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! W8 e& n2 Z1 D9 R' ^7 f5 n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。
, O; W' h+ S% L( J- importPackage (java.lang);
4 q: X% N) u" R. h: L - importPackage (java.awt);7 y4 g0 l2 W2 n: X
' d) z: p' Q1 Q9 h- D2 C% R- include(Resources.id("mtrsteamloco:library/code/face.js"));
# r4 n, }1 m: f$ P) O! X! m9 O - " T$ C: ]. a: M6 M. L' S, u
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); m, K* o- [+ C3 J3 N% S
" j9 n- T7 \; q' `' g- function getW(str, font) { v( _3 H, C, f* @, b! U) l
- let frc = Resources.getFontRenderContext();
/ ^$ l8 J' u/ _7 O6 ? - bounds = font.getStringBounds(str, frc);
2 m; v8 E K" R6 S - return Math.ceil(bounds.getWidth());
. @' V0 O! u- C% G( @9 p; C - }8 a5 o* e$ h$ s2 d0 J7 x4 f
5 W1 G2 H# ?9 M' `2 h+ o1 K' k- da = (g) => {//底图绘制4 Z$ ~4 u! h( b* I6 y1 v: [8 Y% w6 b
- g.setColor(Color.BLACK);9 e7 n8 _( y4 R$ P9 Z! I3 R+ _
- g.fillRect(0, 0, 400, 400);
4 d. F+ o. c! I# P* K* t. ~ - }( v* V8 V7 Y$ E. S0 M6 a: P# [0 E9 i
) u( b/ Q7 S7 `$ u- db = (g) => {//上层绘制# u5 {3 [ k' Q
- g.setColor(Color.WHITE);- y- |8 e6 x0 n: L4 \
- g.fillRect(0, 0, 400, 400);
5 s- _( ~. N+ b) j - g.setColor(Color.RED);
/ O5 f: y" t6 ~3 u* }! B6 h - g.setFont(font0);1 y0 y. O y4 c' m* Q7 W
- let str = "晴纱是男娘";
% _! @# m( ]' A% n9 v. [. d* f - let ww = 400;4 c+ K/ M! B, e. }% [( I7 f/ X
- let w = getW(str, font0);! ?6 e* a& Y# o" e9 V
- g.drawString(str, ww / 2 - w / 2, 200);) K* f' g4 S' q
- }" d/ i5 ]/ X, e; h1 E3 F9 L) l
) e% H/ Y( }+ |1 s2 ?! i/ M- const mat = new Matrices();7 @* @+ a& z$ i4 f
- mat.translate(0, 0.5, 0);, t" _/ T! ~- A. g8 J4 \3 B
+ B5 v5 J4 d6 ]6 M# v# J5 p( Y- function create(ctx, state, entity) {* \& \, e. C+ ^% C
- let info = {
# W( L- X! k" T- F5 r* I& d; l/ u - ctx: ctx,7 w/ s0 h" k- ]4 {$ q* l5 F o
- isTrain: false,
* }/ u K" P% M4 O - matrices: [mat],0 W0 z5 n6 q! J7 g
- texture: [400, 400],7 E$ y; e1 y5 J
- model: {
5 U2 d) y' F$ n5 |0 \ - renderType: "light",
: M, j* e$ t8 i0 b' K8 R7 j' f' n - size: [1, 1],
/ z. E! W, Z7 o; v2 q - uvSize: [1, 1]
* ^6 p9 o2 @+ ]8 z# Y - }
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- let f = new Face(info);
2 [! A8 ~. V; Q2 k3 I r - state.f = f;
4 T7 W; N& Y8 l6 C! J+ A
6 B+ S, {! H3 }1 M( i- let t = f.texture;
6 }8 T0 m; a3 m1 U. d0 W" R4 Z - let g = t.graphics;
S) m5 E5 v- K4 ?0 | - state.running = true;; {2 v5 R9 [& v/ {+ c; m
- let fps = 24;) b/ }' C" L. S7 D
- da(g);//绘制底图
$ S$ o" j# Q1 Y" {, k0 E - t.upload();$ i& E" ?" e6 w9 M
- let k = 0;2 V' X6 ~# F% ]8 q+ z4 B7 v* u
- let ti = Date.now();
4 ?1 g. v5 \2 J& K3 Q# e* Y - let rt = 0;: y/ a: C# t' G# s
- smooth = (k, v) => {// 平滑变化
* V% ?" B% v6 z0 F( E - if (v > k) return k;
6 G: ^9 Q' H+ R8 J2 c7 X+ Y - if (k < 0) return 0;# ^: ^7 D6 o* b4 k7 S
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 b7 T! O5 N+ K, L3 a, M
- }+ p3 h* |8 Q8 C4 I& [3 S+ E% m5 M
- run = () => {// 新线程
( d% X$ n$ }) {! d/ z j! S* ? - let id = Thread.currentThread().getId();
9 f) Y! j* N9 _' b8 G% | - print("Thread start:" + id);
6 \( H- I& l( F7 g6 L/ Z$ L - while (state.running) {
8 W, w0 ^$ V# l3 j& h - try {
* w% o1 M9 z, Y- ^/ C - k += (Date.now() - ti) / 1000 * 0.2;
" l! ~) w; V/ r) g2 t7 c. C% E) B0 u. L - ti = Date.now();; h- b' ^! v2 S1 w+ A+ f J
- if (k > 1.5) {+ Q2 r% G% U1 g; b# R* d4 }& W
- k = 0;5 ~- y% T, k( ?1 }
- }
5 w. U" P4 q8 ?0 Z6 {3 \ - setComp(g, 1);
6 f# a( N4 t# p7 O+ V - da(g);6 G/ m }2 T. v0 w9 j3 Y) F- w: y
- let kk = smooth(1, k);//平滑切换透明度
4 s' M j3 @/ P$ I. W! u - setComp(g, kk);3 ^$ S' v$ I# {
- db(g);
) b) h' G* ~3 m- ?* R) g - t.upload();
0 D6 l% m% V6 F8 R, f+ _ - ctx.setDebugInfo("rt" ,Date.now() - ti);" K6 n2 X( B( s- x1 w
- ctx.setDebugInfo("k", k);# X5 E: X% M1 e0 ~* }$ N# K
- ctx.setDebugInfo("sm", kk);
% z/ `) Q5 V: G - rt = Date.now() - ti;1 P4 c+ Q* H: X) y3 C
- Thread.sleep(ck(rt - 1000 / fps));
9 ~6 v% _1 O/ @8 K6 ] t9 I6 | t( v - ctx.setDebugInfo("error", 0)
4 U$ b; o9 F3 M) \0 p - } catch (e) {
5 u" w8 ~; B9 J( H2 u - ctx.setDebugInfo("error", e);& `3 p/ Y8 o5 ~. P# R* @
- }
$ E# ]/ C9 Q' U' R2 X3 o - }9 u( ~ g( a c& G* T; Q4 y% s3 T
- print("Thread end:" + id);! g- c: {, b. s* V1 q p7 v9 _$ b
- }# u4 w' n2 ^3 B
- let th = new Thread(run, "qiehuan");
% p' ~9 [& ~7 Y J1 i - th.start();2 h/ A) C6 ^* c* i. P& W" w
- }
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- function render(ctx, state, entity) {
4 E- v! X, z5 |2 ?# C( d( ` - state.f.tick();
8 g/ H7 A$ y2 r - }8 x% H: @7 {& X
- % ^% F5 X: w: ]4 t9 I
- function dispose(ctx, state, entity) {
& n3 T6 ~. q( h+ V1 N. u2 f - print("Dispose");% l0 a% \9 H. [1 q3 [0 Y2 Q. q
- state.running = false;
a' Z+ r3 H/ F ^2 ?" y& A - state.f.close();" I9 p2 {; |- d2 Q9 f' J
- }5 X+ U. G9 d+ X7 v+ B' ~3 ^
- ( j% o2 N) K% r5 f7 f$ F
- function setComp(g, value) {& z& y1 D! h h. P! S5 T
- g.setComposite(AlphaComposite.SrcOver.derive(value));
# J. e- g3 x) T' ]% G3 P" j - }
复制代码
# R" `( u ?+ A* \1 F- s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。; Z6 w. T! I" }, ^9 Z9 z/ U
# V4 U2 A/ J& w
0 Q" p% M/ S' ]3 T: Y! O, 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)7 _. a2 L+ n1 B- S2 K9 P
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