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0 ?9 D# ?% x1 e4 Z( f2 N+ G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。
3 L5 t+ |. D! w1 }9 ]; C- importPackage (java.lang);& V# V8 Q- Z6 j" [
- importPackage (java.awt);. _; {7 T" r2 U" e2 [$ u7 ]
5 J* Z7 F% e! f- include(Resources.id("mtrsteamloco:library/code/face.js"));$ V9 D. A# Y1 G& l: Q( z) e ^
- % L- L9 u6 J( V1 U Q, R9 B4 |
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" g; n1 k% Y$ M6 Z- t" A# s
9 c* l; ? P9 |8 L- function getW(str, font) {
% n+ T# O( S" t# Z. w# h - let frc = Resources.getFontRenderContext();# g( _3 u) \) T3 w" S9 c& k8 {
- bounds = font.getStringBounds(str, frc);
6 c8 d1 {# P1 F8 t$ m - return Math.ceil(bounds.getWidth());% A2 c6 |/ T7 G9 j# f
- }
* c$ Q$ ?3 V5 C" V0 ?; X; U& {
; k4 j" ^* e$ ~: `- `- da = (g) => {//底图绘制) |( W" M r }5 L2 D3 k
- g.setColor(Color.BLACK);" N1 J; X: C4 c! Y' _ X. d
- g.fillRect(0, 0, 400, 400);
2 l, ]6 d5 u5 F( Y - }
* G! N0 I* e x' t6 x - 1 N; ]% y. }1 z I& O; }
- db = (g) => {//上层绘制7 I6 e8 ]$ s6 [! m7 k. W' S4 q
- g.setColor(Color.WHITE);1 V; t1 \" L! m+ F: h7 I; b
- g.fillRect(0, 0, 400, 400);
' e1 K' N8 }5 k! q! [ - g.setColor(Color.RED);9 A/ m- M6 H! ^/ |# |0 I7 u4 T
- g.setFont(font0);
. n! b2 k& y: s4 @7 T - let str = "晴纱是男娘";
1 ~( m- s' W, @8 Y( O' y$ ~. ` - let ww = 400;
, v$ Y/ m6 g' @; ?$ U% E h& q - let w = getW(str, font0);2 R7 @' r/ \0 G) |
- g.drawString(str, ww / 2 - w / 2, 200);2 F& X8 R5 L4 h2 r
- }0 _4 o6 I' E; R" W& j; c
- 8 |9 }( |! z- I" c
- const mat = new Matrices();
- a& k0 |' H7 L. ~6 L z5 U - mat.translate(0, 0.5, 0);
. h& u* k' B& u# j. R - ( `% `+ t) M; Q2 x
- function create(ctx, state, entity) {* V2 A' e# V2 a6 V
- let info = {
2 Y& _5 o7 r- w$ t8 _. | - ctx: ctx,! p* \0 R' x" N& t. y* _: B9 x
- isTrain: false,: q$ Z0 I2 C; B
- matrices: [mat],
4 M) i5 b. M0 g - texture: [400, 400],0 j: |; y8 a+ g9 j7 S$ O R. x
- model: {9 M; E; d" F' B
- renderType: "light",
. a6 G, X0 ?; Z - size: [1, 1],5 N6 k+ q' f- |7 X$ p9 J
- uvSize: [1, 1]
9 a% L: B, p2 O/ e; h ? - }9 x' l9 t9 f+ w* \4 J
- }6 O- r: N" @8 i, q6 _' ~% l. W
- let f = new Face(info);0 M7 d! o- f" z3 y" J
- state.f = f;
4 D [( ?8 o1 d5 i. J [. \0 V h
9 q4 K: ~2 l, N) p+ `: I8 B- let t = f.texture;
: G# w# y7 }/ n5 s3 L) t - let g = t.graphics;. L& [7 @2 {: u
- state.running = true;
( j1 R0 t8 H3 y' A- ? - let fps = 24;
) z+ F+ S0 Q2 M" y* [9 P8 f% h - da(g);//绘制底图6 Q/ d5 F4 F- j7 y
- t.upload();
2 S8 h2 l% W- c2 T8 ]3 i8 [9 O - let k = 0;
. t: l3 I3 L9 ?- C( v - let ti = Date.now();; q2 S2 [( K4 x, M
- let rt = 0;
K7 i8 \& o3 b# z - smooth = (k, v) => {// 平滑变化- ^# j' V% d) _% ]7 ~" [( F5 R
- if (v > k) return k;
f/ f1 M3 a' l2 }( I" B6 S4 f - if (k < 0) return 0;
2 J/ y: g$ r/ _* v& T, s+ i - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
' g$ r5 J; g! v, t1 P N - }7 U$ f* J8 l" {+ d- b
- run = () => {// 新线程. H `% U5 ^0 X1 X* q0 f
- let id = Thread.currentThread().getId();
. R5 z* y) y1 f- A - print("Thread start:" + id);
( w& ?& ~9 R q - while (state.running) {
& H ^* m0 X" o" k$ f - try {
3 b$ {2 r( L( D. g$ G* Q1 U) C - k += (Date.now() - ti) / 1000 * 0.2;1 |5 S: F! i. ]; b v! Q" a7 t
- ti = Date.now();
% l2 S5 ]- k5 X% J- R - if (k > 1.5) {. Y% o# i. I8 P& Q! J8 r
- k = 0;
) O. \; O: f% i5 N - }/ s, s. C& c. n3 E% o3 X5 n+ O
- setComp(g, 1);: W$ N" P/ h( t. B* X
- da(g);
0 Y3 m' w5 B0 W5 b h) R - let kk = smooth(1, k);//平滑切换透明度
$ z. Y: f' n% A, k - setComp(g, kk);
( [. e' C/ H7 p' F - db(g);4 A- K/ k: L* J5 \( R' X
- t.upload();
" E! E! S6 X2 A, I: |7 _ - ctx.setDebugInfo("rt" ,Date.now() - ti);9 f( I+ g% w, a
- ctx.setDebugInfo("k", k);
. ]; i9 \) ?6 Y. @6 e7 R - ctx.setDebugInfo("sm", kk);( p$ R- h4 o$ J8 D T1 ~
- rt = Date.now() - ti;
# y# n9 |( R: g+ v - Thread.sleep(ck(rt - 1000 / fps));/ g% s. E$ ]4 f& P/ f
- ctx.setDebugInfo("error", 0)
1 k% U6 B( z6 @3 F4 b; D( i+ g - } catch (e) {
& k( K/ @: r" S1 @ - ctx.setDebugInfo("error", e);8 I- E0 Y) g& O
- }) r& G) v9 u2 n' i% @- M
- }
i1 F8 X" B1 I) v2 J$ W2 ]" l) A - print("Thread end:" + id);
% p9 S. O- k) `; J - }$ P, u6 c! d/ C# e& f: c
- let th = new Thread(run, "qiehuan");
% s% v: t" }2 Z( }- | - th.start();
1 a P) Y8 C. x8 \; |* @1 g - }$ b4 s9 m7 [) R. G" q/ s
; w( {! F! S- t, \6 t; U' Z- function render(ctx, state, entity) {; g. b5 I) }- x$ U& n6 O; U; Y
- state.f.tick();' o. B) P. s9 V: Q
- }0 m) W* K- x; v& b @+ g. g3 l8 g4 _
6 k8 Y* {) r0 g1 w/ t' X- function dispose(ctx, state, entity) {9 s* A; A1 k& j' I6 p5 k' A
- print("Dispose");
. X ~& Q6 j" W1 H: U/ `9 c6 W - state.running = false;
2 t& A4 s- Q5 P% R - state.f.close();( @! m% `4 `, H/ J4 e8 C/ h6 ^
- }
3 N$ Z" p) m6 m4 I - 7 y3 N/ D$ R* E) R+ j7 v, |
- function setComp(g, value) {0 J0 d1 j" {/ Y6 ?' E* ^
- g.setComposite(AlphaComposite.SrcOver.derive(value));7 d2 G/ t; Q/ ~, z+ b# L
- }
复制代码 ) F2 j# V1 u8 P" C5 O- V7 z+ p
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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; n! Z) J5 h& p0 C P9 a! B顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下), a! V& R5 O* _) Z+ N
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