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) g F# j' g5 w1 o" H. ^' A4 H. ^2 p& Z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。
; b" @6 A' f* n- importPackage (java.lang);
: P# {+ `- g1 B% g! H A, M - importPackage (java.awt);( X% K8 W7 M; e0 C
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- 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) {) P" n1 K, [9 G y
- let frc = Resources.getFontRenderContext();, p! R; k6 R/ H& p0 W
- bounds = font.getStringBounds(str, frc);
, t6 ?& u* R8 N: V7 |( z8 j, O - return Math.ceil(bounds.getWidth());
7 G) |! O4 ^1 U - }
- S3 j6 U7 ?; t; x/ C! a V) J. j - / x0 A5 D7 p7 j
- da = (g) => {//底图绘制
( u+ K D8 p, r3 C& `1 } - g.setColor(Color.BLACK);
% q7 ^7 n. @& T" \$ V0 k - g.fillRect(0, 0, 400, 400);
% G. N; O0 N1 C+ V- W7 H - }
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- db = (g) => {//上层绘制+ b0 M9 ]' x; t# `; y9 a# e
- g.setColor(Color.WHITE);
" y2 K1 m1 _3 F3 Y9 R2 b3 \" G - g.fillRect(0, 0, 400, 400);
/ y3 E/ f+ W7 @0 g9 e+ V3 j - g.setColor(Color.RED);
$ K/ Q: O+ O# X5 W4 M - g.setFont(font0);! t3 s. z2 z7 @) C6 U( l
- let str = "晴纱是男娘";: f: S7 G5 [) a! c; Q# y- L! o
- let ww = 400;% |. X; C# E1 ?; a$ \
- let w = getW(str, font0);
$ s, l. C& S7 a$ x* Y6 `/ y. C9 V - g.drawString(str, ww / 2 - w / 2, 200);
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% e2 j# E, [7 e( U. I( c6 Q% ?) d- const mat = new Matrices();
3 W% s' T& y- j; K7 e) P - mat.translate(0, 0.5, 0);
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" g$ i8 v. e' u: C# R- function create(ctx, state, entity) {
! N* r' O" ^6 y1 ]3 j+ a - let info = {* C- R( ?/ [# J8 y+ @
- ctx: ctx,
1 J7 e- {1 k: |; _ - isTrain: false,
2 _8 O3 ~. {( e! k8 g. ^ - matrices: [mat],
6 K4 i( w4 D! h. m: X2 x - texture: [400, 400],# Z( h* m2 U/ I
- model: {* M0 L5 p8 h, i4 g
- renderType: "light",
7 A4 N( ]' P" a3 u) m - size: [1, 1],
+ ~$ p. Y/ c6 f7 G - uvSize: [1, 1]$ U" ^3 l! k$ j; o
- }
" ?4 [2 O: I- D/ b/ E - }
* z- K1 y6 R. b/ Q$ _; v6 `* I4 } - let f = new Face(info);! i; v9 l- e' F
- state.f = f;& p A* J ]& j
+ q( f$ S" i- q5 ]- let t = f.texture;$ r$ y# H7 h' l- O
- let g = t.graphics;0 X) ^$ d: Q( j8 C% u) ]1 y; K/ N
- state.running = true;
- N7 y! N5 g7 ]! I) L J8 ~0 E; L/ Y - let fps = 24;
" C+ h& V1 t: j - da(g);//绘制底图
* u1 |, B% z# {- ^ - t.upload();
* \; o1 Y8 e% P0 \ - let k = 0;
) M& x1 m H( l) m2 G! i4 \ - let ti = Date.now();
1 J% u/ Y7 p& | - let rt = 0;. Q& u" H8 Q- k# ?' P6 g
- smooth = (k, v) => {// 平滑变化
, j: b# [! S/ c% v V( s9 k- v - if (v > k) return k;
6 Q: [. X/ |2 ^: C+ W4 Z - if (k < 0) return 0;
8 g+ Z) w8 [, X+ d) z8 s* L - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; S7 {" n+ y- j# {5 {# M
- }: u5 h: Z# H) z* v+ d" x
- run = () => {// 新线程
+ h0 A& E) X" _( G - let id = Thread.currentThread().getId();
3 f0 w4 M- O/ [( w; e# w, J! J - print("Thread start:" + id);/ S' X3 o6 D4 ~8 c' Q) E
- while (state.running) {
. D7 O3 X% y. P$ C1 w - try {# R2 Q: W1 v$ Z
- k += (Date.now() - ti) / 1000 * 0.2;
$ u7 n9 F+ ?6 c& g) Q - ti = Date.now();% X3 Y3 A" F0 U1 o7 f) R7 E
- if (k > 1.5) {
' \+ S7 P$ ]5 D# B P4 F$ \9 P: q - k = 0;
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- setComp(g, 1);5 E N8 O" D* w) z$ P
- da(g);
+ n( F. o) l7 a R+ B/ w - let kk = smooth(1, k);//平滑切换透明度
0 m7 x0 T9 _3 D5 _/ | - setComp(g, kk);
1 U; T5 \+ H8 R) R - db(g);
# o4 `* |. w/ R - t.upload();
* Y3 y/ c( D4 k, ]7 w - ctx.setDebugInfo("rt" ,Date.now() - ti);! p+ r% e+ |: m' D1 z
- ctx.setDebugInfo("k", k);
1 Q' q+ x/ `4 h/ v - ctx.setDebugInfo("sm", kk);+ a/ K1 _) W3 L$ Q1 L
- rt = Date.now() - ti;
+ }# p; j2 a( q/ G - Thread.sleep(ck(rt - 1000 / fps));) a4 L+ H! s: }& u# R
- ctx.setDebugInfo("error", 0)' A+ R$ N M+ E0 [; s
- } catch (e) {7 {; q0 |9 {: c. A) b
- ctx.setDebugInfo("error", e);
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- }' J0 e6 ^! G5 U8 x& h/ h `$ C
- print("Thread end:" + id);
' f! ?" [0 M; v8 v: ]' B - }
: o/ x9 b3 m3 [" A! Y4 u0 c& r - let th = new Thread(run, "qiehuan");+ }& ~5 d( a# A/ C1 P/ _7 f) r* q
- th.start();" c5 p: W$ P. w0 P4 w
- }3 x$ R- i' G1 W r6 i
- 4 P8 p& H) R6 T! `3 x( P! o
- function render(ctx, state, entity) {. j, `1 w5 w/ c' v# u. a9 v% T
- state.f.tick();% a& \( L/ l. Y+ p Q9 N2 O4 G: Q
- }
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+ D$ R0 {- ` x# c/ v- function dispose(ctx, state, entity) {* E9 j6 g; j. \/ ^
- print("Dispose");. B/ a; c3 n5 V% X7 N5 {6 G# h3 X8 R
- state.running = false;, r6 t8 W0 _! O3 a! K9 A
- state.f.close();. `- S M: V& K" `! b' x
- }' z0 {7 l0 O5 r% B
- - T" a7 R- d( H" i0 V
- function setComp(g, value) {2 c0 X. O6 @0 b. i9 e
- g.setComposite(AlphaComposite.SrcOver.derive(value));8 C- L) Z* [" t: ^6 J* u
- }
复制代码 $ c3 x* u l) H" t! 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。) W k) x! z; V, P; C3 b
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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)! m8 x1 i2 {7 ]: l9 E! J$ _- J
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