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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。
9 | h; X2 q1 T* h# {/ ^- importPackage (java.lang);
- S1 c# W& Z: p$ j" p2 P - importPackage (java.awt);
3 y0 v: y7 p7 S$ w - : T7 Y( u1 k4 i" S: X9 }* G
- include(Resources.id("mtrsteamloco:library/code/face.js"));, I6 q: ]& U# C8 [
- ) v. {* W/ D8 U# ~& k; H
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 v# y: @' }( q0 t
$ `, x& m* C9 u% f- function getW(str, font) {
8 Y/ d. M( l+ D) |8 Y - let frc = Resources.getFontRenderContext();
' _; G* l% k7 i) u - bounds = font.getStringBounds(str, frc);
/ c" i3 M' |" u$ V - return Math.ceil(bounds.getWidth());/ }" P6 E+ ?+ L3 c
- }
- ~, q; R# I" u/ r( } v - # a5 ?* ?0 p, d. i0 {
- da = (g) => {//底图绘制
9 `4 r; R. C- E! i" x - g.setColor(Color.BLACK);) L f. |1 o8 m3 M* }
- g.fillRect(0, 0, 400, 400);
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- / H: a5 L5 r& J: S8 C5 D
- db = (g) => {//上层绘制/ ?7 _5 U/ U8 H" k/ Y
- g.setColor(Color.WHITE);
% c' m8 C: _! p( X/ J6 n/ v$ z - g.fillRect(0, 0, 400, 400);
* j+ X* }% c! J6 u - g.setColor(Color.RED);. O5 d+ A. J8 K
- g.setFont(font0);
' |. P% j6 d0 O9 b - let str = "晴纱是男娘";
( D6 @; I7 j. y" D - let ww = 400;
3 u- B, T. e6 B! D/ G) Q. _ - let w = getW(str, font0);
4 I. A/ ^) d/ B8 n7 ]( x - g.drawString(str, ww / 2 - w / 2, 200);8 u3 e5 I$ d x8 w3 L% N& s
- }
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- const mat = new Matrices(); x, V& L3 ?8 ]2 O4 i' _' E* H
- mat.translate(0, 0.5, 0);! ~0 N4 E% D0 Q
4 w/ j8 c7 [# ^' k. v0 c8 l) Q- function create(ctx, state, entity) {0 u! L* ?( c N4 R$ ]
- let info = {
( g# t! y9 R M) c9 Z, V& t - ctx: ctx,$ R* Y3 h1 G. T1 T4 A
- isTrain: false,$ Z% ]5 G# \* l% n I
- matrices: [mat],) H K- m! J9 |0 r+ ~$ T
- texture: [400, 400],$ c! g" B6 l+ o6 N! H+ N; o
- model: {
% o5 |% U6 y& w. I1 a - renderType: "light",8 W! o7 q0 l/ U: y, d
- size: [1, 1],
/ [0 E8 j# p2 z T - uvSize: [1, 1]
/ c! U; l) i* Y+ n! d - }4 z5 H& E, C" l/ a% N! g0 Q
- }
$ f9 z0 O6 m% ?4 i9 ] - let f = new Face(info);
; G8 s: D, S7 l: U; D$ i - state.f = f;
$ h4 Q, V6 @) f# {/ V4 x
, m, }$ R* T3 P7 L5 ?. M) S- let t = f.texture;
' |* ?: J/ p' m- d - let g = t.graphics;
8 Z9 J: Q) H( `& R - state.running = true;6 D. N% x$ B9 M2 D2 g
- let fps = 24;
; w3 V o: f/ o% C& \( x3 B- f# H" L$ I - da(g);//绘制底图
5 M, B X- y; Q9 d" g- Q8 a - t.upload();) Z8 f# B) M5 e* R% q
- let k = 0;
. N& x, M9 R2 c( H - let ti = Date.now();/ Q" A: t# U4 c
- let rt = 0;
, ~- w0 D' z; ^( k8 R9 O7 E, t - smooth = (k, v) => {// 平滑变化
( R& r$ R/ Z2 Z; ^" I - if (v > k) return k;
3 R T* z- K* P8 } X - if (k < 0) return 0;
1 O* Y+ Q v5 `( ]& Q - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 o- f) L0 }% E {$ w; {
- }# }3 z; P/ l% v2 v; G& Q
- run = () => {// 新线程) E3 ~, Y! U! Z3 I$ k) R" L f
- let id = Thread.currentThread().getId();
. j y" R( C0 i, t6 R9 M1 z - print("Thread start:" + id);2 g8 g8 v! E( B+ B9 n- I
- while (state.running) {
% }+ ~+ F* Q7 K" y- C8 o5 E- Q - try {
& `. u3 s( U* n, U2 A - k += (Date.now() - ti) / 1000 * 0.2;3 n- K- A* Q7 S, X5 z4 T
- ti = Date.now();
V" Q- E: r/ ]' R0 \( o9 Q - if (k > 1.5) {
4 l) B8 P f- a8 u! @' {' p - k = 0;) a1 ]8 X: P/ L$ [0 j G& M
- }
: ?1 j- O. Q' A% p) P1 n - setComp(g, 1);0 W$ F+ @2 j4 j7 O! N9 R
- da(g);
% P0 I! ^+ Q1 } - let kk = smooth(1, k);//平滑切换透明度
7 @0 u# j) O, u$ R - setComp(g, kk); Z; U! n! ~. E- Q' C, L" @
- db(g);
7 N' b6 \% ^! H; n" m - t.upload();
. ?- o; y1 t' m$ o- T4 w - ctx.setDebugInfo("rt" ,Date.now() - ti);
5 O" l. d, W3 j# K - ctx.setDebugInfo("k", k);
0 u% o* j9 `* c8 F7 o5 w - ctx.setDebugInfo("sm", kk);/ e, ?% }6 M' K( p
- rt = Date.now() - ti;
- R. d) L0 {# f# E. M! s& k& N6 k - Thread.sleep(ck(rt - 1000 / fps)); R; z; u% f; g( d0 x4 E% C5 ~
- ctx.setDebugInfo("error", 0): `3 `2 `% q$ S7 o% K! X6 p6 F
- } catch (e) {- b3 I" u8 u7 \& [
- ctx.setDebugInfo("error", e);
3 k7 \9 X _6 X - }9 n* P+ o+ x6 a" _" _6 S/ B2 o
- }
7 Z9 l" \6 M& { t4 q - print("Thread end:" + id);+ \* J" p- G3 Z" f" |4 d4 E
- }
' ?$ _. }( ~( q1 X: `$ A - let th = new Thread(run, "qiehuan");
* H+ j$ N7 k% Q9 Q& m - th.start();
7 h9 P& r6 e# X6 I5 T( J; H - }7 Q2 g7 m% ]) j' t6 e* @* ]0 w
- " Z" C6 E% u+ k; g+ l& F c2 W
- function render(ctx, state, entity) {# d, g8 v% a' B1 z" R" g, X2 b2 D. m
- state.f.tick();7 }: J: r( H/ p* l( T2 G
- }, z# x0 `3 |7 U6 K2 ^/ M+ t% C
7 F2 r- X+ c& H% ~% a6 L9 D) N: F! a6 {8 e7 B- function dispose(ctx, state, entity) { q7 O* E+ A s& }" _8 D4 P
- print("Dispose");: O2 V0 ~- m6 d2 i
- state.running = false;: i. r5 }& W& [$ L/ s A, U
- state.f.close();4 m4 ^0 Y% |+ s- m. D: O' x- f
- }8 I' W/ N$ r4 j
- ; Q/ S7 ~" Z. r% ]) S
- function setComp(g, value) {* w8 h8 h$ R) f8 A2 j% e) @
- g.setComposite(AlphaComposite.SrcOver.derive(value));; a% {' t6 r" w3 d# `& W
- }
复制代码 4 Z/ A) e- r* ~
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。6 y6 P7 x2 V+ o) A2 s% m9 x) @
+ m0 z! B2 u1 Z0 n
! f; M+ Q5 f3 p4 a6 h& `# v) d: w; j顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)! j2 M( X( a. L+ A- T" I
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