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! p) c# d( S+ L$ x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。
# a1 ^3 v8 {4 F- importPackage (java.lang);* Y# i' V( L. ?$ S
- importPackage (java.awt);- j% I9 f9 [ j: G6 T
( F' C0 U# o0 r- include(Resources.id("mtrsteamloco:library/code/face.js"));
7 }2 P/ c* K- { p9 _ - 8 J, _) i6 O' H) V5 {
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);; X1 R4 F- L) o g7 o% S" }
- 3 { j3 l W9 I: m3 E) c
- function getW(str, font) {
0 T6 d9 g6 v& ?2 N, L3 V& m4 |4 g3 B - let frc = Resources.getFontRenderContext();
& O5 `: P! p' X7 S - bounds = font.getStringBounds(str, frc);. I1 A' M' y1 \
- return Math.ceil(bounds.getWidth());$ V* ?0 |) p; I! l. a7 `' ?( P
- }3 i& Q( F3 @) J6 X9 Y
- " E$ f; P: E8 G4 P
- da = (g) => {//底图绘制
# J* M/ L( y2 b+ d; W8 Z5 B - g.setColor(Color.BLACK);5 I8 r" @4 t* W }
- g.fillRect(0, 0, 400, 400);
; P! L, [2 d, S0 D" j; b - }
& D# w& g" W3 |3 \7 j+ U* B - , f) I7 R3 k0 P& }
- db = (g) => {//上层绘制3 e0 s/ q5 J3 O! A. ]
- g.setColor(Color.WHITE);
5 m; @# J* G5 I' D4 T9 X - g.fillRect(0, 0, 400, 400);
7 M5 B, [% I; q# J - g.setColor(Color.RED);
5 O2 Y* R8 e& ~$ b - g.setFont(font0);0 w' y* f/ f3 [- b( C
- let str = "晴纱是男娘";
* o! k/ T: K. j - let ww = 400;
|2 l, F: }: E' @! @0 @ - let w = getW(str, font0);0 I; Z7 j! e0 M6 i
- g.drawString(str, ww / 2 - w / 2, 200);
% k$ Z& K6 v u' C' ?$ x" m - }
1 \* q. a: H% @+ @ @
R9 ~ J3 m9 \2 q4 t- const mat = new Matrices();0 i3 l* y; ^- y' e w/ L, L5 q
- mat.translate(0, 0.5, 0);
$ C! v! O0 }" k% Z1 d
) f: O8 X* m) W5 F. X6 C- function create(ctx, state, entity) {5 e2 X+ T" T8 s- _" T: t, e1 f0 _
- let info = {
' n$ ?; f0 r8 N4 G% @. A3 r - ctx: ctx,- T3 C L! j$ L# p
- isTrain: false,
, G+ k0 V! P5 k. n% q3 V - matrices: [mat]," p( [) l4 ]/ ]! Z' U! J
- texture: [400, 400],
. ^+ r" H, a' B - model: {
- l2 e$ c$ B5 W; J - renderType: "light",/ b$ ~4 G5 p+ r+ I
- size: [1, 1],
3 K- F& t& u# r# x* R8 {' B - uvSize: [1, 1]
( Z6 W; N" V8 H; V - }
3 d' L6 A0 R6 H$ V - }0 E6 C+ M2 |, |$ F6 F
- let f = new Face(info);
! y) B) o+ U/ ~) X# R - state.f = f;
/ R8 @; S# S) R
% j5 @; b! S+ h; i* U& _7 t, }- let t = f.texture;
, _' p' E" g, \8 _* L$ B: C - let g = t.graphics;2 [& g4 X% w4 ^5 Y: J
- state.running = true;
. P0 x" a1 x+ i& A& w+ k l2 w - let fps = 24;
! V/ T" L; v7 E# k% a j - da(g);//绘制底图
+ S6 j8 V+ Z+ d% A F - t.upload();& I; J% F3 l" |7 d- g
- let k = 0;
: r+ o' `9 Y" _% R! G6 k - let ti = Date.now();# ?; e8 R4 w% [$ Y: m
- let rt = 0;/ S1 V/ ^$ O/ c G- U6 Y9 H
- smooth = (k, v) => {// 平滑变化 C1 d# P! c! H& C' ]( s
- if (v > k) return k;
. ?* B* j$ D( M* X" e. T5 n, f - if (k < 0) return 0; u e' V. _# i4 t3 n1 t# b3 ]. ^: I
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;+ v; C( J u2 K- |4 o: G
- }4 l" a: }6 [# n) P, Z' a% _
- run = () => {// 新线程6 U1 W, ^5 k' G% }7 G; D8 j4 ]
- let id = Thread.currentThread().getId();
- _6 ~1 o+ c; `4 B( H, q7 J - print("Thread start:" + id);3 a: z. Q2 R! z* N5 |: h" Y' {
- while (state.running) {& t+ m' C0 P" O6 a/ U3 C
- try {
# V1 r0 d7 T5 f! e/ ^ - k += (Date.now() - ti) / 1000 * 0.2;
5 U! U+ l0 N* @' w) C8 P - ti = Date.now();
* L a- Z( o0 j4 T4 n( U2 p - if (k > 1.5) {* ?* ?# e& M, S6 w6 J+ R; \5 x
- k = 0;% M- ~2 v- r, Q! @* H# _
- }
' Z1 z/ b" e3 O' a - setComp(g, 1);
# P7 a; ]( G' i# [7 ? - da(g);
; {$ g6 e5 Z0 X+ P9 C& I8 Q$ U5 b - let kk = smooth(1, k);//平滑切换透明度" A8 y# a1 L- d
- setComp(g, kk);
' u9 H( s1 @6 @3 t/ C" E - db(g);( O4 `- \+ X. |8 Z9 G. b
- t.upload();
. p7 e6 }* n/ o( S5 m* D - ctx.setDebugInfo("rt" ,Date.now() - ti);
4 ^% }6 {4 G; j& K; d; p5 O - ctx.setDebugInfo("k", k);
! o6 A4 N; z; t* T& @8 w - ctx.setDebugInfo("sm", kk);2 a& U4 K/ I, M- H B2 T
- rt = Date.now() - ti;
2 G- d' B# ^9 ?) F3 j - Thread.sleep(ck(rt - 1000 / fps));
. Y$ Z# i1 Y3 z6 l/ ~( E/ B - ctx.setDebugInfo("error", 0)) |+ ~/ \3 l5 S$ Y& w
- } catch (e) {4 ]% c$ M) |" G) W
- ctx.setDebugInfo("error", e);: Y+ r/ b8 V! C& w( R
- }
5 W5 P6 L+ X4 ^$ {3 V5 ] - }
- x) }- y, R, v$ Z - print("Thread end:" + id);
0 m- G2 N% i7 }1 N6 D; A - }. T0 l8 A! B% f P/ T/ n
- let th = new Thread(run, "qiehuan");/ R, E T6 M5 z. w& _! V) w
- th.start();! y; _# [/ G( F! `5 i' h; ?+ ^
- }$ ~+ |& a- U; A" b! R8 l x0 |
# v2 U. ?1 K" S' g- function render(ctx, state, entity) {
# i* J: Y/ G/ J' K$ {2 t - state.f.tick();
2 ?( X- W. l3 C5 i, K* q - }0 ]2 ]9 w! [9 I& |1 \; ^) C0 \
- 7 I. r2 w0 a5 a& r8 H
- function dispose(ctx, state, entity) {2 V5 u! W5 b% C, y
- print("Dispose");
. @( s& U7 Q2 ~. }5 X( w: Z - state.running = false;
& U% F9 r" o' e6 E* A: N - state.f.close();
' J/ k2 |0 y0 v& ]# K2 } - }
% S# v: I$ ^- ]. _3 V" m. l - / P( ^0 N- I" L/ }# X% e
- function setComp(g, value) {
" G4 ?$ H! W3 }$ v3 Z. r - g.setComposite(AlphaComposite.SrcOver.derive(value));. P( ]/ k( m9 {/ p- U& a1 ]2 ]
- }
复制代码
7 n' b+ Z) W5 L0 O" N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。
}# d) T X! p8 }
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, t' |; ?# u1 u0 [顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)9 z: i7 `* p, H
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