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5 a. X- y1 {. S3 P. q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。! k+ E9 a. H* M7 F0 ?
- importPackage (java.lang);
0 p6 S0 J& D. _, u - importPackage (java.awt);. U8 z, I# Q+ R5 [9 S
- 2 V* n# v, N! a) y9 L
- include(Resources.id("mtrsteamloco:library/code/face.js"));# z" T P' {! Z8 j& z+ R
- , n8 V2 K- T$ ^% Y9 D2 [4 x
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
" z- S" t% k' ^6 u1 V$ k+ _1 b - let frc = Resources.getFontRenderContext();; _8 U. Q7 H/ Z) l$ C
- bounds = font.getStringBounds(str, frc);
4 m Q" D$ C$ [3 M3 {, i% K" U5 J - return Math.ceil(bounds.getWidth());
# A- o9 v/ C u: J6 A" g1 v$ [ - }
6 ~- J. Z/ L) e$ y3 G6 E8 J
/ o* n0 T* D. j& V- da = (g) => {//底图绘制
$ P/ ~( l" \1 P - g.setColor(Color.BLACK);
) x. w* j. r8 i6 B- |3 a - g.fillRect(0, 0, 400, 400);' W/ U$ b+ `. P: }
- }! H/ z( R' d# e
6 g; D0 q1 _& U7 |0 q1 E9 U5 |& ?- db = (g) => {//上层绘制
- y2 W$ L7 r8 C - g.setColor(Color.WHITE);$ \- Z# Q: I# j1 F H: o6 x$ y
- g.fillRect(0, 0, 400, 400);5 v0 s0 ~' I. |$ w% u2 {' b
- g.setColor(Color.RED);
2 `- a; Z: R, I( P - g.setFont(font0);- {( x0 {; x% {) f
- let str = "晴纱是男娘";
2 P8 T4 z! M) b# k& c - let ww = 400;7 u7 B$ ?* \* u2 I9 g( t& [
- let w = getW(str, font0);
" z! q+ A8 [: \9 _4 W' x& u - g.drawString(str, ww / 2 - w / 2, 200);$ p4 E3 q; d8 L* N; c" \
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$ a5 _) o% M7 S+ t- const mat = new Matrices();
+ [2 a3 S" H0 u/ _ T - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
4 V4 t- P4 r. }7 L7 R; i - let info = {
: A( z# c2 X* E3 V7 U3 L' L - ctx: ctx,
2 D( e: |# W9 g3 Q - isTrain: false,
6 A+ v. O$ I/ w5 s. U' {. S - matrices: [mat],
1 r K( W$ A" W! d; t - texture: [400, 400],- q* v& q. J& E0 N
- model: {
+ C5 c* [' N2 i. h/ l+ a7 `9 n7 ? - renderType: "light",
/ ]. O6 N$ {! M8 Q - size: [1, 1],
, Z, e+ s; ?' ]- M - uvSize: [1, 1]. [0 C* b# F6 n4 s( R9 A1 m S# Q
- }
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- let f = new Face(info);
' o* R% W' k6 x, A! X - state.f = f;6 @& I7 U$ F( M1 u
( I# z6 H4 h" C9 j$ R5 q- let t = f.texture;' ^6 U- V; H1 T! ^0 M
- let g = t.graphics;
( t$ }" u2 t1 y% u# k - state.running = true;
1 i/ [2 W8 |# }0 J/ u - let fps = 24;
2 }7 X, c1 z; {- X! L - da(g);//绘制底图
B, L+ |3 [0 P y9 Z! H - t.upload();
8 Z/ R- r4 T8 T) O - let k = 0;1 A- e. g/ K' C5 s( ~& Z- g
- let ti = Date.now();
7 m* ~& G3 ~. u" x4 J7 K - let rt = 0;3 b* K. f4 b+ q( ^+ z4 d4 p
- smooth = (k, v) => {// 平滑变化
) W: s; [" a6 B/ H4 ]0 Y$ i+ ` - if (v > k) return k;* K, `5 @( o2 q, \6 e! O
- if (k < 0) return 0;
4 @# [6 E I" R/ W3 W2 [ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 ]- {: E3 f& q1 T# c, j
- }6 `4 ?7 \7 p% [5 a7 Z, B
- run = () => {// 新线程
) h% ^) R9 `% _6 x+ F, `# I. p - let id = Thread.currentThread().getId();
4 V1 X4 e1 G3 R" w! P! | - print("Thread start:" + id);
5 Q4 F; O- b2 D$ ^" X) R4 {3 ] - while (state.running) {
2 ]" F/ U# ?% l - try {+ d: Z! h" Z& }$ Y
- k += (Date.now() - ti) / 1000 * 0.2;
. J8 a/ W/ ]& _% Z9 w1 y - ti = Date.now();2 V6 m+ R6 u) k
- if (k > 1.5) {
. ^" }! B, A5 f - k = 0;
5 w: l, W7 [8 k' C: M* y - }
3 Q- t5 e: y8 d8 x - setComp(g, 1);3 e9 c9 u3 Q; g
- da(g);; k& z: n5 C9 M) |# r5 ]5 X; j
- let kk = smooth(1, k);//平滑切换透明度: N9 V' N- B3 _' J+ R
- setComp(g, kk);0 [3 `* g4 x; r5 j- e
- db(g);/ a1 H' o% A- _ c) B
- t.upload();
9 j, |) c( |& @ D - ctx.setDebugInfo("rt" ,Date.now() - ti);
. I) s: X7 A# w& U - ctx.setDebugInfo("k", k);: R k, C& X8 l M9 `4 y
- ctx.setDebugInfo("sm", kk);
8 ]( \* g3 R" l& w/ Q) l% e8 Y- } - rt = Date.now() - ti;
7 r3 r. P; F& P; d9 X2 [9 I - Thread.sleep(ck(rt - 1000 / fps));
; r- P; s& a7 x$ j/ v2 k7 L! g - ctx.setDebugInfo("error", 0): d* k, C9 y5 g9 }4 ]0 k w
- } catch (e) {
. W7 U$ B( g* k5 m) I% k3 j - ctx.setDebugInfo("error", e);
* N) j, `" ?+ I7 I - }
* U l( C8 P6 Y P, V. z - }6 g6 Z! _* \- e" n3 `4 ~
- print("Thread end:" + id);) W' f( V' e* W! s, L/ s
- }
. x, ]+ @ l) l, i2 O2 r! P - let th = new Thread(run, "qiehuan");
5 l' Y D/ Y: e+ |( a - th.start();; Y! n$ Z6 s6 d' z& d/ Q
- }
9 U6 }! _, f) q7 ~) s6 V+ b - 7 k3 j; \! g: T ]3 T' u" i. F9 p
- function render(ctx, state, entity) {& i$ X! V% Q* `5 {, m7 q
- state.f.tick();# E% ] b/ s9 U
- }
4 u V5 I/ \2 g0 Y; h0 d
! _0 i9 [$ n! D4 m! g9 L5 F& i# E( `- function dispose(ctx, state, entity) { H% z4 K* v5 u, Q3 H+ B: k" q
- print("Dispose");; v% M: l6 K& O0 D& P, n
- state.running = false;( ]. \# I0 t9 X, }$ }+ |/ O
- state.f.close();
) k( D/ l# ?# b4 U' J7 e- o4 ] - }: t* Q2 E8 g5 j& n* |
5 Y, y0 D$ G3 i+ ~- function setComp(g, value) {
3 o3 _6 W. |; O8 R# K - g.setComposite(AlphaComposite.SrcOver.derive(value));" C) w+ Y& q, W8 T- s
- }
复制代码 7 s) A- G. f! g* g4 C
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。
* N6 W U# Y' Y( a' {- L& v( @9 N2 M0 ]- N w" Y* P
6 R7 D* W% C, a( ]0 p1 y* d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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