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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。
2 ^5 G4 z& s* T3 G3 {" l- importPackage (java.lang);
3 P" b1 y- u# O: X$ B - importPackage (java.awt);8 `! S( k4 u# y2 e C- `
- ( ~+ c& r6 g. R' M/ {* \
- include(Resources.id("mtrsteamloco:library/code/face.js"));
+ j' D% r/ X% N7 D# f5 E6 S0 ~. T
$ O8 u- Z U+ X- k. H j. c# S- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
2 M' C5 u+ p p
$ p: [$ m( [2 V! l! h' R% `" W- function getW(str, font) {; x" x p) H6 ~1 N4 }
- let frc = Resources.getFontRenderContext();2 n0 U, @. v' q0 P j7 j E
- bounds = font.getStringBounds(str, frc);
+ `4 c5 w, U/ f - return Math.ceil(bounds.getWidth());/ |$ o1 C8 B, \+ ^0 B: b% U+ ]
- }! H6 w& T8 J4 k8 q8 [' p
- 8 K; z' K4 c; d; V2 [: c8 ~
- da = (g) => {//底图绘制% H8 I4 ?( e; p* j# b6 t. `, \
- g.setColor(Color.BLACK);
1 O' w5 P, F! V! B4 q1 I& Q& d4 f2 ^ - g.fillRect(0, 0, 400, 400);
1 E- d; |' {8 L/ Y! A1 @- w0 R - }5 N& W! r0 m; f, {8 ?. Z% M
- . C# j8 X. T8 D$ P' X' T
- db = (g) => {//上层绘制
( p8 t3 l0 T/ [6 |( P) I5 @ - g.setColor(Color.WHITE);- U; s6 W3 M1 V$ |
- g.fillRect(0, 0, 400, 400);" T. X! F% ]* L E0 b% ]/ ? f
- g.setColor(Color.RED);
5 d' n% U4 X/ q8 x - g.setFont(font0);% h$ z* b" Z# m# M6 O& w$ e4 j0 m
- let str = "晴纱是男娘";
1 w, \3 ~% h5 H( e7 ^ - let ww = 400;
3 e% A3 J3 {: h% g/ a p- ~+ ^ - let w = getW(str, font0);3 @# A1 j% z3 D, i+ d
- g.drawString(str, ww / 2 - w / 2, 200);2 _; {: B! l$ t' Z! }7 m, i
- }. W& {2 ?, t, M
- & A- f; [! |* z1 Z
- const mat = new Matrices();4 B/ s2 _$ y" `9 z1 e3 b
- mat.translate(0, 0.5, 0);: w! G/ ~* J7 k f" X0 X
0 x/ B; k8 t4 A- function create(ctx, state, entity) {
4 o/ C6 R. N; D- l8 d - let info = {
5 a4 F4 H# C' C; D7 D, d) i) [# k - ctx: ctx,0 R3 d: i) T$ d4 Q# W; }1 k3 N
- isTrain: false,. ^2 O* f* Q" e' w( G
- matrices: [mat],
' T1 z0 b+ `( l% s) x$ q, B - texture: [400, 400],2 {! O, c1 m! I
- model: {$ M; ~+ ]3 Y) k3 u
- renderType: "light",. {0 J/ R5 W# ?5 ]5 \
- size: [1, 1],
0 W: k" Z; Z( ~) \ N - uvSize: [1, 1] t0 G3 S7 i C! b- F- {
- }
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- let f = new Face(info);/ q! b- u" g \* n4 |* Y
- state.f = f;
: v- K' f2 S a, |# v' B# S - ) a G* l9 K( G9 Q
- let t = f.texture;; u ^! }# y* |$ k' V
- let g = t.graphics;
i0 H1 b) q5 B0 O& w - state.running = true;
, w) v9 H* ~' q$ x* m! Q; q - let fps = 24;
! v+ X5 p3 P! J' P* {3 p6 _% v ^ - da(g);//绘制底图' Q j3 x# Q' ~- A: S/ t$ S
- t.upload();$ p2 @5 _: B: U* h$ a6 E
- let k = 0;
; ?# C+ t) R1 F9 f$ ` - let ti = Date.now();
' s* O* c" |4 F( m2 P" k% |( C7 A - let rt = 0;
. K$ i- ?5 d! Y9 _: Q$ z" r - smooth = (k, v) => {// 平滑变化
( C9 I+ Q- Z# A1 u - if (v > k) return k;) c" ^, b( W4 y& N1 n6 s
- if (k < 0) return 0;- n. S5 C/ U; `2 c# a4 [7 [' |/ _" W
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
7 Z: l4 y9 H) E, o3 @ - }
+ l* B7 O0 k& P- Z - run = () => {// 新线程
6 o7 K+ ]9 Y" N+ |" F - let id = Thread.currentThread().getId();, ?6 M/ b2 r+ w1 ^5 I1 n0 t
- print("Thread start:" + id);# E% h$ r: I' }2 {
- while (state.running) {
! n7 j* D# _2 m) u- d5 B - try {
% X( O" H3 V7 ^% Q! G. l# `0 X' b - k += (Date.now() - ti) / 1000 * 0.2;
4 M( a+ \' \# O7 p7 C; G5 M4 o - ti = Date.now();2 n5 t3 f( t: Y( v8 V
- if (k > 1.5) {% Q8 o" ]! l+ x
- k = 0;
6 q3 p' U/ V: ?5 ]4 | - }
+ y% E- y, e; N+ K0 e$ O- N3 E - setComp(g, 1);
6 R5 u+ ~0 [7 }7 ~ - da(g);- Y1 u0 [" `" @3 t$ v1 u/ ^7 P
- let kk = smooth(1, k);//平滑切换透明度. i6 G0 h6 `0 v0 f
- setComp(g, kk);
) F# a: j7 J( L/ ~ - db(g);
6 c! g/ @3 w! W5 [ - t.upload();
0 Y$ x# Q( K' h `' }2 x. Y - ctx.setDebugInfo("rt" ,Date.now() - ti);& \& ^& N- c3 |' s& s9 ~
- ctx.setDebugInfo("k", k);- ]( h& ^5 z, \% J- N2 P% j0 T, C
- ctx.setDebugInfo("sm", kk);, i: K/ X0 G$ Q' A; T
- rt = Date.now() - ti;
: q( R) B8 j, |/ D) h7 S( I - Thread.sleep(ck(rt - 1000 / fps));: p3 `3 Z( p' \- G) D0 o2 i
- ctx.setDebugInfo("error", 0)
' \# ?; [& B1 ?* f( V' e: A/ B - } catch (e) {9 {& @3 b1 p+ y N' @6 u- h& X
- ctx.setDebugInfo("error", e);' y! O' r( }8 G0 o: H3 Z3 R
- }. w, [0 Q. S7 O
- }6 h9 E0 H# A! S' N4 r
- print("Thread end:" + id);8 p7 D" s: ~ H/ p# o
- }, }6 ~0 y0 X. c0 \ [1 B
- let th = new Thread(run, "qiehuan");
. @! i1 A7 j1 B+ f - th.start();
& A2 V& }- u9 y4 u" e( t - }0 |2 Z* O5 c0 n- `- C5 K
; I6 t5 s8 g9 H* D- function render(ctx, state, entity) {
0 k% M3 I3 h: O% M - state.f.tick();- }3 U0 [6 l! Z5 p- [* S) S/ v" k
- }
6 `1 ~# h c& ?' ^
' |7 n1 R7 W6 S- function dispose(ctx, state, entity) {
0 _ H7 |% w9 E1 E* S0 @ - print("Dispose");% T6 x' ?2 D3 a# r
- state.running = false;- O+ M3 C# o( l! ^$ I
- state.f.close();
6 W3 p4 p* v2 q s- k% m - }
7 ?: R6 d) m1 m: L" S V9 H$ c- ]
3 G1 S% Z5 T* C- function setComp(g, value) {
) |) Y2 K( V1 D: l$ T+ v - g.setComposite(AlphaComposite.SrcOver.derive(value));* p* @, h) Q6 H( h, h" `
- }
复制代码
" q$ Q E5 H- z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。
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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)- v( _0 Z- o* z1 A0 b
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