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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。 [) J$ s: ]" A1 m2 l
- importPackage (java.lang);
R4 [1 q+ x( A. y9 @3 \3 l6 l3 b/ Q - importPackage (java.awt);
" v) }: M+ |* g# |: @0 k - + ~* w# j& c+ T3 T4 A2 {
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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" T8 |; B2 R1 v# l- c' l" \( U- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);' z' @6 {5 b, C
( ~- Q" N! L: u! C( x _- function getW(str, font) {2 Z; b8 @# j/ ?2 B# a5 n$ G+ t
- let frc = Resources.getFontRenderContext();
' U4 F5 G7 k$ S( @0 W2 v' t+ F( i( `- I - bounds = font.getStringBounds(str, frc);( L. A; L/ a* e6 d4 B! V1 I) G
- return Math.ceil(bounds.getWidth());
* T5 ^5 F3 M; X* A5 c' Z4 G) L - }* h; k" U5 C* {1 p7 U
. a8 K R1 \# W- B- da = (g) => {//底图绘制
( V: m' d( ~7 ^! |* N$ E- j - g.setColor(Color.BLACK);0 M8 o6 \+ r7 T ^- p" K+ z2 c
- g.fillRect(0, 0, 400, 400);* Q8 J8 x j) t- [
- }
$ C" v: [% @* e$ g - ) C, v3 w( N; J1 ^: N
- db = (g) => {//上层绘制2 T' w3 |& S5 m
- g.setColor(Color.WHITE);
7 m4 d* G* P5 Y - g.fillRect(0, 0, 400, 400);
$ T9 X: m* c, e! d0 k9 B4 } - g.setColor(Color.RED);
3 ?7 n7 e, d, B - g.setFont(font0);8 g0 |, U+ S1 q+ N
- let str = "晴纱是男娘";
+ v7 f6 o; _9 z9 } - let ww = 400;6 L3 m. ?2 P' w- o
- let w = getW(str, font0);
( t' `0 i4 u! r; z% _ - g.drawString(str, ww / 2 - w / 2, 200);, l1 Y7 b$ X3 d3 ~! D7 w+ [: d
- }
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- const mat = new Matrices();
3 I$ S1 o4 C9 L [ - mat.translate(0, 0.5, 0);4 ?0 g# p- c! y: B5 j9 A
- : r, |* B3 A( S% p& x
- function create(ctx, state, entity) {* F! q8 {+ ~' Y! J
- let info = {
8 t2 h+ [$ @* H: A$ b - ctx: ctx,/ L# T K1 y( A. s. V
- isTrain: false,/ d% i5 U" h7 ?. J
- matrices: [mat],
* ~' V$ [) d' x U- R7 V9 ? - texture: [400, 400],
: O* e; ]( u3 V& I+ Z% [ - model: {
# C& _& O+ M. {! U, p& D% d; A - renderType: "light",
d. @$ V" {4 i1 R3 {6 ] - size: [1, 1],* _/ `" S+ w( j& X( V
- uvSize: [1, 1]# c- K# M* c& M) N' z2 m" W
- }! y9 t2 M8 @, J5 d: m# v! {1 ?6 g
- }
6 Q( D0 ^4 r5 o" ^6 G% v: R+ x% x - let f = new Face(info);
! t! W' J4 E1 d# u- x& Q; X. ~ - state.f = f;
+ e' k1 J7 A1 Q" b# A8 D
( r' y* N# S$ W/ B0 w3 w- let t = f.texture;
0 h( L5 H6 H" L$ d: S8 ~9 B' j - let g = t.graphics;+ j$ D e' n7 L2 @0 a! I8 t. l
- state.running = true;
) u9 I$ W% T, \$ \ - let fps = 24;
2 z4 ~: e4 f% k! d! x - da(g);//绘制底图
4 ?8 h8 d1 l' U8 q) t* L - t.upload();% T ^0 d' Z' z f1 d0 a3 h
- let k = 0;5 G1 n5 r/ ]) u7 D& [ J
- let ti = Date.now();6 h. g& }& p8 z& F
- let rt = 0;: E5 j, D! ?* U7 U' z2 H
- smooth = (k, v) => {// 平滑变化' ~8 B, ~6 A$ Y0 p$ R2 L( r# U
- if (v > k) return k;
( R5 @3 H, p0 R' r# N - if (k < 0) return 0;
7 d4 l" f8 G0 O/ i; @3 m9 O. ^" t7 g - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
# J. S5 `) O. j8 Y - }
$ m; t0 D0 I8 s" M) J! Y4 r7 ^ - run = () => {// 新线程6 z$ p( }5 S9 f, c" W3 y( d
- let id = Thread.currentThread().getId();+ e/ {- ~; U4 q
- print("Thread start:" + id);
: x/ G4 [ X# `9 R4 ? - while (state.running) {) E$ u) D% b8 X7 A0 n% `$ q/ g+ d
- try {
$ Y: x4 R2 _3 a+ L - k += (Date.now() - ti) / 1000 * 0.2;
5 K0 v# P& W0 ?3 }- v, N0 L- D0 E) L - ti = Date.now();5 x5 v M" N+ p6 `, V9 F. I5 F( U+ L
- if (k > 1.5) {9 E! N$ e/ r" F7 Q" `5 p& F
- k = 0;
& p2 L' @; w- o - }
% o; v" u( N3 @# V# R - setComp(g, 1);
9 Q# T- v- {+ ]/ x$ S - da(g);( }2 w4 @" }2 @4 h# T
- let kk = smooth(1, k);//平滑切换透明度% Q {) Q$ R5 |- v) K0 B
- setComp(g, kk);
3 n w+ S) X2 ?+ l, N - db(g);
) Y" \4 {* M: [! W- Y3 c) s - t.upload();
R: M B Y2 j" W5 q - ctx.setDebugInfo("rt" ,Date.now() - ti);
& d6 l: P0 \! q ?% v, q+ \ - ctx.setDebugInfo("k", k);
' H+ J# }4 c7 y - ctx.setDebugInfo("sm", kk);9 U$ Y# U* V7 V) c
- rt = Date.now() - ti;
5 C+ J) s. t$ G - Thread.sleep(ck(rt - 1000 / fps));4 J5 L( ]! H7 z* a8 ? U3 N
- ctx.setDebugInfo("error", 0)
1 R, v: ^5 @# T# |6 X& T, F - } catch (e) {) @/ @- X! L# Z' P" r O* B! U
- ctx.setDebugInfo("error", e);
3 B' u0 ~% i( y- h6 Q# y3 h3 V" n - }
8 I9 O# ?6 k8 d* L C+ P: ~ b - }
& h+ V1 F+ l; s1 S, d( ? - print("Thread end:" + id);9 C& l: y, E4 s( q
- }
' Y# [, T5 T. u1 l Y - let th = new Thread(run, "qiehuan");7 `' r a1 Q' J7 w4 l0 I# m" J
- th.start();
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4 t/ H8 \, x! D" u: i) f- function render(ctx, state, entity) {8 F- D, Q# C$ y/ y: l
- state.f.tick();
7 ^7 F- d* z5 a; } - }
0 ^+ h/ g" e; j' R/ x: E - % Z7 r; s+ x) V* ?- }
- function dispose(ctx, state, entity) {- N" `% z2 b2 U) m7 t: B
- print("Dispose");
) d5 l V) ?1 e2 {# y( I - state.running = false;
. |7 ^9 i* {2 J6 o - state.f.close();
; j6 ^; Z1 N; a; ` - }
0 J; m' \0 S: b' r
4 @" v- C9 j7 i. @& z1 p- function setComp(g, value) {
* ]7 P* n$ |5 k8 @/ @ - g.setComposite(AlphaComposite.SrcOver.derive(value));: T5 Y# J: F; }9 o- o' ~
- }
复制代码 9 D0 V! R# |9 C
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。
) b$ w+ C' M7 G1 {6 R+ W8 M9 ~9 I- _0 E# c$ ~# ^" ?, x0 e
+ j8 f6 I; e# c, E2 l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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