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0 ]1 I& ~ a# i6 w$ y+ V# F ~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+ ^2 \. b7 E% r- importPackage (java.lang);. P$ u" r3 a' Y( T3 A
- importPackage (java.awt);. P0 H* ^+ s( W1 h/ n3 E7 T
- , ]; L4 ?# K2 l3 H& m b4 p
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {4 [/ ?, ^/ n( D' H# h$ O
- let frc = Resources.getFontRenderContext();
& ?, K6 O# [4 V4 M& z - bounds = font.getStringBounds(str, frc);/ ]" S" h5 m( U. L
- return Math.ceil(bounds.getWidth());6 l# t7 a2 m2 k/ S( n: u5 J
- }3 H6 X, a z ~: i: A
( x. U+ b8 y$ h- da = (g) => {//底图绘制$ t1 O/ M& B$ |1 p
- g.setColor(Color.BLACK);+ r. A& M& _' z9 C
- g.fillRect(0, 0, 400, 400);. }& ~7 r, l2 w, L6 D" c; K
- } c4 c* t z9 H" s) t9 n7 p
3 \; ~8 d4 k" Y" i5 i8 ^- db = (g) => {//上层绘制* E, Z+ n/ V& ]' D
- g.setColor(Color.WHITE);" ] U8 x2 X6 R( l
- g.fillRect(0, 0, 400, 400);( V- g6 A0 O% V8 q4 R
- g.setColor(Color.RED);" Y% [3 ?* t8 k% S9 F. }' L% l
- g.setFont(font0);1 Y, L# v9 B4 t" l2 Q+ q
- let str = "晴纱是男娘";
5 z9 z: O1 O3 w6 B# [ - let ww = 400;, z9 `% O+ b% t; [; Y) K+ |! f% |
- let w = getW(str, font0);% p/ G" a; w) T! [* l% {
- g.drawString(str, ww / 2 - w / 2, 200);
6 X% F- r6 o; q0 m* w; | - }
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- const mat = new Matrices();
7 f! c3 m1 d: _0 Z% F# H$ U( o - mat.translate(0, 0.5, 0);( Z% s. q0 g$ r: r$ Y
- + m2 M5 ]5 Q% j4 S" A
- function create(ctx, state, entity) {
/ ]6 K3 t3 p1 p, {" R% M; Z& @$ R - let info = {
3 x6 U- ?3 l: T9 y5 {9 i - ctx: ctx,
/ x6 f& t+ P! X( V: U) L& k - isTrain: false,8 w+ k% W. U( ?% Z. J7 e
- matrices: [mat],
$ W8 v" v$ t" m( W$ v - texture: [400, 400],
' ?+ I1 B4 Y; {4 N( @% a0 \5 h - model: {! }. d$ a" T* r1 C. [% v& p
- renderType: "light",
6 a; f* U! d7 K) }7 E - size: [1, 1],- n% g5 _, g( M. P3 ?* z! P9 S" i! q9 c
- uvSize: [1, 1]3 y( t5 p# |, i2 M+ b) c3 t
- }
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- let f = new Face(info);0 c1 m+ J2 l$ v0 s" Q9 A# p3 H
- state.f = f;
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- let t = f.texture;
; f) O" ~. U* X$ `( N - let g = t.graphics;- W! l: \/ H+ o9 R' A9 ?8 q
- state.running = true;
: i: f: K2 M9 e9 h5 a7 k - let fps = 24;; b) R" O a0 z- B
- da(g);//绘制底图3 s, g0 g4 a9 |% e \0 H9 s4 Y
- t.upload(); k2 @; [' F+ ^& m
- let k = 0;
; Q& _% c3 P6 i8 w$ @ - let ti = Date.now();
( X3 e: D4 ?8 [4 V C - let rt = 0;4 c1 {' ?, u1 Y3 v/ i
- smooth = (k, v) => {// 平滑变化8 X: W( {0 w+ O4 |5 e
- if (v > k) return k;
; B. V# s8 k( G) Q' @/ H - if (k < 0) return 0;
9 \% u6 {. h7 s& l" }3 z - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程' |1 F3 H" z2 b/ V
- let id = Thread.currentThread().getId();4 i1 w2 Z1 [$ d5 U% ? x5 q3 {+ Q
- print("Thread start:" + id);" z! {$ C. l; ]- G. h
- while (state.running) {
6 K# R3 b: r& S9 Y8 R! O! r0 w - try {
" o# F1 h: o9 P7 F6 J% M5 a, H - k += (Date.now() - ti) / 1000 * 0.2;
) B2 i. g2 U2 O# t - ti = Date.now();
& a* a. L4 R( B" ?. e8 I+ P: x - if (k > 1.5) {/ J; M6 b# }/ F5 L' C
- k = 0;: ]: P0 [+ l3 x! D
- }
5 d# ?0 B Z* ?/ g4 k% K% ?2 w/ }1 L - setComp(g, 1);
$ r0 O5 m/ { `6 \ - da(g);6 _+ P; d/ T* J K2 }
- let kk = smooth(1, k);//平滑切换透明度
' B) i& c! q, T* W+ K0 E) @7 v+ S - setComp(g, kk);
[0 e* c, Y h0 o, L; p0 Z - db(g);% X$ X7 E3 M" O2 C2 X
- t.upload();
% B7 c0 X+ u% G3 v$ ^9 l - ctx.setDebugInfo("rt" ,Date.now() - ti);
: E1 T1 _" Z% t3 |! I& y/ s - ctx.setDebugInfo("k", k);+ o% Z+ y2 t! e' J
- ctx.setDebugInfo("sm", kk);' ~$ j9 l: d2 p# S/ ~( U
- rt = Date.now() - ti;
% E- }$ Q3 @3 G/ j - Thread.sleep(ck(rt - 1000 / fps));
/ x0 m6 Z/ `& m" ]! c0 F - ctx.setDebugInfo("error", 0)
; S! z; }. `( o - } catch (e) {
$ b9 {' }% u# B - ctx.setDebugInfo("error", e);5 Z \* L* g! P q6 V ~8 }& z
- }
5 N2 E* y9 ]) q2 h- ^! g1 J - }
4 ]1 S2 Q R, M3 K, N2 o( G3 l# T - print("Thread end:" + id);5 B4 {& g0 M7 {1 R* B
- }
4 u& ]5 p; C9 r! q( C/ ~ - let th = new Thread(run, "qiehuan");, @4 g. b# j. n5 G. ]" X1 B+ U4 q
- th.start();
, L; @ }, S) b, \" E; s2 X - }9 F; v( A4 z+ |* q }
- ) Y* Y. Z4 Z* @& E8 y: h+ c% w' W
- function render(ctx, state, entity) {
/ k- [, H: Y; y* S1 V/ c: g: c - state.f.tick();
9 |* H4 `# @$ L7 F6 k% c6 ` - }
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- function dispose(ctx, state, entity) {* p1 D" | ~ O' y. p' ?3 f9 c7 G6 @
- print("Dispose");, ^/ P0 [5 G% l( k0 V m
- state.running = false;' ^& g" O6 R u
- state.f.close();; s+ k: N: Y' t) C# x$ N
- }& e4 B5 i: y) R1 \
- " w- _1 m) Z% f0 o* j/ V
- function setComp(g, value) {9 s* B; Q$ L \5 k! i
- g.setComposite(AlphaComposite.SrcOver.derive(value));/ h7 w1 f" p( M0 r) T: e
- }
复制代码 0 ~3 ~3 Z* X1 D Y6 H7 D+ }- A
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。+ u9 e2 c6 f) s# l( Z3 s
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- R. |/ ~4 ^1 I* e- j1 k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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