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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。
2 B4 M4 e" j$ n: _' I6 c; e- importPackage (java.lang);
# U9 B8 W& @$ [0 d: f( ?8 l( J - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));# V5 b+ Z/ }% U4 ~
1 |& B: k+ k3 o- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( n, } y8 Q( x/ H. U% R
1 Y3 g/ e- ]2 u& y- function getW(str, font) {0 V* G6 S2 i6 @5 S9 X y
- let frc = Resources.getFontRenderContext();
: b- c6 L7 f& e5 h) f5 H8 b - bounds = font.getStringBounds(str, frc);
0 e% U, U% L* W4 _ - return Math.ceil(bounds.getWidth());# ^: ^. X) R5 W% o9 F& [. }
- }2 m+ D0 T1 U- c+ O! G
- 3 d' n8 D g! a9 s! b' [
- da = (g) => {//底图绘制
" X; Y% ?. t% G3 z. J - g.setColor(Color.BLACK);
. `0 I: `! _; P& A/ j1 f1 ] - g.fillRect(0, 0, 400, 400);
# H4 Q h5 u* p. v/ F - }1 X5 h) {' Y! p9 i* W
# _( X* b7 p7 @" a5 }. o( Q- db = (g) => {//上层绘制' E: g! Z% f! t( c; o
- g.setColor(Color.WHITE);
0 U4 U. \+ ~1 F! `: ] - g.fillRect(0, 0, 400, 400);
2 L0 v2 l1 {/ {0 o8 T. d - g.setColor(Color.RED);
: }. Y) n# |" D' T5 f6 O - g.setFont(font0);
' X5 x' W+ A! V5 K - let str = "晴纱是男娘";
~ }+ m9 u: @) V% w - let ww = 400;8 N& e0 U0 }* f1 R, O) ^, i9 t6 Z
- let w = getW(str, font0);
! K! @1 I; T- V) _: J; i$ c - g.drawString(str, ww / 2 - w / 2, 200);
; f2 K, U* n+ i - }- ^. y" g1 w$ K a
- " Y3 H0 a) b; W' _/ s( Q
- const mat = new Matrices();
" }9 g- p/ ]# s5 V - mat.translate(0, 0.5, 0);6 G2 L3 z" Y: x* g
- % u" D( E! j( M. X
- function create(ctx, state, entity) {9 @8 z. \7 U3 `# b7 l0 W
- let info = {
3 [8 v6 m) x* T( e- l. z( {1 ] - ctx: ctx," B0 ~1 z3 ~( B5 [9 Y
- isTrain: false,
$ S4 X: B' M, I1 @, A- l - matrices: [mat],
% U9 A P+ X9 Z _ - texture: [400, 400],
/ _4 f0 |8 X' \ ]/ t( T! ^( q - model: {
) N3 ]/ `8 a5 a* b m8 R, H) Q - renderType: "light",! D. i3 D1 @, x9 {
- size: [1, 1],. J/ D# Q g: N% d# D4 S- G
- uvSize: [1, 1]& r. o% G4 q& T( j
- }
( @: @' i) }; f4 L( n0 y9 c - }2 o/ O7 V6 R- D
- let f = new Face(info);
% v. H1 F9 f ]1 l% P1 a/ @* Q- B0 o/ e - state.f = f;+ p( }3 Q2 c7 c/ K: e# z
- % I! c9 x' l" ~1 ^
- let t = f.texture;2 {2 @2 g+ G T% t: l' p5 T
- let g = t.graphics;: z( f2 C6 w2 Q! i0 L
- state.running = true;8 E1 m6 q9 }; O
- let fps = 24;1 K+ a: b$ u/ H1 z
- da(g);//绘制底图
7 r, D% s2 j% h( \0 | - t.upload();
; I' a, |0 f5 a% } - let k = 0;
1 ]& {6 s$ x3 N- H, R- x% @ - let ti = Date.now();
8 T" ^# u/ m( L3 v; d - let rt = 0;
7 P4 L( ^9 { L0 N* A' Q - smooth = (k, v) => {// 平滑变化
5 Z& Z! ^6 ?1 J- P3 ~/ j% h - if (v > k) return k; L1 X0 d" n6 e4 t6 V
- if (k < 0) return 0;; }/ ~6 ?$ f4 P) i8 o& F
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
5 G" ]# ~; l- z& Q, j }+ C - }8 o5 Q2 n4 J& x" o: ]/ c+ r: O
- run = () => {// 新线程
* \+ v) i, W5 M( X& g - let id = Thread.currentThread().getId();
. Y* x$ ?# m8 K) s" _* M) T - print("Thread start:" + id);! i8 P }1 n! ]$ l; {
- while (state.running) {
: A! k; q( G9 A `& Q k - try {: C( j u' _, |
- k += (Date.now() - ti) / 1000 * 0.2;
6 s2 h" x% I3 m( k8 B7 ` v - ti = Date.now();/ D7 Z s( [1 h1 ^6 e$ {
- if (k > 1.5) {- G y: z' i' I e* s) e
- k = 0;
8 K: i6 X r9 N* X+ G3 _ - }
* S/ ~8 O) U* w. L - setComp(g, 1);$ j; {( e% v7 ] M
- da(g);1 r; L: j/ _1 a9 g& G0 Z
- let kk = smooth(1, k);//平滑切换透明度
/ {( B5 X: }$ y: r$ g) L5 B - setComp(g, kk);
{' p# [/ M) j+ s! M - db(g);2 a% B' D8 N9 P* P; w
- t.upload();5 X: a1 s- F; g" y
- ctx.setDebugInfo("rt" ,Date.now() - ti);
0 e% x% `' ?+ @ - ctx.setDebugInfo("k", k);
0 n8 Z& X0 M7 f# h1 f; G - ctx.setDebugInfo("sm", kk);
$ J, M% d& @" E! ^% ? - rt = Date.now() - ti;
' \/ |% H% S% J& C3 }: }: a - Thread.sleep(ck(rt - 1000 / fps));. d" G% S9 F2 c& V4 A: ?3 b
- ctx.setDebugInfo("error", 0)
. [3 j. o/ ^' _( a* X - } catch (e) {
; L+ L- @$ T( f9 E) ]; D - ctx.setDebugInfo("error", e);
$ b& W& t/ J" k! Q' k2 O( M8 t - }$ B* @4 y7 @4 r. Z% E* W
- }
& i$ ?4 L; M" F4 { - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
- i, I% j( X' h2 S% I% o - th.start();
4 }% l% N# c4 ?5 l& H$ u+ O$ |! r - }# R' I: x! q/ Y& |1 X! Q
5 U+ C8 N9 Q9 v3 |. p- function render(ctx, state, entity) {
& p2 a+ I8 p! x' V) D E6 p5 W5 J - state.f.tick();* k( T# w& @, ]% }/ B8 R# ?# P5 w
- }' ?2 J' J$ `/ O3 r$ r
6 [- J4 n( E/ n, x3 f% ~- function dispose(ctx, state, entity) {2 q; y% L3 Y6 |
- print("Dispose");+ j& u1 J+ X- C7 K
- state.running = false;
) _% i& N9 @5 u2 w3 I9 Y - state.f.close();, g, c' w: Z0 ]0 |/ j
- }9 ?0 e1 L% E9 n- r, M
- * i& _. T- E3 H6 k9 ?
- function setComp(g, value) {
/ F# `! E, v. k" s! g - g.setComposite(AlphaComposite.SrcOver.derive(value));$ y3 K7 m5 W7 x2 F
- }
复制代码
: V# r! F/ P) ]# R5 Q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)
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