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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。
# O. `. Y- x5 o4 i) O- importPackage (java.lang);0 V3 d4 S {* ]. b" `
- importPackage (java.awt);4 I* O) x3 r4 ]+ C
- 5 b* M% G' e, c0 A. b; [& H$ Q
- include(Resources.id("mtrsteamloco:library/code/face.js"));
# [- G" X9 M/ N+ S6 ? - " w3 B @ b# q4 _4 c% n0 g
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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' p6 O, w) M8 c- q: |/ X- function getW(str, font) {
2 ^! k8 {# H. z- V3 ` - let frc = Resources.getFontRenderContext();0 w4 p: t0 ?; R j% [
- bounds = font.getStringBounds(str, frc);- P6 O; B" Y z/ A2 C
- return Math.ceil(bounds.getWidth());
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- + S, k- d& `# S6 I0 @' O/ H
- da = (g) => {//底图绘制2 o. j5 A1 W) s( q# ^& w
- g.setColor(Color.BLACK);4 m: v6 o5 J7 @- [: y
- g.fillRect(0, 0, 400, 400);
0 T6 p. u H" Z& k Z, Q7 c - }2 V0 I/ k( P% Q
- 8 V( y! z3 R0 J4 s3 D9 B# ?# V9 N
- db = (g) => {//上层绘制
& o/ x+ B- F% k; Y& S - g.setColor(Color.WHITE);% a: i6 r3 ^& C% ]% K
- g.fillRect(0, 0, 400, 400);+ [% R1 S9 O5 T! I, c
- g.setColor(Color.RED);5 p, \9 P) n s7 h/ W. |; X7 X
- g.setFont(font0);9 i* ^9 y+ V' u
- let str = "晴纱是男娘";9 u) N, G: P& n% }
- let ww = 400;
s8 U: N" G/ w3 Y& R* @ - let w = getW(str, font0);
1 s) Y! s% V% H* A# e" F. _ - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices(); @( g/ a! _) @
- mat.translate(0, 0.5, 0);
+ \* N* U, Q. N& f" V - ' S' D3 H# D. |# T4 h s8 t
- function create(ctx, state, entity) {! J# P; v4 I8 \% I/ a3 d9 r
- let info = {
# b4 {4 ?6 E1 j4 p; w; Q4 Y - ctx: ctx,
5 }% p' M- G/ U) c4 [8 S a2 R - isTrain: false,
" Q a" _8 d B: p - matrices: [mat],6 n- f) X# A, B* B
- texture: [400, 400],
7 |- G+ o0 |) D. d! y6 E - model: {& Q2 d! K( D) n! {% w3 M, e
- renderType: "light",- ?( t) R6 m' @ ~9 z
- size: [1, 1],
7 k% _0 I" x8 G+ Z7 c( ` - uvSize: [1, 1]
/ p/ W* R7 h0 Z' E6 ?4 [ - }* S+ z/ J* j& `9 E, Y% P6 C" |
- }
/ h& v3 {# A5 g9 N2 w+ A+ b1 r; c0 X - let f = new Face(info);
5 k! i& c# U2 {& I, J - state.f = f;. m% `* ?: q( i% Z
- 3 U5 S3 b5 M0 {% \/ v
- let t = f.texture;' W1 j5 f8 E, f# @) E9 o. J
- let g = t.graphics;
9 g( h4 `- s8 |5 q9 B+ U+ ` - state.running = true;- t3 v; k2 W6 W! J
- let fps = 24;
4 o: Q/ W- d* L: f8 g8 H8 p: o9 b - da(g);//绘制底图
# U' q) e" c* X r - t.upload();( ]/ s3 {6 G3 z& m0 h% P
- let k = 0;
- }+ S% P. N6 _6 r P2 a - let ti = Date.now();" Z- q2 L) D! f# T3 |9 e1 `
- let rt = 0;- q- a' I$ a. q2 c
- smooth = (k, v) => {// 平滑变化# P4 L V( d1 u9 X0 Z+ w
- if (v > k) return k;
7 e7 O9 c P4 |/ r8 r% T+ L - if (k < 0) return 0;+ N' u7 o3 f9 c5 q0 d- r9 `
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
G% T1 w; |# \7 E# H. P* U - }% a, o3 H; F; o9 q" b
- run = () => {// 新线程
9 [6 \* {; K; Z! [& C5 ~0 b' t - let id = Thread.currentThread().getId();
( q& K9 { {; I" s( u \8 Q" o - print("Thread start:" + id);7 Q7 t, y" M* G0 b z6 I
- while (state.running) {9 S0 ^) o6 y+ c5 N4 m! M9 f; t" r
- try {
1 m5 [2 x4 g9 p - k += (Date.now() - ti) / 1000 * 0.2;, G, m, t. ~# }. @# d" _6 s0 c
- ti = Date.now();+ f2 v2 q( [7 k0 ^/ m1 Q
- if (k > 1.5) {
! u T8 R4 c, a9 n9 g - k = 0; ]6 Z2 w8 P3 G* t
- }7 ~# B' V4 [* u9 h& l. u, [* y
- setComp(g, 1);& ~# p* x1 u# G& I( `: b; |
- da(g);& K; ?1 o# |$ n2 A
- let kk = smooth(1, k);//平滑切换透明度
5 b3 \# N, b- X% M% m$ _1 u3 f* L - setComp(g, kk);2 v, k$ W5 V: ~+ v0 U( N
- db(g);8 Z8 D' M8 u3 e
- t.upload();# ^& g% ?, R, I4 f
- ctx.setDebugInfo("rt" ,Date.now() - ti);# n9 ~% z/ ^) K: l$ m% w4 `
- ctx.setDebugInfo("k", k);
4 v+ b5 d0 N9 k8 \ _5 x - ctx.setDebugInfo("sm", kk);2 h9 t3 e* @# G; \
- rt = Date.now() - ti;
7 Z# G0 a, ^6 D' s - Thread.sleep(ck(rt - 1000 / fps));3 b! k& c2 _: D2 c
- ctx.setDebugInfo("error", 0)4 h3 x, t' U( E
- } catch (e) {+ q" O' [0 P0 N- W+ G
- ctx.setDebugInfo("error", e);
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- }- j/ C5 S5 j* b# [+ n% n. X
- print("Thread end:" + id);6 F2 S5 l1 G) \/ Y9 P& w
- }% R- Y. \. K7 @5 {7 x! g6 N& S
- let th = new Thread(run, "qiehuan");5 k' X8 ~0 r) p+ s0 i
- th.start();
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- ' B/ R' I, l% D) c V* j
- function render(ctx, state, entity) {" K- r, ]: K6 T. K$ B3 t1 I
- state.f.tick();
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- % A3 W/ s1 K& O' X8 e* R3 V/ V- P
- function dispose(ctx, state, entity) {. V% w: Q7 n0 q" @2 q' C, v# `
- print("Dispose");
+ K6 q) x; Q) [$ D: S - state.running = false;1 E" S; u. }" I# x
- state.f.close();
3 J* ^/ W, v* ?9 w+ S - }
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E4 `4 W2 P% K- function setComp(g, value) {
: V$ S3 P- X: D0 y" P+ f - g.setComposite(AlphaComposite.SrcOver.derive(value));
9 E" r2 A3 Y& e6 b - }
复制代码 % I0 J! C3 o, h
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。$ e' N: t6 \2 I2 j- Q
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9 d% j& \) r. O) i0 \* ?- E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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