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! \0 L5 [3 c2 M. n, n% J4 U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。
* }% Y/ m- k6 |/ U! P! K# j- importPackage (java.lang);& Q' @! u0 N5 T1 n1 i+ [ P. o; g
- importPackage (java.awt);' e$ U$ Q$ }* J# q) U. Y
, j9 c4 \6 ]# I- include(Resources.id("mtrsteamloco:library/code/face.js"));
$ ^5 C8 h4 d2 P5 V8 K" v- X# K
+ k( c- S8 h9 q8 |* N; y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
) S+ p R. }1 P3 b! o - 8 e! R, U$ ]* x6 e' n, m1 ]
- function getW(str, font) {
8 I" k$ E, t3 J3 l1 }1 u& A1 B - let frc = Resources.getFontRenderContext();
% r! t7 f% q y. _ - bounds = font.getStringBounds(str, frc);
* x9 K: d' R+ s; m% [/ L `& y - return Math.ceil(bounds.getWidth());0 n& B* J# V* \8 E; B
- }( Y" t5 H0 D8 M* o6 O$ Z
* ]/ r. y1 j5 Q% a- da = (g) => {//底图绘制
: P/ Z' o4 r+ F - g.setColor(Color.BLACK);
1 Q3 @4 I2 M3 F# K# i - g.fillRect(0, 0, 400, 400);
; l- P9 A' s& {2 ~ - }; p( f0 b3 d* Q9 v0 p! k
- : {/ A- t% j% o. y
- db = (g) => {//上层绘制
/ z: T3 D! Z9 S6 Y - g.setColor(Color.WHITE);
0 p& g1 U/ y1 g6 C - g.fillRect(0, 0, 400, 400);
. }% e7 B( i2 x. u" G3 v; x - g.setColor(Color.RED);
0 E; f! |$ c' | - g.setFont(font0);
+ r- b) q3 B/ s4 z" f - let str = "晴纱是男娘";
2 [. x# F4 P, ]* ? - let ww = 400;: s% d$ x% n, n" I
- let w = getW(str, font0);2 v' Y* u0 {. M- G& c. q
- g.drawString(str, ww / 2 - w / 2, 200);$ Z7 m/ r& q% j- n ~
- } _- C' ?5 f7 b7 ]3 q" q6 }
+ j( @5 T& d! M2 }" }- const mat = new Matrices();4 f6 I( }$ n* D. d2 \7 B
- mat.translate(0, 0.5, 0);
8 S4 K( x( Y, k# q* e+ _2 T8 } - 7 c H% ]5 X( D
- function create(ctx, state, entity) {
: R# p* \7 [7 K) O# o - let info = {
5 C; x! R- n5 R6 e4 f+ J - ctx: ctx,
( ^: H" e' b+ Q2 e- N6 G - isTrain: false,/ g6 E4 w. o+ G1 w
- matrices: [mat],
/ l7 E" C" G( J5 H, q - texture: [400, 400],. u+ f$ h; N" |! X( X& n
- model: {! h0 X) Z( f4 Z2 @3 g
- renderType: "light",/ i$ k9 d1 i3 Q- @0 V( H+ C8 V
- size: [1, 1],
' ?3 I, w; s/ D' S - uvSize: [1, 1]# Y" w1 y$ A; _' A# A, t( _
- }) w+ G8 v5 B- {4 i0 E
- }* J8 b: w! P2 U2 X/ k5 e
- let f = new Face(info);
6 w3 J3 c3 J: a( g, q( j - state.f = f;
9 i6 C' |; A6 L, |3 i3 ?1 w3 r - 6 f& v5 a. s% f2 ~- U8 b% \
- let t = f.texture;8 n& _" U R! x: n5 C
- let g = t.graphics;
- `2 C6 V! }( f9 x% K9 Y6 M4 u( z! v - state.running = true;
3 E8 i* a8 m+ G6 x7 [: m6 S5 K - let fps = 24;; n4 J S2 f0 G+ s
- da(g);//绘制底图
6 r( y+ o2 [1 N. }/ u6 P - t.upload();
3 f" o8 a0 D: r6 l9 t+ L& y) w - let k = 0;0 y5 Q- i/ K5 S$ E9 H R1 n
- let ti = Date.now();- q0 v$ W5 D1 h, Y$ h' G! p) k8 [
- let rt = 0;
/ _. F, N9 B# J1 F: g' K1 u5 K - smooth = (k, v) => {// 平滑变化& [, e. V0 t/ ~- a
- if (v > k) return k;
. T$ h4 Q9 A g, ?4 @3 i - if (k < 0) return 0;
+ n- S0 j; T* ] - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* n2 I5 ^" A" }8 O x* B& T, v0 b
- }. c+ L$ M. [- u% \* H( h# p; @
- run = () => {// 新线程
: Y2 Y9 O, E; k; ~! W2 A7 o - let id = Thread.currentThread().getId();' M$ u2 z/ D% Y: k/ x
- print("Thread start:" + id);
' l& ]0 q/ W- |1 ] - while (state.running) {
& Y( G m% g, w6 c: @9 T - try {
' y: \# q Y4 q/ d$ ^$ v# q - k += (Date.now() - ti) / 1000 * 0.2;
) S! K5 u, }# b' B, q/ z - ti = Date.now();
9 v* k% W$ g, L& @6 T* ~ - if (k > 1.5) {2 Q; y8 u5 L2 L" ]3 n) o
- k = 0;
- Q9 |) @( |: a - }
+ A: z. C" O8 d8 ]8 |* Z - setComp(g, 1);% `; e+ k! t! ]* f& S
- da(g);4 `7 j' x) A, Y# X r7 Q5 `! M' ?5 Q
- let kk = smooth(1, k);//平滑切换透明度0 c0 n0 a( ~' `$ ?7 D0 L c
- setComp(g, kk);; O& [+ N8 ^* ]; V2 c
- db(g);
$ B Y& ?2 a, a/ \" @ - t.upload();9 B3 f$ e% ?: a7 ?
- ctx.setDebugInfo("rt" ,Date.now() - ti);' @0 Q8 J& ^+ C& N# V
- ctx.setDebugInfo("k", k);, f# @9 e6 ^: n% ?
- ctx.setDebugInfo("sm", kk);
. U: ~ |0 Y+ l) T* b8 V4 O$ F - rt = Date.now() - ti;0 _: X J5 Q# l* E% ?1 ]1 U
- Thread.sleep(ck(rt - 1000 / fps));
) K# |4 R% b2 Q. [/ G- o+ g0 C* \ - ctx.setDebugInfo("error", 0) Q g# s) R; `6 R- K- m
- } catch (e) {
" Z/ g% H! S0 y; L) @ - ctx.setDebugInfo("error", e);
& b$ V3 H! T6 G) Y, d: z - }
e2 D9 {0 z% S \. I- U/ v - }
6 X& C( e' r; w5 k - print("Thread end:" + id);
7 N ~" O; a9 |% c: C- W - }0 Y. f6 J1 i8 B1 N! E; g7 K& {
- let th = new Thread(run, "qiehuan");, w5 d' W# D* H5 T$ N. ]$ r3 f
- th.start();, Q" g4 U- o o0 L: V7 g4 v$ j
- }% p% y$ g4 d, z# t) e% [
( S) G8 f, A) l- function render(ctx, state, entity) {
5 ?5 U9 M/ [( I5 W+ |# c - state.f.tick();7 W4 p, I/ k1 {
- }
$ \2 [. Y; B: x0 w8 V/ w - 3 z. R+ H7 d9 @% B
- function dispose(ctx, state, entity) {' M( P) y( D1 j
- print("Dispose");( b! P( d, v; \" n% Y3 c1 F, A& p
- state.running = false;
7 t- J( I0 ]$ H: V/ ]% N: j - state.f.close(); ?! h& @( x& o2 S' C
- }
$ q% Z5 s' ]; M4 P
5 ?; z& }8 Q' a1 `4 }- function setComp(g, value) {
" z) [5 X* y1 H8 | - g.setComposite(AlphaComposite.SrcOver.derive(value));# p7 r1 I5 U. m* I- x- z* }, Y& X
- }
复制代码
0 S% @- {0 T! c9 C% \5 Z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。
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5 T& f, W- A% ^2 C! M# s+ n& j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 G2 ?4 ?5 n: Q& ~5 Y
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