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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。! C; o& X( a% b/ T" `2 b i# P
- importPackage (java.lang);9 M# @4 N. i3 ~. D8 |4 I2 ]8 }
- importPackage (java.awt);
! D* r! l1 X r$ G- w - 3 k# T+ C. @, M6 s4 N
- include(Resources.id("mtrsteamloco:library/code/face.js"));6 `( ~; A1 N3 A7 [4 n
$ V- A+ B3 _/ N) {, I- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! d" R( c @& Y
- , p. W( l- `2 E4 Q$ a. R
- function getW(str, font) {
5 d. z4 j9 S$ r - let frc = Resources.getFontRenderContext();
; ~6 E* \ `; F P; F% p - bounds = font.getStringBounds(str, frc);
$ q- F! w! @( V# x2 j; V* g3 z - return Math.ceil(bounds.getWidth());
" c. l( o! O1 k; f; T - }
0 M5 Q' n/ e9 V2 ]" o
$ u5 Q2 V9 d3 [( E3 i# C; R- da = (g) => {//底图绘制
- ]2 l7 h6 u5 R1 [" f+ G: u* Y - g.setColor(Color.BLACK);, o: g7 h4 t. J+ D7 }& @
- g.fillRect(0, 0, 400, 400);! x; f8 O( Y/ }6 Y+ V
- }) w* T; p; e$ Y' @
- / [! W* L5 z, G b
- db = (g) => {//上层绘制
, M2 \* b' ]! F$ b0 X6 k - g.setColor(Color.WHITE);4 ~- E$ Y" `- R0 Q2 K' W
- g.fillRect(0, 0, 400, 400);) k6 z1 @$ l/ I
- g.setColor(Color.RED);
& X& t! B+ W0 i6 o4 A, ~ - g.setFont(font0);2 a+ G* u4 s7 V6 G' ?
- let str = "晴纱是男娘";
8 Y4 A1 o5 }8 H( |8 W - let ww = 400;2 X. v( f" C9 y3 B4 o ?$ @- v* d
- let w = getW(str, font0);
" h" r$ D# q7 b X) w - g.drawString(str, ww / 2 - w / 2, 200);! W! ~4 t, V+ |. ^3 G
- }
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! j; v, r: F; [$ G, A, y( Y0 G6 \- const mat = new Matrices();
" X+ {7 C6 ]/ o$ L* X4 Z - mat.translate(0, 0.5, 0);; M$ l3 p( \6 \0 P+ n; A
- 0 k) _" ^ Q/ \
- function create(ctx, state, entity) {! B& \6 }& F2 F: l
- let info = {! g4 o8 L) F2 k7 x4 O" ?
- ctx: ctx,
# h& N" m. I, A. e - isTrain: false,, L8 Z! |* o1 x. ~3 g, }* V
- matrices: [mat],& ]$ [- Z' d8 J* \8 ~4 e0 T
- texture: [400, 400],9 V! E, y6 o, ]
- model: {. W Q {% |0 Y% b( i
- renderType: "light",% P j( L! x# K9 U7 }
- size: [1, 1],
0 V9 L. ]5 y( } k; y% X0 p - uvSize: [1, 1]3 k8 p8 N. R2 N: o; v, G0 {+ l
- }
5 b. I: C) x/ u+ I- E - }, G8 N7 V |6 p. B z
- let f = new Face(info);
* M( c4 E3 r! a, u; ^% O6 I - state.f = f;& {$ r+ r: q! n o/ [
- " Z+ ]/ s' j4 p# E' h
- let t = f.texture;) Z' O* X# Z& {( F& V; F8 I
- let g = t.graphics;
% M+ L. _/ V% N* s1 e& T; } - state.running = true;
" i2 z1 a4 z7 i2 k: D' g - let fps = 24;
0 t! B* ~- D/ T7 R' V; j) t - da(g);//绘制底图
+ _( w) @ ^4 L - t.upload();
; G. Y8 C2 a g4 _$ j - let k = 0; E: J6 {# y: W0 V
- let ti = Date.now();, F* F% @& ~, i$ M* x7 I. W
- let rt = 0;6 K' A w/ P S; O7 c$ v3 A9 n5 U
- smooth = (k, v) => {// 平滑变化+ u$ z/ @# O3 U; L9 ?
- if (v > k) return k;# r. | i& ?- m' `# E* C
- if (k < 0) return 0;: l! C4 X6 o9 e7 v, p( G6 H
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
- ^1 M8 k N" t$ r) D: d3 r( F - }: @7 D! D0 v7 u! H( A9 E
- run = () => {// 新线程
b4 x" a0 e/ u0 U - let id = Thread.currentThread().getId();
. W, Y( D& {& K# U& L - print("Thread start:" + id);
9 l# t, w3 H8 L8 J - while (state.running) {# R N/ r' R& `. ?$ \2 Z6 e
- try {3 }+ N/ k9 x$ ~
- k += (Date.now() - ti) / 1000 * 0.2;( x% S, Y, y7 i! e! ~
- ti = Date.now();
5 B7 t# V5 V8 @( J( Y4 v' n8 d - if (k > 1.5) { M$ c) V' p9 f* B: j
- k = 0;
; x) x& [) R1 o( `% I- m% }7 z - }8 k7 q8 d5 I% _* a6 _5 F0 Q
- setComp(g, 1);8 L3 b! b2 c, c) N' v
- da(g);" o3 L) T7 X5 l) T
- let kk = smooth(1, k);//平滑切换透明度
. Z% G$ Z2 _1 F+ Y6 n - setComp(g, kk);( { E9 _5 B5 p3 U- j1 J
- db(g);# f4 c# A4 C% E( s* f
- t.upload();; l2 |' d; U8 f" J D; N
- ctx.setDebugInfo("rt" ,Date.now() - ti);1 u# U; g% F7 N2 o9 ~
- ctx.setDebugInfo("k", k);
' D6 R$ J( }# C' D) a% w - ctx.setDebugInfo("sm", kk);
, C5 V6 G/ o% v* X4 @ - rt = Date.now() - ti;
; s1 A" @* ?$ I7 P# d& X! h - Thread.sleep(ck(rt - 1000 / fps));
& m( s1 a g5 n5 O8 a3 W8 Z% I - ctx.setDebugInfo("error", 0)& Q2 W+ T! s- D) [* P2 w
- } catch (e) {
0 z& y7 C, _9 h/ p& t - ctx.setDebugInfo("error", e);
7 Q3 }5 F. G3 ~7 ~ - }( A0 v: Q+ w: q1 N; B( O* G- \
- }
# J. C; k2 D" f' N1 [ - print("Thread end:" + id);
' m+ ]$ y; U+ G4 [6 U U - }
" F5 x. M$ _3 `1 j, n - let th = new Thread(run, "qiehuan");- \$ b |2 K8 n3 J( d
- th.start();" R! J. U) A; l) t7 J h
- }; Z4 b8 E- {$ P9 s# K
# a/ U: @9 r7 l$ \5 y9 w- function render(ctx, state, entity) {! q. ~. ?+ t4 A1 s# e3 l
- state.f.tick();
! l3 q1 `9 Y7 Z! b( X* p' E - }
% _( y; p5 b: g; W - ( A# P" k- e9 f6 \4 i' g" I
- function dispose(ctx, state, entity) {2 V+ [/ ]% R1 P4 O) p: `# }8 y* I$ i
- print("Dispose");
7 N5 e3 [' P) R8 i+ {: { - state.running = false;
& t% w# {. m, I. q6 }' N - state.f.close();3 o" v' ~ Z; o* Q# _/ s
- }6 J" ?- m7 x4 x
- * }- |7 \: d( p) B
- function setComp(g, value) {
; _. E1 f8 Q0 `! l& m% s - g.setComposite(AlphaComposite.SrcOver.derive(value));7 L) { I2 U' y4 g" _' O0 K
- }
复制代码
$ }% `) p, i8 U& A8 M8 r7 J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。/ ?, v1 |2 M! v9 t+ V0 g1 G
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+ B' @" ^5 x6 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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