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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。
% R6 c5 n$ ^( E. E8 t6 Z- F- importPackage (java.lang);5 V9 ]: J4 i0 i9 J. _
- importPackage (java.awt);5 K9 K: M/ k. `$ f6 m' I
- + C$ R" p* j# u! ?9 N ~
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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/ L! l3 A: m- y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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2 b* @! b( T9 _2 M0 U- function getW(str, font) {7 S; _ p7 {5 C9 e& w
- let frc = Resources.getFontRenderContext();
' P# F$ K. \4 ? - bounds = font.getStringBounds(str, frc);
3 y$ k! q) I q+ l - return Math.ceil(bounds.getWidth());
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- ) F0 E. r) B4 e
- da = (g) => {//底图绘制
) `) K1 H0 f- e+ Q/ l - g.setColor(Color.BLACK);
2 g( v* i% z3 ?- N I" I% ^2 q0 d - g.fillRect(0, 0, 400, 400);8 |3 e( V& E9 x0 b8 S1 _* s% q( W
- }
% H( f5 c1 y' U& i - 8 l% I$ u" [4 |* N
- db = (g) => {//上层绘制
3 t6 N" W. R8 N* S, I i+ r - g.setColor(Color.WHITE);5 [$ Q. `( D" v2 [" X
- g.fillRect(0, 0, 400, 400);/ O' Y; C8 j8 {4 g% b. h
- g.setColor(Color.RED);4 {8 m1 u! R, a& V( j
- g.setFont(font0);+ }4 I6 S" u/ F& N& X
- let str = "晴纱是男娘"; I: U0 y/ o+ Z8 s
- let ww = 400;, m# ?8 t+ l: z4 Y
- let w = getW(str, font0);
; E2 R1 }9 D! {* T% o - g.drawString(str, ww / 2 - w / 2, 200);
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- , g( F1 N4 U) s+ u3 e
- const mat = new Matrices();5 S0 ` O( h' L1 W: [
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
+ H5 {; F" h p, f( W% p - let info = {
2 W" |' b. n, z0 a - ctx: ctx,
: @0 o9 ?5 ?9 L! d$ |; V3 r - isTrain: false,
/ R1 T. ]1 q/ C6 p# ]( O - matrices: [mat],
- n* y5 P B# C7 k: l( ]1 C4 P - texture: [400, 400],- X; B& t% w9 q5 E! ~: M
- model: {
" q* c, E# g- k7 M i- B- T - renderType: "light",& |* {4 u+ l$ c7 Y
- size: [1, 1],
8 [5 _/ O* ]2 p - uvSize: [1, 1]
3 _! T4 s4 H% z3 y - }
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- let f = new Face(info);3 q' b9 S. e; E
- state.f = f;% F9 V/ j6 m7 I! Q$ o! `6 x
* |$ B6 C. p* _5 K1 _/ J- let t = f.texture;
9 U) P" R6 Q6 p2 | - let g = t.graphics;
3 m) d& U" t9 n: I$ y- E: | - state.running = true;& v6 B* b2 ~# n9 I
- let fps = 24;- m D2 ]% v1 A6 \
- da(g);//绘制底图
/ u7 U- Z' d1 I/ E - t.upload();" S' X; h% _ g
- let k = 0;
8 r; z' B; C! ]- v! |1 B - let ti = Date.now();
9 k; M- D( f* n# v; t - let rt = 0;
2 ^2 f0 w2 m: I6 A0 C& M; Z0 n - smooth = (k, v) => {// 平滑变化
5 ^8 Y) v8 O! q- Z/ } - if (v > k) return k;
! Z0 M8 d+ @. L2 O: Y+ ` - if (k < 0) return 0;4 @) ^6 t, `# s D+ y4 h* J
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
: c* F# |9 o% g - }
& V1 _8 X2 A: `! b5 h, U' s0 @ - run = () => {// 新线程7 f/ w# z: H& w0 i G
- let id = Thread.currentThread().getId();% I4 V8 Q: C6 q# @9 \
- print("Thread start:" + id);
5 k9 R: U3 b1 w1 Q8 j - while (state.running) {
; V) S/ I, l' L1 X8 M - try {
4 M* L, \/ p7 B* B( z6 ? - k += (Date.now() - ti) / 1000 * 0.2;- O( Y7 B, U/ ^6 j- c' Q
- ti = Date.now();* q0 w- L+ X9 d( z& j0 v- B
- if (k > 1.5) {' x1 j' o6 P( E* \" x, ^% {% z: n
- k = 0;' d! U$ E, `* v# U9 d1 i
- }; [5 T, ^1 J* Y# @- C
- setComp(g, 1);' \" L; P- T( u9 ^
- da(g);
( n2 j, I0 x e) @0 r; M - let kk = smooth(1, k);//平滑切换透明度/ ~) t9 Z" Q; g4 s" j/ q! j& @
- setComp(g, kk);
4 X% y; }" s% d) c4 t+ F - db(g);
+ V8 I4 C- K) P. f - t.upload();
# N8 X/ ^4 J) t3 f% p( Q3 X - ctx.setDebugInfo("rt" ,Date.now() - ti);
: ~ Z9 Z0 r) c; y. j& C9 V - ctx.setDebugInfo("k", k);9 E1 y, G# X% D! C' |7 e; U
- ctx.setDebugInfo("sm", kk);- J( r/ o' O1 s* t1 J% E E. ?
- rt = Date.now() - ti;0 x1 p% r% a' y( D, p9 s, c
- Thread.sleep(ck(rt - 1000 / fps));
0 U/ r) c( S% o* w) Z - ctx.setDebugInfo("error", 0)+ f6 ]6 X0 H- ]" u
- } catch (e) {
* L% d8 J* x3 Z2 A/ F6 h - ctx.setDebugInfo("error", e);
- _ y+ i6 @' o$ b( V( ~5 ~' d - }) w/ P- x" e+ q
- }5 w# q$ W0 i" @5 \" S
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
! e. b4 t. P1 F% u - th.start();
- Z: U# [, {6 N7 a4 q1 `( ] - }
, S0 v% M( @5 [0 Y% h - ' e1 h# ?) C9 T- r
- function render(ctx, state, entity) {
# E; d, [+ Z; R: T( e$ B - state.f.tick();
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- # D! B& R& p0 {* I/ u. u! c# s c2 Q
- function dispose(ctx, state, entity) {: ~0 l4 {! E, Z( F$ L( j; l6 I
- print("Dispose");. s+ x, {+ Q0 r l) ^# l% z( e( b
- state.running = false;
5 h0 ~2 y9 Z. M- E - state.f.close();
u: S7 F5 x: x3 b/ D0 H - }/ {$ O) X$ l# ]
- ) A2 P% ]; O5 a: n5 U9 Q
- function setComp(g, value) {* |( V0 L0 Z1 p, h
- g.setComposite(AlphaComposite.SrcOver.derive(value));: P u t0 I7 w; m' g/ B7 {
- }
复制代码
& X3 U9 i8 M x1 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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$ s8 `. ?3 Z0 {% }* I. }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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