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m* E3 G5 |+ o( v# p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。. ^8 N, V% s" w3 E3 x
- importPackage (java.lang);
% R. j6 T3 s! a5 C0 { - importPackage (java.awt);
# l3 E) l3 c ]" x+ }
]+ z x# V4 r/ \1 B/ \- include(Resources.id("mtrsteamloco:library/code/face.js"));) D _5 [$ i: p' _7 T
/ l( I+ f }$ Y% r: P- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
" H! a M1 {- f! {* g4 R6 N
, T5 I$ A- t8 |( E3 R/ F- function getW(str, font) {
( d2 k3 c7 T6 L2 e) z7 M0 P+ V - let frc = Resources.getFontRenderContext();
, z o; e S6 F( M) G F - bounds = font.getStringBounds(str, frc);- H5 ~' [: |; S% A
- return Math.ceil(bounds.getWidth());: |- m2 b, {( Z B+ T9 J _( V1 A
- }- R8 o9 S$ W3 X3 Y9 d
$ ~& v; O F5 R* T# d# k1 q- da = (g) => {//底图绘制, q( f" z6 Y% N: J) z
- g.setColor(Color.BLACK);
7 J) W6 p4 {+ s - g.fillRect(0, 0, 400, 400);9 P: i p0 T/ |% p( m7 x! A
- }- I% o+ i# e/ a& \' ~% s+ Z
$ u/ J7 S$ {# \. E& f9 {2 h- db = (g) => {//上层绘制$ J& E* }( B6 ~- |$ N1 Y
- g.setColor(Color.WHITE);+ u+ t+ a& X* N- T" j6 y& @
- g.fillRect(0, 0, 400, 400);
7 O8 u3 U6 g& ]5 @9 w - g.setColor(Color.RED);8 D) J W4 Q# n% [
- g.setFont(font0);
* v9 t3 M' K) a5 t - let str = "晴纱是男娘";
# ^( G4 q5 Q% A- B \ - let ww = 400;
! P3 w* A& @8 p7 v" N$ `2 a - let w = getW(str, font0);
% Z' ]% C- Q+ V1 v: ?; o - g.drawString(str, ww / 2 - w / 2, 200);/ O* e G* n4 A8 B. j
- }% R) f3 S: b) z/ J* C$ a
- / M8 T3 h. O/ t! }* f* G0 \* ?
- const mat = new Matrices();; i/ T. J) `2 z Y: L; w
- mat.translate(0, 0.5, 0);# U: y W* v7 B; _, c2 `8 @
- + ~" \. U; T, ~2 i2 z& Z$ o, W
- function create(ctx, state, entity) {
& T7 @; B5 Q+ m - let info = {7 A$ w! S9 Y4 B$ j+ V8 z7 K$ Y
- ctx: ctx,
& q; {4 F( ^" u6 j - isTrain: false,- X/ v2 G: \3 U2 ^+ I
- matrices: [mat],; n/ y( m; P0 Z
- texture: [400, 400],
/ a% k7 \5 p7 t5 o& ?, y3 T4 H. V( H8 b - model: {
L! x9 p: K. T7 a& ]) s% _ - renderType: "light",% M, `# e" R; k) i. [/ Y
- size: [1, 1]," \ z* V" d( i2 K0 Q$ e
- uvSize: [1, 1]
! h9 C- B2 @. @" _ - }. T# r7 [$ x% v4 R! X0 l- ?3 E
- }1 y: O e0 |+ h
- let f = new Face(info);
$ V0 b# a3 W0 @4 @/ ?* H+ | - state.f = f;
; u0 h, }, n1 u! o - & L$ j5 v' E/ P F" b
- let t = f.texture;) x+ @" ~$ a$ W
- let g = t.graphics;1 j: U2 s8 y1 L3 _
- state.running = true;
, n1 S% z/ t3 w# L0 s - let fps = 24;" d3 y0 q9 k4 Q$ w5 F6 j
- da(g);//绘制底图
7 l2 ~' ]" T/ ]' [ - t.upload();
- l# _8 U6 Z0 O6 e - let k = 0;
" l8 |; c. D6 h1 l2 r - let ti = Date.now();
! f, {3 b1 ]6 T3 q/ i2 V - let rt = 0;8 ]. {% D* v& `3 ` N; _
- smooth = (k, v) => {// 平滑变化4 _6 k7 V7 a3 G8 Q
- if (v > k) return k;0 a% Q+ L. g0 H3 E/ }5 b" {
- if (k < 0) return 0;
& y/ \( W$ i. K% Y - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
1 m7 C- `9 H% e - }
0 _ e8 k* p' s( {/ D" x. q0 i2 P - run = () => {// 新线程" h' g7 H- z# k' D1 B$ C0 D
- let id = Thread.currentThread().getId();8 ~; F* `7 ^" k; \+ G+ k O! I$ g
- print("Thread start:" + id);7 J$ W4 o: j( m3 I7 H, s
- while (state.running) {1 Z# m! Y) m+ H! Z6 o1 ^( x
- try {2 C* h# t. b& L
- k += (Date.now() - ti) / 1000 * 0.2;
1 B( w2 X1 I5 l$ c/ h - ti = Date.now();
- S9 o1 \, P8 ]/ G - if (k > 1.5) {( v& e7 ]2 N" \! ~- U
- k = 0;" F! r' ~$ q: o
- }
7 B, n/ r, j& V) ^) j& A' S - setComp(g, 1);
2 m n' l" N; p$ k6 V$ t0 @' w; k! v - da(g);' H6 h9 ]8 z+ E, m& t
- let kk = smooth(1, k);//平滑切换透明度
2 A; ?: Y! M) ?- c5 J( p; ] - setComp(g, kk);, E- e1 F, j6 l* J
- db(g);( R1 a$ m+ V, \; }3 a& W
- t.upload();
; v- |. i6 b# w' \, x - ctx.setDebugInfo("rt" ,Date.now() - ti);
' D9 D/ ~5 L' s4 F - ctx.setDebugInfo("k", k);
7 }- w# m5 O) B2 `' {0 |3 \ - ctx.setDebugInfo("sm", kk);
- x. ]' E( k0 e - rt = Date.now() - ti;7 ? t; M- z" n4 n% Y( n
- Thread.sleep(ck(rt - 1000 / fps));* F1 a/ U: _! N1 Q
- ctx.setDebugInfo("error", 0) w1 d+ M1 U( |7 D. V, Q1 s4 x2 ]6 \
- } catch (e) {+ I' p0 T- D& z! a
- ctx.setDebugInfo("error", e);
6 _; R& [! ]. H, D+ |& s0 |! i - }- X6 b% N* B) i# y" y% P
- }
8 Z' G* s2 w) _, _; V - print("Thread end:" + id);3 Q* L' c, K( r/ l& ]
- }% E) f" X% i; v$ J: S1 z8 V: G
- let th = new Thread(run, "qiehuan");
4 i) r! f2 w# v! F/ n8 M - th.start();
7 o: H q6 w- t( D. Y" J0 w - }
1 Z5 M- K% F8 h: o! x5 ^. S
* B* z3 C H! @" P3 \6 x- function render(ctx, state, entity) {- C- V" O/ u2 Y+ C
- state.f.tick();
! f8 ?; I7 u- L. ]% ?9 D - }5 w" v; K$ h4 M5 K S
9 v6 v" `" ~" @! Y% b- function dispose(ctx, state, entity) {
. F1 X5 H" ?6 ?* D+ l8 E - print("Dispose");+ x& }+ l; y- B" g1 R
- state.running = false;1 l0 s" H& D/ E9 G2 }
- state.f.close();
7 K5 ]! y; g1 v) j' P# E, T$ T, s - }# J3 I, P3 y/ \7 A
% V1 Q% Y6 X3 c% ]# b }- function setComp(g, value) {
A; b' B+ J0 Y; c - g.setComposite(AlphaComposite.SrcOver.derive(value));4 j+ @1 F. Z+ I3 r
- }
复制代码 3 s- u( |" o* i- T
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。; F+ S' o9 [% N8 N0 r8 s
: D0 k- z' k& k9 T# a+ ~; J& E: s1 X* D+ F0 @
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)8 [5 W9 w* x8 ^& o! l' h% T2 y
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