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: K' t8 t: P) M# l5 Q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。2 i+ d% r5 ]# Y& @/ U& H
- importPackage (java.lang);6 ^9 C* Q( @9 I8 X. O, |
- importPackage (java.awt);+ X( H' M* h1 z0 p. U( L( a
t9 ~5 X7 Y# w) `8 N( ]/ g- include(Resources.id("mtrsteamloco:library/code/face.js"));
; p( r9 A9 `: p$ `* h7 s - : Y& {& o- L- e( ~& e
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);: l: n& A) R* v H* X
" g3 q* K0 V% O) Y3 `8 B- function getW(str, font) {
$ J5 Q- W4 `9 s - let frc = Resources.getFontRenderContext();
/ v( d" o; i m/ P6 k - bounds = font.getStringBounds(str, frc);! M! i5 v: O/ U9 G; o% ]
- return Math.ceil(bounds.getWidth());3 ]5 s$ c" F8 V3 r& I5 {# C2 z" d
- }
% D( \4 G" v' \6 \0 d$ a* Z3 d - ! q# M* Z9 R, w& a6 y5 M
- da = (g) => {//底图绘制
1 d8 E$ W1 E1 x- X; F; c - g.setColor(Color.BLACK);+ B A8 u- [9 x: C _7 Y; ^
- g.fillRect(0, 0, 400, 400);/ r; Y7 M/ {, P7 {; s
- }9 B1 t9 a1 a1 s7 m8 h1 Y
- 3 N' B% Y; r, g1 J: \
- db = (g) => {//上层绘制6 i+ i. j# D ~6 q' d/ q! B* v
- g.setColor(Color.WHITE);
; w, [1 {( P. L" C+ K7 t7 y - g.fillRect(0, 0, 400, 400);% O5 l) g( b5 ~6 r
- g.setColor(Color.RED);) E# g, a1 W: o
- g.setFont(font0);
) s/ P, ~: e1 i; ] - let str = "晴纱是男娘";
% y: `- I9 A/ c: _( Q) e - let ww = 400;
# D6 Y( E: {3 h1 S9 k# K4 [/ f - let w = getW(str, font0);
' V9 e m0 e* J, U# b) R/ L3 t - g.drawString(str, ww / 2 - w / 2, 200);. ^/ i) q. B; f" v2 |8 |
- }: |4 n2 `4 D$ L0 |5 h0 h( M$ \
" W! U) Q" P% F: f- const mat = new Matrices();
$ z# v) @& K9 d2 v2 Q4 p - mat.translate(0, 0.5, 0);. R8 L$ U) a1 I1 i) F
- 7 m) Z: i1 E3 x2 V, ?$ b/ v
- function create(ctx, state, entity) {0 j+ k/ O; W: o7 j7 i) A5 g
- let info = {8 G z- K( N; S p0 @% j$ g
- ctx: ctx,
& T# w7 Q+ ~9 z6 q, A/ f# A; Q+ v - isTrain: false,+ }" k+ Y5 d7 T% y9 R, O8 m+ a- n
- matrices: [mat],
. z1 @ s) |' J i - texture: [400, 400],$ n. S7 C- u8 e- v% j* O& y
- model: {
' D$ n9 K- |. H. M% ~2 O - renderType: "light",
4 V& l7 l) W+ h3 B - size: [1, 1],9 i8 n$ ^5 ~) \" C$ D% B" o
- uvSize: [1, 1]& V+ c, N o( g Q
- }6 l7 w* W- B4 W- i$ U
- }+ g$ \3 t7 m: z: O; y
- let f = new Face(info);
" P/ J3 S k4 B5 x E. g - state.f = f;; t' e' N+ o4 m- c, [* G9 r8 D5 W
- ! U" A d8 I6 q7 g( |# F! }1 i
- let t = f.texture;( V' x) u! k8 ~1 t" T8 h5 h& c
- let g = t.graphics;
: j0 q8 c+ F- Z+ C - state.running = true;
+ F: d$ ]' w) b' L& r L - let fps = 24;
1 o0 R- o" U8 q6 X0 g$ U - da(g);//绘制底图
- U2 p1 l' u' p( ]- K" { - t.upload();
+ g9 ~" _1 x3 B - let k = 0;
" F/ H; t) h$ b* v' Q5 k - let ti = Date.now();
/ U* l8 d: H% j# [6 @ - let rt = 0;/ N& z5 `# }7 W& ^ y" G, K
- smooth = (k, v) => {// 平滑变化
3 u! d0 K- s0 @/ U; G/ _ - if (v > k) return k;
" Z- P# o; E, F2 X; x3 l Z - if (k < 0) return 0;
, U% h! X7 u0 M8 n - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 G7 l T" `4 \! O) F4 p' w - }
+ ]6 }: E3 G- c0 S' F' D9 C; R - run = () => {// 新线程; l# Z, z/ j# I, ^
- let id = Thread.currentThread().getId();+ j# L( P* q/ i; |$ {! @+ Q
- print("Thread start:" + id);
8 |5 O" N: p% I; W) a6 Y" J0 j - while (state.running) {
/ t1 h6 k5 c' j- e4 L - try {
. q p6 t% Z% C - k += (Date.now() - ti) / 1000 * 0.2;$ X( C% X, |! _, ^* S# X
- ti = Date.now();& `6 R" p. g6 u% k) u* {8 h: x
- if (k > 1.5) {* b4 B' c) I5 n9 V: B- n! W
- k = 0;( H4 D3 T% }# ^, A' q
- }
) @+ z9 s# O; ~: ?& m& o - setComp(g, 1);
; x+ I: X6 Z( C7 q% S5 |- ~4 \' s - da(g);" _9 i, a$ ?, q7 d7 \( c2 [
- let kk = smooth(1, k);//平滑切换透明度/ o1 m( r0 k4 U" c
- setComp(g, kk);
8 b* f' R$ g. v( X4 M - db(g);
5 [. c' Y$ O: @7 v7 {# |- U - t.upload();! C& U* |, h' @
- ctx.setDebugInfo("rt" ,Date.now() - ti);
) K0 D Q; g) y: Y) U9 L - ctx.setDebugInfo("k", k);1 V8 S3 n1 q. I9 t; r" U9 _9 S6 V
- ctx.setDebugInfo("sm", kk);) \- p) @* v& l" l8 Z) y% S6 z5 \2 j
- rt = Date.now() - ti;% ]3 Q) B$ k x, f. a$ \* B
- Thread.sleep(ck(rt - 1000 / fps));& j/ C7 |% f- @2 H3 o7 L
- ctx.setDebugInfo("error", 0)+ h" I: O9 i2 j E: v+ B( z0 A5 `
- } catch (e) {8 d" q7 y) m8 D0 a$ N
- ctx.setDebugInfo("error", e);
! [% O; Z! c" q+ b: m# W! E& h0 q - }+ q+ C i: i4 D' u& ]
- }
0 W/ s- d. G# [: S5 R' K% R& [ - print("Thread end:" + id);8 k9 i: ~) t: p4 n c& G- D. d
- }0 m. s P1 a1 r" s! C! ]' O: a
- let th = new Thread(run, "qiehuan");
# r3 g3 Y. g1 |3 [. z) Y - th.start();
; V; [3 g8 P8 j2 x4 ~) l/ ?' u - }
8 b9 l" E! @! _- T* \ - 6 i- W8 T5 D* ?/ e9 U; c
- function render(ctx, state, entity) { w7 l* o9 e; S# L
- state.f.tick();
, ~/ C8 w5 k% d3 q - }
& P( Z) f3 M* u& s+ K7 c
/ U& L" H! J7 M1 i! W- function dispose(ctx, state, entity) {' Z8 G, d/ m& c0 D$ q3 r; r9 @
- print("Dispose");& r/ F1 ~+ H h( e& k3 e! e x
- state.running = false;! D7 B5 H2 o0 `3 Z
- state.f.close();
0 d' v2 s0 p( z5 b# v - }+ a5 q1 R) ?7 V6 L
- - y% o1 n. q+ t+ x. L2 R
- function setComp(g, value) {8 L- a, \0 z/ j1 |
- g.setComposite(AlphaComposite.SrcOver.derive(value));/ w3 w4 P( d; r2 }5 J% l
- }
复制代码
4 @% U# Z( q1 a* V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。6 t9 |5 X! s0 I8 D& l6 r
2 N: ^, Z2 u, C7 B& g3 i* m. Z( S
. v. `+ k! S& ~( |- g2 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)& a" E& o: H: @+ C
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