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" Q! I8 @" ^8 l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。
/ E" k( d! Z" D0 `8 n' L% |" w/ I0 l- importPackage (java.lang);, R( i# P) d; T! ~
- importPackage (java.awt); s/ c1 N& j, N4 \# X$ y/ U
% o% i& E; Z- q6 ]1 s0 R, B+ B- r- include(Resources.id("mtrsteamloco:library/code/face.js"));6 w$ n- n- q- ?7 y% u8 g
- " c- ^3 N+ F5 R8 J6 m- [! n+ [# f
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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: b g1 g1 u6 {8 R {/ v3 T: f- function getW(str, font) {6 f+ r2 r3 u- e4 I
- let frc = Resources.getFontRenderContext();# y C4 Y5 q3 [1 Q
- bounds = font.getStringBounds(str, frc);
! b$ m% t. {1 z5 j6 W+ T G - return Math.ceil(bounds.getWidth());
0 ]" ]* ^- |6 P% f% V5 f( o - }
* n, s7 @3 V* r; R+ H( X - 9 F2 n u8 J0 K$ U/ }( i+ i
- da = (g) => {//底图绘制+ q8 I$ O7 Q: I, ], E$ o$ n8 [
- g.setColor(Color.BLACK);
! V$ g: [. Z' v% c% [; n( o - g.fillRect(0, 0, 400, 400);3 A; x6 t/ c% u& N. k2 Y
- }1 u# ~7 T+ j8 r" o% V% ?
8 s2 C- i4 b8 ]/ L, a8 U- db = (g) => {//上层绘制- _; ^9 n% W5 h* z4 R- L
- g.setColor(Color.WHITE);
+ u8 q [7 i9 I% j) t/ q. `: Y - g.fillRect(0, 0, 400, 400);
& U/ G& b" I7 G/ l" L' | - g.setColor(Color.RED);# F+ E# Q; u- h o$ X
- g.setFont(font0);
; g/ `, u* N, x - let str = "晴纱是男娘";
p0 ^+ t# p* b9 b& s7 }) f - let ww = 400;, `+ b+ y6 u' g; h D7 z+ R! x5 u
- let w = getW(str, font0);
% @0 J* V1 G$ L - g.drawString(str, ww / 2 - w / 2, 200);) J% ~+ m# z1 V, V9 |1 i t
- }; _4 U2 S- W4 c7 o& C1 M
3 ^! H5 X$ G6 D4 e/ p* S' c- const mat = new Matrices();
3 ?# b3 t7 D+ N" t4 q - mat.translate(0, 0.5, 0);# L8 A; H. ?4 t( p) B+ I6 d
* ?5 Z, n& c( | `* C- function create(ctx, state, entity) {+ {0 n9 P6 T4 q: M/ q* i5 h
- let info = {2 S5 F) K/ @5 e) F$ v( M. S0 ?# `
- ctx: ctx,
u3 z% }6 G7 j r6 b% E( E5 M - isTrain: false,
5 ~1 L. `5 K, i- V3 B - matrices: [mat],
' r/ W* C$ I3 u; o! T4 g2 \- U - texture: [400, 400],
. }- K1 e! e8 i9 i - model: {: o7 G O6 g* {7 z$ Y
- renderType: "light",
( Y7 y; v9 {( | - size: [1, 1],
( F2 a+ \4 c$ b# g) @1 I! T - uvSize: [1, 1]5 {$ } y, t" M/ D: z* J
- }
1 T+ ^1 S' r. {7 t8 l8 h - }9 i, ?* l: U& m% ^5 Y/ Q
- let f = new Face(info);
# E! J$ y v9 { - state.f = f;9 N5 }- g1 _; k) r
- & q' ]6 F3 N$ g' n* j z
- let t = f.texture;
1 p" c5 Z5 q9 m! d- u5 |0 H4 R - let g = t.graphics;$ ?0 m2 Z* _* I) F' o0 M8 J/ d) W
- state.running = true;
5 g2 \8 g: F( l! T7 q - let fps = 24;
5 Q% b/ V5 `! d) N0 f - da(g);//绘制底图- f; n. q+ z4 O2 U) w
- t.upload();
9 i6 p6 {1 A& _) `' k - let k = 0;
8 n4 x0 G' o' F4 e& H* o3 {+ z - let ti = Date.now();' o% R1 A) Y8 G' t" L
- let rt = 0;
5 `) u* J5 A6 B) C ^ - smooth = (k, v) => {// 平滑变化
5 \% G7 A. u$ ?8 n0 e2 l - if (v > k) return k;
& g; X& _2 y7 w - if (k < 0) return 0;
+ t0 G' h: t: ]# g G - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% p" i+ D; s5 r: R1 Z
- }9 R/ M- {* S; p/ }6 T( q- J0 x
- run = () => {// 新线程
' y! a) E1 M& t; b3 O - let id = Thread.currentThread().getId();
8 q6 _% h0 h, W! v. A - print("Thread start:" + id);
( x, Z' R$ d, z; F* e6 p - while (state.running) {! _' {0 H7 B2 E
- try {
X3 G/ }6 p9 {# c; [" B- S. e' _ - k += (Date.now() - ti) / 1000 * 0.2;- p) q- ]8 O$ [
- ti = Date.now();
; l5 `8 _1 h' y) Y3 e0 { - if (k > 1.5) {
0 f% @# \, z6 T0 @/ y/ U% G6 q - k = 0;8 H- P; \/ X' O4 @
- }! k: u* p6 ? u" d7 j
- setComp(g, 1);
& Y; r/ C2 N/ h - da(g);8 Z# ?9 `" Y: u
- let kk = smooth(1, k);//平滑切换透明度
+ J3 J* X H" ^) ~( S - setComp(g, kk);$ Z8 m$ n7 w. u k% L! @
- db(g);1 Q2 M5 G" Z8 q- X" ~! N
- t.upload();0 q% L1 m# F: A4 }$ _
- ctx.setDebugInfo("rt" ,Date.now() - ti);
q V5 j7 X& a% S" { - ctx.setDebugInfo("k", k);) ^: h# O3 W* }5 f. y! }
- ctx.setDebugInfo("sm", kk);
( m b) M: w+ O+ a* e; g8 I - rt = Date.now() - ti;
2 J% o9 m$ ]8 j" o) e5 z. u - Thread.sleep(ck(rt - 1000 / fps));7 H/ J& ]0 ?' H7 i7 `1 Y' b
- ctx.setDebugInfo("error", 0)
& S D4 h1 ?+ T# L5 P2 M* T - } catch (e) {" P; `1 V, a2 V2 Q
- ctx.setDebugInfo("error", e);* z D2 J/ E% U N$ d+ }
- }
; g }6 ?1 B/ ]5 b$ `4 ` - }1 Z) E* _5 x2 N8 b5 M B3 i
- print("Thread end:" + id);7 y1 ^) _$ S6 a
- }" {9 o8 ?6 A/ S
- let th = new Thread(run, "qiehuan");
" S; b. ]+ f! t$ c& a - th.start();
8 P3 C! m F4 ]+ |9 [! w9 |; t - }
0 ]1 r/ e+ }% ]) G - 3 B% M t- O7 L7 ^: S
- function render(ctx, state, entity) {) J! H' x1 k; f. ?9 p
- state.f.tick();
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- 7 O2 @; J, L; d, P, F' H9 J k
- function dispose(ctx, state, entity) {6 ]/ {( Z' q& t5 U
- print("Dispose");
" E7 u% K+ a4 L- z& t/ _ - state.running = false;& c# G9 J' F! B) { r
- state.f.close();- X* }) n ~/ B( W7 q
- }
( q g1 Q5 w6 V" C5 O - ) X- D9 P8 o! N' H1 |8 Q( j7 v* l
- function setComp(g, value) {
- }8 h: W' N- i; |' f - g.setComposite(AlphaComposite.SrcOver.derive(value));
0 W, a Y, L$ y% Y - }
复制代码 . Z" z& t9 v# ?9 A8 F2 I* r
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。
: L! x0 {1 T$ b( d) ?; _& s' }5 P, _8 e/ P
+ z5 W1 [) g. i& L0 q8 i顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)/ M) E+ {# w9 d* D+ u1 I! q
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