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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。& }! Y( E! Y4 `/ g9 f2 ?' k }
- importPackage (java.lang);
) n9 Q: o) j5 T2 d+ ]: W$ ` - importPackage (java.awt);# Q7 D" K4 G8 ~' C# x
9 B7 M3 ~$ y4 @! B X7 d- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! D/ q5 v, G% V3 P: K6 M
, @1 C U% O a4 [ B+ y' R- function getW(str, font) {
( S) Y8 O$ V6 V% q" u$ b- `$ @, v! g - let frc = Resources.getFontRenderContext();. z2 W; i9 X. y" ^* L
- bounds = font.getStringBounds(str, frc);
$ S0 Y# D1 g$ t6 D - return Math.ceil(bounds.getWidth());* o- I0 ]& K) J" _0 K" ]
- }$ f4 p* R7 Q# n4 C
* O& \! o/ ^3 x3 z1 ^- da = (g) => {//底图绘制
# k8 g( A$ Z9 ]; | - g.setColor(Color.BLACK);7 ~2 p* {; s+ _( I9 h9 T3 k
- g.fillRect(0, 0, 400, 400);& i9 [' u/ c* x1 Z/ O0 Z
- }
- H6 E7 Q$ N, I% M( q6 {8 {: P
8 N2 i5 k8 X1 |9 N- a- db = (g) => {//上层绘制
* o* y i) c+ a" p$ e - g.setColor(Color.WHITE);
( N: u K) n1 D* e# B q! {+ B - g.fillRect(0, 0, 400, 400);
7 J- ~% w, m& _) k% Z" J! h - g.setColor(Color.RED);
$ m8 ^5 |. E0 v& W - g.setFont(font0);" K/ C) ^3 e6 }& K* ~+ a/ F& x
- let str = "晴纱是男娘"; m' A8 l# d( b! T
- let ww = 400;
" T* C- B. S# o2 y2 i - let w = getW(str, font0);4 i' x. ]; O7 m) ]" n2 F
- g.drawString(str, ww / 2 - w / 2, 200);! w. ~2 C$ [( ]7 l- i- v5 C
- }
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- const mat = new Matrices();
, ?$ O- g. c; D }# q - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {: }; q8 Z: c7 }( ^- k& Y: i" H+ T0 T5 }
- let info = {( s3 @% i/ I; \! p% k
- ctx: ctx,* V; h8 F* W0 d' q; _
- isTrain: false,
9 H8 C) V$ G5 x8 D9 e+ ~ - matrices: [mat],
$ V7 e: y* Y* j: o - texture: [400, 400],7 @4 O% X+ z) b h1 N9 l1 ~9 M: D
- model: {; `# \9 z' _8 @, u; _- f( [# |
- renderType: "light",% c- i+ M9 W, ]+ w8 Q) H$ o
- size: [1, 1],
) @/ S- a& l5 V$ Z) K# s* N - uvSize: [1, 1]
9 }2 \% {6 s& N, M2 ? - }
/ m$ H2 N8 C" w% a - }
9 V' k8 J; d+ M - let f = new Face(info);
$ }) N$ h2 J3 A0 F% ~ - state.f = f;, O: s! w6 A* `
, x4 ^9 W. ?: N3 Y- let t = f.texture;2 {# P/ u/ A& E( D
- let g = t.graphics;
* P% |8 C' e" c7 [) ]: T, n9 O& g. w - state.running = true;
2 s* y$ q! ~* x+ L, V- y% z - let fps = 24;
& N) h+ L7 f7 O$ i- f/ \* q - da(g);//绘制底图
7 [4 l' S7 P1 ~+ d9 o - t.upload();4 S# Q$ K" j6 ?5 a9 Y* L
- let k = 0;
; [$ T4 Y" P, Y |+ z1 {+ ~ - let ti = Date.now();
+ _/ E2 \# g z: k8 j0 r - let rt = 0;5 f: o1 G/ x3 F. _' K
- smooth = (k, v) => {// 平滑变化" f, v7 a" O/ O% z
- if (v > k) return k;
7 q; d* I k+ f5 _ - if (k < 0) return 0;) y5 `; [ H, _( [ |2 q, u
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 q* t0 O! c" Q
- }- G3 l. I. q4 N$ ]: y! E" T# ?1 q
- run = () => {// 新线程
' I! e8 k3 m5 i3 p, z - let id = Thread.currentThread().getId();
- O+ k8 A& X' S; q - print("Thread start:" + id);
V! F' _! D; X4 q& z# h - while (state.running) {
, F2 c! U* e: @$ J6 S' U - try {( c1 H. Y9 n$ e, O8 z+ L) b
- k += (Date.now() - ti) / 1000 * 0.2;* I. y" N9 Q) a2 C8 w+ q, q1 o( _
- ti = Date.now();. Z5 j* j$ j/ R9 l, B
- if (k > 1.5) {
1 b- }. ~: a( B* ?2 Y1 [% | - k = 0;
9 S5 W: l' C0 `; K4 g+ E8 a - }
; P+ b4 ]9 T+ d# g6 Y0 A; j - setComp(g, 1);# x' |: Z. ?2 {6 c/ f
- da(g);4 {' P! r& F, o' M1 Q9 S) j
- let kk = smooth(1, k);//平滑切换透明度' ]! x% J: E% g0 ]$ ?) M) D! s/ V, g0 h
- setComp(g, kk);1 K) K# ^1 y- W6 n+ B
- db(g);
2 @. \# f1 L2 X" |; [$ ?) G3 ` - t.upload();
7 Z; Y* l/ B4 q5 {, S. ` - ctx.setDebugInfo("rt" ,Date.now() - ti);
% j) n* }( K3 o6 d. L1 k - ctx.setDebugInfo("k", k);
1 T6 W- U/ v% V6 P - ctx.setDebugInfo("sm", kk);8 `2 A7 W4 r! @9 i
- rt = Date.now() - ti;! p# x8 i4 |) m2 M) Q
- Thread.sleep(ck(rt - 1000 / fps));
2 \4 P; U6 E7 _ Z" ~& P6 K - ctx.setDebugInfo("error", 0)
& S$ _/ d4 V% R - } catch (e) {7 \' W. y" [* S" w8 R1 [
- ctx.setDebugInfo("error", e);
9 z& r: {0 c _8 J b - }
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- print("Thread end:" + id);5 X+ b( t% B k7 H) e, f. |
- }' \ S3 C5 s; H8 p" X
- let th = new Thread(run, "qiehuan");
& r! W: M2 d* W2 n" t- c1 g - th.start();1 Q" k+ M6 l& H4 q
- }
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- function render(ctx, state, entity) {
4 I! h F4 J0 H! p" {' R4 g+ m1 N - state.f.tick();
1 `- m4 }! V' a* ? - }
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. i0 K+ t* A1 _, e1 Y( i5 H- function dispose(ctx, state, entity) {
6 E8 m$ A* b) q" o G i - print("Dispose");0 `5 M$ h' q+ C/ z/ A) @
- state.running = false;
0 D" `; [4 T* R" g h - state.f.close();. W: P! e1 W2 V4 d/ E% `( G
- }% v% z @9 q, t+ }' \! w6 W; u
4 \) i+ N9 y' o4 k, G) E- function setComp(g, value) {
. B1 K; V* Z8 R/ E - g.setComposite(AlphaComposite.SrcOver.derive(value));
( n. Z3 ]5 W1 \& i7 O3 C - }
复制代码 * M0 L3 W* U; l& ~) o5 v, v
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), N( L$ ~' ~0 q6 k; ]0 |( S9 q# j# L
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