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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。
. j, e0 j+ s ?- importPackage (java.lang);
9 m6 o1 W- R: H' |" K - importPackage (java.awt);1 |) ]7 _% k- f+ O8 |5 p- L
- ; B& r1 _5 ?* }' F
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- y1 x2 s6 f; k# R# {5 Y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( a' r9 R9 |! {% P; ]2 z* \
- 6 v+ I& H$ ?; W$ w- z x$ L
- function getW(str, font) {. K) I' F, f4 \% }- D9 V4 V- L
- let frc = Resources.getFontRenderContext();/ A' E9 S5 t6 C9 d
- bounds = font.getStringBounds(str, frc);/ Z: t3 a# P' }1 c+ y
- return Math.ceil(bounds.getWidth());, I0 ] ~) e- y1 R H+ e" q
- }+ ~0 b' V/ d1 k& a$ S
- 0 f" x( i. M; ]7 g
- da = (g) => {//底图绘制- l3 T R, u& r/ b- f, j$ m4 r
- g.setColor(Color.BLACK);; e+ G5 X) c7 P& ~
- g.fillRect(0, 0, 400, 400);
7 X- M' }3 r/ A! X- y/ @+ ^( O - }
r) o; |* q% ^1 C
" R3 H7 }4 D$ G* P' L- db = (g) => {//上层绘制
+ s/ x: T5 \! Y0 z: K - g.setColor(Color.WHITE);
V* _! Z! G' \# |, H% u0 e - g.fillRect(0, 0, 400, 400);
7 y3 a. d3 p; J* T - g.setColor(Color.RED);- u% M1 ~' W u, A! f
- g.setFont(font0);; v+ ~; r0 r7 S6 d8 M
- let str = "晴纱是男娘";
* u! d- I1 H G: V - let ww = 400;! T& R) ~" R2 g: m1 g6 \2 D3 n
- let w = getW(str, font0);+ d2 ~; X3 K+ E% { g' _6 P; G! t
- g.drawString(str, ww / 2 - w / 2, 200);! Y! ~! a2 D' F1 g+ `$ d
- }
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" b0 |& l' t; W/ L- const mat = new Matrices();$ v' {, v" T j* y
- mat.translate(0, 0.5, 0);, u: v0 [1 o) ~* s
- . ]/ `/ {* y9 P) z1 n. J
- function create(ctx, state, entity) {
1 `3 H! t, {+ z0 w; P - let info = {
3 a$ i. O. D: z5 ` - ctx: ctx,! b F3 z+ x: R! N
- isTrain: false,! T/ ^4 W2 x9 F2 o* O4 B
- matrices: [mat],- z* z6 _+ ?; c4 |& D
- texture: [400, 400],( b1 ^: |( G1 L, e3 G
- model: {2 [/ f0 h- J4 Q7 B& B/ \6 D7 j
- renderType: "light",; s9 A( h* O' v4 E
- size: [1, 1],+ p4 l# e1 a: b* }5 E4 c! V9 K
- uvSize: [1, 1]2 I1 H4 s8 Y" f! z6 j
- }
2 z7 N' A+ ^- L+ L - }
7 W* Y5 \6 N6 D+ r - let f = new Face(info);( t0 u6 g& V3 H q6 m7 ~
- state.f = f;
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- let t = f.texture;4 \( n* @1 A, C, }) b! Y/ G( u
- let g = t.graphics;6 i6 d3 W1 Q+ k- H7 O- j* R
- state.running = true;" Q" j7 Q' k& q% g! F8 u6 j& U
- let fps = 24;' V4 r7 B" ^( x! y& g
- da(g);//绘制底图
, F5 b( v/ W1 a; Q+ T - t.upload();
8 y& H0 U: @1 U7 n T1 O( t( ? - let k = 0;
( A+ ]+ @# I2 w8 c$ u/ e* S - let ti = Date.now();
4 a3 m% h- b. Z/ T - let rt = 0;8 }! w2 G% O& W( j
- smooth = (k, v) => {// 平滑变化0 l3 @7 ?* s) h5 V; Q8 u
- if (v > k) return k;
( j3 ?! J% {' _0 v: L - if (k < 0) return 0;. {( k5 O# Z9 H* \
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* n8 L) [5 s. e$ E3 | - }0 s& F+ w) R5 z7 a( X. K7 a' K7 n
- run = () => {// 新线程' o* G6 f) p/ E6 `4 ?5 w
- let id = Thread.currentThread().getId();
# {" ^. t; Q+ e0 \, S6 b& m - print("Thread start:" + id);
: n" ~2 t8 z! B8 K& A I. X) C - while (state.running) {1 I3 ~- i9 P0 v o6 Q& q
- try {* A i# p& e5 y
- k += (Date.now() - ti) / 1000 * 0.2;; P) j: X% b: x6 O' W
- ti = Date.now();
/ x' Z6 r. g7 d& l - if (k > 1.5) {
! M" ^+ l0 J9 i - k = 0;* ^$ i3 k( t1 B1 Y5 h3 i
- }4 M+ G3 ?, s9 ~0 C) t9 Z/ ]
- setComp(g, 1);
' ^ p6 v2 M# P' D: S" v - da(g);
8 G; M# K7 d% r( u( T r - let kk = smooth(1, k);//平滑切换透明度+ h0 w$ T3 l: D* R! ]& c, p0 ^
- setComp(g, kk);
2 R6 I1 o9 a% W - db(g);
6 E* O4 ]) h! B. K5 C( b( V - t.upload();
+ E- n# W# X- v) E( W - ctx.setDebugInfo("rt" ,Date.now() - ti);
( W" J8 k1 V1 I7 R' G6 C7 V - ctx.setDebugInfo("k", k);/ }. r* t: [$ ^ x8 n# w9 Q
- ctx.setDebugInfo("sm", kk); I) K6 Y) M8 o& }
- rt = Date.now() - ti;- q/ S1 B# \) c" B
- Thread.sleep(ck(rt - 1000 / fps));' x) M( Y4 O. \
- ctx.setDebugInfo("error", 0)1 t0 a7 x, N3 E3 U; `, K
- } catch (e) {
. N/ c& T$ [) K$ E2 P) q - ctx.setDebugInfo("error", e);
7 t9 x) M$ p% r# ?( ~ - }
! y3 r; A$ t8 F - }* \( I& g/ Z7 E! ?1 v' ^
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan"); l( w* b- q. f( t1 J: W
- th.start();
# i9 E) v3 U! Z/ g - }
; n. V, q0 R) D9 D, a. i' \
8 W2 V Q8 [1 x1 W& j: x/ z- function render(ctx, state, entity) {+ \$ v2 C- O% B, w
- state.f.tick();
* _$ o/ |$ [3 E; ~% w& D& h5 @ o - }; q- \' p) s" ]2 e* h3 f
$ J( p" x) h' K& @& W- e- function dispose(ctx, state, entity) {
1 e& e. \2 h8 n" R0 ?/ \! o - print("Dispose");
5 {2 R: [* B- P; Y* D - state.running = false;
, d9 r: |1 O0 t& b, J" E - state.f.close();
1 F6 J1 u3 O) q. G# Z9 l" z0 a* |" S - }8 m7 k( _2 H, ~4 w1 Z: o' r
/ `- m' M: A! C- function setComp(g, value) {# ?7 n9 j( R: c& H l
- g.setComposite(AlphaComposite.SrcOver.derive(value));8 t5 N! R" z! V: M, V- F
- }
复制代码
. V4 |( w% p: o3 J( \% B3 l" u8 |; ]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。3 F6 s3 j- C! p; P/ O
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- b( e; X1 b5 K+ ?% Y4 W9 S; _顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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