9 c! J - size: [1, 1],' _. |" r4 S$ F# P% \1 P
- uvSize: [1, 1]
0 T! E9 _0 c9 i% s: F7 e2 G7 j: u - }
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- let f = new Face(info);2 Q) y: q" x! F/ u; u! X
- state.f = f;
% c+ r, Q7 r4 b
) {- G5 l0 x/ E% G V1 A7 f+ V( O- let t = f.texture;
% y% N# |0 B6 p5 z, s - let g = t.graphics;
8 h& c2 e- V: e* o' I- A - state.running = true;. B& @' D( n: N4 {( B0 ~, N
- let fps = 24;
0 B7 n( Q4 v! Z# l, v - da(g);//绘制底图: I: d4 S- m3 N) q% m
- t.upload();
( R. E5 s# R+ R+ J; m. _4 \5 G - let k = 0;
+ m+ l6 E' l J; D2 F0 w - let ti = Date.now(); {4 J2 ~5 V: X, c! B N" i0 o
- let rt = 0;% _3 J% b4 `: c4 S
- smooth = (k, v) => {// 平滑变化. k6 B- F. q2 W4 F% t0 l
- if (v > k) return k;; R9 o1 |- _& k% v% E
- if (k < 0) return 0;" v: @" N& _ t# X, c& f
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
: k7 }, ^1 d7 I! W) z& W% S - }# e0 s7 q6 M: k1 O- d
- run = () => {// 新线程4 P. o0 U# n: N! x6 T! F
- let id = Thread.currentThread().getId();; V* a# M) a# c
- print("Thread start:" + id);( B; P1 @1 n$ h4 d* {6 |' D/ x
- while (state.running) {
: Z: Z' s, X7 V2 b - try {2 U# q+ r0 ]' {0 W& L8 v* Q3 _
- k += (Date.now() - ti) / 1000 * 0.2;: s. o8 V% H1 n* q r7 U8 L6 X
- ti = Date.now();, R3 s' B: k$ D% l" Y5 E8 I" Y
- if (k > 1.5) {
@- q1 A) j E8 P2 [; k4 T+ I# e - k = 0;) _0 F( l" g$ L! u4 T
- }
: N( T3 D7 `( s" {" X }& D - setComp(g, 1);
- `0 c* [: L' u3 m" {7 u( w0 {8 f - da(g);1 G% S; K, _* P
- let kk = smooth(1, k);//平滑切换透明度
7 a* v. z; W6 B g, u9 { - setComp(g, kk);
) b) b* {6 j0 o# t9 C% o - db(g);
9 [6 O! s) H) r ~ - t.upload();
/ l* c; A7 d) y7 O4 R. { - ctx.setDebugInfo("rt" ,Date.now() - ti);
7 J3 u, B# v6 Y% I0 p$ K4 o( R1 h - ctx.setDebugInfo("k", k);
& n7 U% x, x- T9 g6 P" ^ - ctx.setDebugInfo("sm", kk);
# a6 W6 S/ R! B4 K. L - rt = Date.now() - ti;
) @. A" q6 R) @$ E2 c9 s - Thread.sleep(ck(rt - 1000 / fps));
* N! N3 s. s) s7 f( a+ x - ctx.setDebugInfo("error", 0)
: i i2 f- X' C - } catch (e) {; A& n- }* }7 W! c, x
- ctx.setDebugInfo("error", e);
- o* V8 O; N4 J* h* X( b" r$ `: j - }; P; u& W1 n' y4 j8 j& G- S1 y5 Y) k
- }- Y* s5 }$ y0 C$ [4 m
- print("Thread end:" + id);: x: \' ^! r( V8 g2 \
- }+ r' O& I* A+ h; @4 [
- let th = new Thread(run, "qiehuan");1 `& B; q4 u; @& P
- th.start();- ~' V) E, C, C# S4 ?4 n7 B
- }
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- function render(ctx, state, entity) {
# Y. x) q) C% K- l - state.f.tick();+ n+ l/ \6 x# ?2 q' Y9 V! r# P' j
- }
; W9 ]! A2 l, U
" Z$ G- g0 o# _2 g$ B( g# T- function dispose(ctx, state, entity) {
; O7 l4 S: P( F5 S; p - print("Dispose");
' c* ^. c( y! Z0 R& u: j - state.running = false;! J7 K+ C4 L+ B G
- state.f.close();+ V# [& r0 A7 ?/ C# V5 m- |
- }
' H1 z4 x: j9 e( F! Z+ B5 s
( _9 m. c5 ?/ F* x- t o" t- function setComp(g, value) {
/ b7 R! F* m3 `0 |/ Y$ z - g.setComposite(AlphaComposite.SrcOver.derive(value));
: C; [/ c( L8 }) O# a - }
复制代码 . t" b& S( S3 K6 E, q; x
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。' Y$ i; I' H9 n" T
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7 { z4 T" @; z; z$ a# y+ 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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