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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。
/ {! @+ p4 f1 \4 o- importPackage (java.lang);% c, | @% W% D! }* k& L6 c7 p) e
- importPackage (java.awt);" _" _1 Q! t7 O# e& ^
- ( J# n( U; ^+ h/ }9 X4 u H: _
- include(Resources.id("mtrsteamloco:library/code/face.js"));/ w) l/ c8 P0 o" P) a
9 w- a" N+ E$ ^) w+ @; Q$ ?8 Q- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {! X1 T0 O' w* l: [8 }5 R
- let frc = Resources.getFontRenderContext();
* H P6 O9 S5 d; m. p$ r+ ]0 I - bounds = font.getStringBounds(str, frc);( I; a$ X! r" R5 e
- return Math.ceil(bounds.getWidth());
" O+ a) O' `4 \% c2 N5 n/ F - }# E2 k/ y X5 {( W: z
- % l9 X8 J9 G. _% E- E: W! b8 I
- da = (g) => {//底图绘制
& X/ C+ X& I; r - g.setColor(Color.BLACK);
" c |% K% A$ F* G. v2 {2 X, n7 { - g.fillRect(0, 0, 400, 400);" V. [( Q2 _- l2 ?
- }
# N% k8 P, P8 l9 R( {3 n8 @ - 0 _0 |" z: m" ?/ P
- db = (g) => {//上层绘制
2 u [2 O1 t# C6 A8 d H7 {9 t7 N - g.setColor(Color.WHITE);# r3 U1 ?; d' O* o r
- g.fillRect(0, 0, 400, 400);1 P' O7 P$ }* q. R) ?
- g.setColor(Color.RED);
. i7 o2 ^) d3 j8 O2 E: V% I - g.setFont(font0);
/ B* ^* Y5 P l+ X. Y' @5 a - let str = "晴纱是男娘";: T6 M: ]6 e- p: G y" l
- let ww = 400;: H8 f0 t, I. B3 t1 [( O* i
- let w = getW(str, font0);
6 n6 o$ H y+ q3 u( |! g4 ` - g.drawString(str, ww / 2 - w / 2, 200);) C% H8 b2 G1 F
- }, I5 d4 w ~" G6 x( k+ x
0 U: y1 P H; d# a- g5 s- const mat = new Matrices();
0 }( T- V1 w! x' }/ Q! c9 X - mat.translate(0, 0.5, 0);! ]! P6 C0 x/ W. J
; f; O* D9 z7 G3 H( [- function create(ctx, state, entity) {4 O4 |( z# h* y& I, ^
- let info = {. E L; j# H7 T9 `5 q; K/ l
- ctx: ctx,( {7 m4 G( W$ b# l# E/ \
- isTrain: false,+ Z. S1 ]* N" J4 D* L
- matrices: [mat],9 W+ N- K( u; I$ s4 y, f' x
- texture: [400, 400]," `1 B* @2 D* d% ^7 P$ T
- model: {
9 T I# F4 F# w2 ` - renderType: "light",
+ x( T- ^. B( Z ~8 h - size: [1, 1],
' |2 e: D6 }4 D9 s- t - uvSize: [1, 1]1 d- X% |6 z- ?9 G' n' A8 p
- }
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- let f = new Face(info);
2 y8 W# ]0 v2 F. t" G - state.f = f;
: z! I' }( Q; _; w6 D$ D
/ X5 q2 V" b6 U3 _) Y- let t = f.texture;
+ \9 u' j4 z* H1 e0 Y- u' { - let g = t.graphics;
! D2 o8 l: P" P( h t6 [ - state.running = true;1 k9 {: t" g1 d; ^1 e$ D3 @4 F+ t
- let fps = 24;
9 }8 Q h: R: [* L/ S - da(g);//绘制底图
7 C8 G% q% L @8 p9 M/ H! g1 c - t.upload();- C% {8 \8 L0 v0 N
- let k = 0;7 F" O' f4 [1 N% r" X
- let ti = Date.now();/ z! ?3 s4 D5 ^/ n, T9 L* h
- let rt = 0;
& H4 ^5 r$ o2 W# k: J - smooth = (k, v) => {// 平滑变化
1 n# k( `' e6 J& J+ c* B* g - if (v > k) return k;( N" O4 h4 }' F
- if (k < 0) return 0;! E: ?# g! W; @% \; l; {
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! e4 k6 t6 [0 d8 N' K Z ~ - }& }+ d# h) R# e2 k: Z l
- run = () => {// 新线程
& U5 K$ V1 u" @2 l" s - let id = Thread.currentThread().getId();
8 a' k$ A# [9 c' r, e5 e - print("Thread start:" + id);
* u2 d! |6 w( D( t - while (state.running) {: G/ N1 k! B) g' i- M* c4 \2 o
- try {/ f( ~3 S, v! W1 s4 m5 R( q
- k += (Date.now() - ti) / 1000 * 0.2;/ \' M" P( H& \0 \. R
- ti = Date.now();
, S9 p6 D5 ]1 h3 ^ - if (k > 1.5) {: @) ]; U T4 s7 Z
- k = 0;3 s6 }- `, G6 h: ?, ?
- }6 N8 X6 \$ T) o0 M! T
- setComp(g, 1);
$ L8 {: a8 h0 X) G u* h - da(g);: O( K5 X) T5 N
- let kk = smooth(1, k);//平滑切换透明度
% _7 q v+ B U/ O9 u7 G. y' g - setComp(g, kk);
" K% Q% i" n& ^ - db(g);6 D( J3 }2 X+ U: m
- t.upload();
7 z' z( a( i" |) h - ctx.setDebugInfo("rt" ,Date.now() - ti);
8 F$ n& W8 b) A0 K' F; G - ctx.setDebugInfo("k", k);# R% I$ k1 q7 J7 o- @$ n$ f
- ctx.setDebugInfo("sm", kk);& l) o% ~* @- K
- rt = Date.now() - ti;
' F( m$ T3 U% \$ F2 R/ o6 ` - Thread.sleep(ck(rt - 1000 / fps));% d+ } Z5 @; B- H, h7 U1 S
- ctx.setDebugInfo("error", 0)
9 g5 r+ C2 F6 ]4 k8 ^) W1 b0 z) n" I - } catch (e) {! Q: }0 c: ?9 ?
- ctx.setDebugInfo("error", e);
& p& {$ A; x. H. W - }
+ q+ u8 x4 R& {) Z4 Y - }8 m7 s; c# U' b* g% l7 A
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");2 M1 f2 f- b- ?! F( @5 b
- th.start();
9 n$ g, d3 _$ p; ~6 n8 x1 @/ j - }
. ^/ k4 d3 a6 q- L
* D; O3 i& u3 x+ r- function render(ctx, state, entity) {
% N0 K5 ?7 U3 d F - state.f.tick();8 @& \: j0 j# O) x/ i& T* a; f
- }
% b4 @6 x" x/ C; r; w% x
; C2 G2 z3 b W5 t# T, @( t- function dispose(ctx, state, entity) {
/ o& g0 }5 ?8 E+ Z: D - print("Dispose");) p# Q% g$ ~4 k( S, A
- state.running = false;
* @: F' N/ p( g7 J: @- ?1 ] - state.f.close();! T8 t. @7 m: D+ W) J* L' j
- }, }( y/ r% u# r7 M8 i- \3 y
4 Y" \ K1 P7 Y1 Y3 }1 R- function setComp(g, value) {
& s |- A8 k0 y$ X8 s# v - g.setComposite(AlphaComposite.SrcOver.derive(value));0 w. j9 k% \) E; b8 x; y9 o% {
- }
复制代码 * p& d+ z2 {, y
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。, U. Y! N, s b N! T
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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)0 U1 l* m7 \- Y, L, {5 t; k* F
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