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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。1 q7 k: U* Y1 f" c" j
- importPackage (java.lang);9 I# \1 _2 x7 }5 `* V3 O5 S
- importPackage (java.awt);
2 R" [: |2 @- H! V3 j2 F0 Y6 M( D0 s - " R3 j& E% c% ^3 z9 [
- include(Resources.id("mtrsteamloco:library/code/face.js"));
- c' S7 U' k/ ~! K9 T6 ?9 l1 A - p# c! G& K+ l8 l$ l- t
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" R$ r; o4 @6 q! w2 x. Q" n
0 {6 s: i% N& H- n# b7 A# o* ^) ^- function getW(str, font) {
- X4 ?. |2 v. y9 { - let frc = Resources.getFontRenderContext();9 N1 e, j4 t: }; \' ]
- bounds = font.getStringBounds(str, frc);
! @3 e8 d% N& U4 {! w - return Math.ceil(bounds.getWidth());8 Y! c# e4 H6 G
- }3 w1 \, Z3 {' _/ f" X7 M
S, y% c* [) Y+ N6 M' |! Y+ h- da = (g) => {//底图绘制/ |. H0 p9 _4 }% M* }
- g.setColor(Color.BLACK);
/ a' w6 H$ C3 j4 X+ }% R4 G: `' ^ - g.fillRect(0, 0, 400, 400);
( J1 o- I5 r& { - }& ?! m! w4 N3 S* [. I2 Z( T& |
- ) y3 v( d5 Y( Y3 v8 O
- db = (g) => {//上层绘制
6 o3 h3 l/ p) p0 V& C$ B# A - g.setColor(Color.WHITE);
: A7 z8 ], o- q7 z1 @ - g.fillRect(0, 0, 400, 400);
" d- y0 b9 a0 ?4 i, @ - g.setColor(Color.RED);
9 `) M, ]' Q2 N7 K9 j/ k7 k - g.setFont(font0);
. y% Z, ?, ^, N s9 |+ f - let str = "晴纱是男娘";
* W1 I$ V+ T& g0 e - let ww = 400;. T: F% t6 q$ V& @# h
- let w = getW(str, font0);
3 ]# ` Q+ b V# ]1 h( z - g.drawString(str, ww / 2 - w / 2, 200);2 A* v$ V- R, H6 r I
- }
) a. K+ G( U9 E( E; G( F; ?
. g1 w) ^. P9 K$ ?. K: r4 @- const mat = new Matrices();/ Z+ o$ W0 c/ B8 o0 C7 O4 C
- mat.translate(0, 0.5, 0);
2 b# {0 V' c3 c3 _1 P0 b' b
6 B1 ~" c& |/ r- O* N7 W! P; M- function create(ctx, state, entity) {5 U ], N# F) O
- let info = {7 T. r, E/ ^) T% l% H# l( U
- ctx: ctx,% P! ?" x9 Z4 w9 p
- isTrain: false,
. U- M3 F2 h- [7 T5 @6 I6 h - matrices: [mat],
- c9 } Q! Z, g3 X1 m6 |/ F! m4 @ - texture: [400, 400],
1 ~4 K+ n( r5 I' u+ ]9 O* x4 ^ - model: {% T# s# t8 Q( K8 j
- renderType: "light",
. E' w. o' [5 U7 x; T - size: [1, 1],5 S" S, e- T B; F' \" t& N7 R: i
- uvSize: [1, 1]7 a& ^, \5 B0 F6 Z5 K# a1 a2 n
- }
/ X; d1 v( @& }4 q - }, q7 |1 D1 R! X# T" K& L9 {- T
- let f = new Face(info);
3 P- @- m8 r& t - state.f = f;
. r" Z$ S8 x" A* ` - - L( ~& K0 {, `4 j8 G. e
- let t = f.texture;
5 L5 N2 M/ Y. i7 _# V& { V - let g = t.graphics;
, n) D3 \5 ]; q/ k - state.running = true;
+ p2 m- }9 c1 N" x2 n- g+ |& B - let fps = 24;
' \3 ^& {1 i* c: V) U1 ?$ M - da(g);//绘制底图0 A$ D) X/ L# i7 c; w3 A7 J
- t.upload();
6 a/ G* }; W, ]6 U$ A" T - let k = 0;: [, `; Q9 ~2 M
- let ti = Date.now();: e" ]9 u0 W. T7 M+ X
- let rt = 0;; W9 b! P) D* N) c# w3 [* d
- smooth = (k, v) => {// 平滑变化/ U: e! t8 c* ]6 {8 ^( h. L
- if (v > k) return k;$ N" v+ g, i3 ~ ~
- if (k < 0) return 0;
4 n O3 K$ l! y9 ], i/ L - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;5 [, t* G) v8 x a
- }1 q% h, P% y/ ]0 I/ |7 ?; V
- run = () => {// 新线程. d! t' G) r6 j: z
- let id = Thread.currentThread().getId();0 J+ U6 i% N% h7 _1 b
- print("Thread start:" + id);/ J |% i" K5 y0 G% }
- while (state.running) {) c1 n& {( Z2 [$ q% A$ x
- try {
( r$ I; Y2 ^6 g6 A/ d. q - k += (Date.now() - ti) / 1000 * 0.2;% S9 m! Z% f3 V3 J- a9 h1 B
- ti = Date.now(); P) R/ Z& G$ r( }3 a4 O
- if (k > 1.5) {5 Z$ I& H0 o# |
- k = 0;2 {7 G9 \* g0 m* ~6 _( g0 I0 B
- }9 i2 L' r! x; @; w5 C
- setComp(g, 1);
( R7 U, F- I0 f/ O& {' g - da(g);1 o& U) G# K, F7 F: D% X* ]) w( d" l
- let kk = smooth(1, k);//平滑切换透明度) w; y4 Z( x) x6 b, R
- setComp(g, kk);/ g4 e: c( O2 E; |- }9 c6 o
- db(g);1 n) u8 @: R5 d5 y8 [$ K9 s& J
- t.upload();% F" V8 A+ m! Z) P
- ctx.setDebugInfo("rt" ,Date.now() - ti);5 {: \! [( d+ i: E4 c$ n' p* P
- ctx.setDebugInfo("k", k);
: N* W" O8 f( x# L8 x4 }3 M6 \' I - ctx.setDebugInfo("sm", kk);
$ A. E7 N. t' g9 G$ C/ ^/ L - rt = Date.now() - ti;" {6 A8 V& [% H# Y/ Z' Q
- Thread.sleep(ck(rt - 1000 / fps));+ E1 A5 p5 z& R# r. P. z
- ctx.setDebugInfo("error", 0)9 h/ \4 w- K; C# j, _7 c1 L/ l
- } catch (e) {
; f( Q# G4 e7 Z4 Z1 J0 o9 j - ctx.setDebugInfo("error", e);" t" P1 I5 s+ u L
- }
" a% k1 m0 ~- T* | - }3 Q, l+ Z* {3 w8 q
- print("Thread end:" + id);
$ O% y! f' N) E3 ? { - }
2 {! A; {/ j: \, D/ Q6 h- A: J - let th = new Thread(run, "qiehuan");
2 [, Z$ j, r7 @' W - th.start();
+ E% P8 g6 e1 w$ ?" t - }
. N" K( N" j$ m7 }2 F# X+ a& [ - # [, F# R4 p7 a8 r& G4 G/ p
- function render(ctx, state, entity) {
* c8 R i6 z! L) t$ q, g - state.f.tick();
. z; i0 h& J, B: Z1 B1 b - }. r+ f# \- V7 A# {2 K2 S! e* w
l. o' y1 @- n' _# A' P( M- function dispose(ctx, state, entity) {
9 D) F. z2 d- y# I2 j - print("Dispose");
m: u2 u& v o4 o& q9 c- {, } - state.running = false;
( \- z* ]1 O( k0 e }8 Q - state.f.close();
1 I+ |9 J2 P" F* I4 o% Y5 U# E$ f6 O3 _ - }, @4 H. y1 n9 z4 O
- 8 x2 s1 n7 p4 X6 h- {6 g. p
- function setComp(g, value) {
9 H8 ^, b1 g: k8 w1 Y( p( d6 L6 u! Q - g.setComposite(AlphaComposite.SrcOver.derive(value));
" h( L) |5 Z* v - }
复制代码 + k7 C2 P' P( f1 h( [0 u
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。- Q2 ` C6 Y& ?6 z2 `# {
9 ]/ G' t6 `- j
$ J6 [' T0 }2 Q/ Q8 l顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)3 `! s$ o; J5 Q) j W" w1 i) x9 z! r
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