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6 g/ T/ q+ A8 |! M0 a6 h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。
* }4 r% f. f/ M) D( g. ^- importPackage (java.lang);
) I- o |4 q$ c! w4 v$ f, C, ^2 v - importPackage (java.awt);
+ z! \& {, ^$ N2 V - ! ]+ @5 w7 C: P) P* R
- include(Resources.id("mtrsteamloco:library/code/face.js"));0 C: l( Q* `2 `$ x
- 1 }+ g. }# T4 B, F/ x2 f/ D
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
4 \6 @) r0 B- s1 C4 d' e/ m1 d - ! t3 @" m. N n- U
- function getW(str, font) {0 U' S1 A, @; T6 A: S B
- let frc = Resources.getFontRenderContext();
& {4 ~5 E& B: H6 j/ q- | - bounds = font.getStringBounds(str, frc);
. s* d6 y% o0 `& p E: } - return Math.ceil(bounds.getWidth());) s7 K6 g1 H+ D4 K
- }
7 W- ?5 R4 Y" {6 ~9 P - R2 P" Z/ t0 n+ |; ~
- da = (g) => {//底图绘制0 r. E1 b# T. l: P/ e6 c
- g.setColor(Color.BLACK);% |' l" N N/ s2 S! [& V
- g.fillRect(0, 0, 400, 400);
5 O! l0 V1 S, n2 Y4 s - }! x4 L* ~1 F% ^+ \( r' q7 W
- ; C6 C& T' R$ ?6 I% x
- db = (g) => {//上层绘制' ~0 M9 W2 w Q/ R: ]1 c- y* V
- g.setColor(Color.WHITE);
3 I% B2 x$ f N! r! E( P - g.fillRect(0, 0, 400, 400);# E4 a' R; M: c9 ]3 T: b Y
- g.setColor(Color.RED);# P3 @7 ]+ D& `- B+ Z
- g.setFont(font0);4 L7 y9 S2 N) y+ |3 w, Z
- let str = "晴纱是男娘";
+ T8 K. u: |+ [ - let ww = 400;# g; ^; k# k' r1 j& ]' r
- let w = getW(str, font0);; h# i* h( A3 [, q* }! \
- g.drawString(str, ww / 2 - w / 2, 200); e. m, h7 T3 W% Q( Z. N
- }
. r" M- }" j9 _0 o* u! a - 9 R1 ~3 w- {- p
- const mat = new Matrices();
+ i" @: ]! W( T$ m0 {. `1 S# ]4 e - mat.translate(0, 0.5, 0);
* v7 {! K9 y3 q- [' E" {7 l
! _& c% a2 ]" q1 V9 `! o- function create(ctx, state, entity) {
\( b) T) c, @ U! P' p4 K! P; O4 ~ - let info = {4 i5 j+ t$ j+ R5 x* q
- ctx: ctx,
% k$ q% D7 z) }- w/ l' V3 X - isTrain: false,
6 x, f7 [4 x2 e3 W; A6 S - matrices: [mat],3 m P/ {3 E$ V2 l! l
- texture: [400, 400],7 h% ^, k0 e- b& U! ?( _ @' g
- model: {, g8 L {6 M, I2 V
- renderType: "light",, U, @. O- u7 ^6 t# y' c
- size: [1, 1],
$ S9 Y$ ?7 v9 ]. u7 G7 `# w - uvSize: [1, 1]
% z8 }1 O) s3 p4 S: K - }
0 U% o# L9 j1 _" K _3 r i. ^, | - }
1 |& a: L2 ^! E/ X' c: G. ? - let f = new Face(info);
6 r0 p1 L9 S4 s$ A5 T" l4 w - state.f = f;6 q9 J9 Z+ H* \. u) z+ X) V
- / m1 i: A0 z/ T c2 J+ t
- let t = f.texture;
. y. O9 `" J, p4 t8 u- q1 N( ` - let g = t.graphics;
% W2 _! ^! X6 V* r5 G" D- `1 J9 e9 r - state.running = true;
5 e2 j* l$ f5 T' k3 _: a3 A - let fps = 24;& x1 ^9 ^( p: a
- da(g);//绘制底图' P+ K" g# j, h, [
- t.upload();
' b4 Y4 o; z& q+ p - let k = 0;
7 u* k% q, X( W( E% e - let ti = Date.now();' r+ |7 i4 Y$ I/ n S! ]2 Y$ a8 Y
- let rt = 0;: A, d. T% N3 e2 d( W& b7 [
- smooth = (k, v) => {// 平滑变化
* F4 O3 Z9 n( Z. u - if (v > k) return k;
3 X& K7 ^/ E/ i1 a& {+ u2 ~" P - if (k < 0) return 0; o& `4 ]" Q" \, w
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- s/ q; j l& ]: a k5 L# Q
- }$ D7 |. l) f4 z! R* D5 f/ ~
- run = () => {// 新线程 C3 M5 v( \- F$ u" d4 B
- let id = Thread.currentThread().getId();
% P, U4 D: j' ?4 T0 t+ ~5 h - print("Thread start:" + id);
* A( Y- W j# A - while (state.running) {" L* v% m6 K% q% F: \1 R
- try {+ H# }! ^# f1 F7 R$ X. d3 f f
- k += (Date.now() - ti) / 1000 * 0.2;
- ^9 c0 H3 R; |* c - ti = Date.now();3 p7 w6 R+ @( s( w A: h
- if (k > 1.5) {
0 ~, o8 ]% f- c# ^& H) Z) u) e - k = 0;' w' q4 C) L6 l% ?0 f' G; W. H5 s
- }3 g6 \- `. B9 v, E+ Q- T3 E6 a
- setComp(g, 1);7 s/ G# s9 w& g) @7 V w8 L+ G
- da(g);
c) q0 K' O* g2 h - let kk = smooth(1, k);//平滑切换透明度2 P4 _7 g o, {, t- g
- setComp(g, kk); k5 J! _; v M# ^2 |4 Z L& U
- db(g);
1 D; ^3 M9 D1 F u, A; B# R - t.upload();
8 i2 Z0 K8 n) v+ j - ctx.setDebugInfo("rt" ,Date.now() - ti);) {3 N) p9 U' W! Z, r
- ctx.setDebugInfo("k", k);$ w$ R+ x( a( {
- ctx.setDebugInfo("sm", kk);
4 H5 _- k6 V: c6 [, a - rt = Date.now() - ti;
, h5 Y- ^% b0 {$ `7 X - Thread.sleep(ck(rt - 1000 / fps));1 z- ^1 H {4 ?. C( e
- ctx.setDebugInfo("error", 0)
: L2 t6 b9 ?* _( N4 F! s/ v - } catch (e) {
1 B9 O$ ~2 o" _7 \; H# i0 _# s - ctx.setDebugInfo("error", e);' O+ m; D; b$ z8 d n
- }9 W$ l/ e& t1 Y9 |
- }9 S7 G+ ~2 O3 F2 n! Z z9 a
- print("Thread end:" + id);3 Z) H7 Y o9 r7 [ Z
- } B! v5 _, O" I( }9 Y
- let th = new Thread(run, "qiehuan");
( k- w9 t$ { G# p7 ~ - th.start();" ~! Q6 C) q/ N w: J M+ Q
- }5 g& }1 \" e, V2 f
- , }0 G! k/ R' U4 E$ `( N& Q# X
- function render(ctx, state, entity) {
, v4 R' p( L) R: k' \% D - state.f.tick();
6 n6 M" O( n* ?0 b1 W' m% F3 V - }
* V: M, f. l) s1 k
/ ?9 B: [* Q% c3 e' i2 a- function dispose(ctx, state, entity) {
" R, |0 H' a" o# {2 _2 K - print("Dispose");* F' [4 i! W$ W" |* x+ f
- state.running = false;& D, R* |8 E+ i s* Y) x
- state.f.close();
2 v+ |+ ~; ~/ `* Y6 Y; ~! o# _" b - }2 V/ s( I! b/ m" u5 u; ~) M+ y
( X l$ _0 g6 V- function setComp(g, value) {
2 L7 U J% n) w$ |* F' L0 X0 ] - g.setComposite(AlphaComposite.SrcOver.derive(value));' l; |# M* o7 P6 }
- }
复制代码
# y6 [$ U; |4 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。
: s2 \. b, r" u9 U! I6 d; A u" P# F
% u6 s, [% n5 n0 J& F% W顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)& f; X$ \5 v5 U" ]+ q& N0 h1 {5 U
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