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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。: U5 H8 F; v `& h7 r6 y5 x
- importPackage (java.lang);
) u( D, S/ C- D& x- R$ w - importPackage (java.awt);# R# y7 H e- W& b, R$ P% ]
2 L7 L$ V' i( E- t- include(Resources.id("mtrsteamloco:library/code/face.js"));
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' s& ~. C; g% o0 ?& }# g0 U0 _# c: M- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! T }) {- t; d( m8 b* U8 k/ f
9 z* M. r- C( A9 o* O% S5 J w- function getW(str, font) {5 }2 @) J7 C1 n' b
- let frc = Resources.getFontRenderContext();
0 \) U2 {. @ M9 y$ `# z7 t - bounds = font.getStringBounds(str, frc);
0 i0 W- O5 E) d) w7 |- w/ |6 ^ - return Math.ceil(bounds.getWidth());
) ^7 _, O# C/ K# H1 s - }
: `# |1 o$ j e# p - " K: H+ [4 L7 f
- da = (g) => {//底图绘制
0 U5 |5 d& E$ e - g.setColor(Color.BLACK);
* B. i1 ]- C9 u" m5 y: S6 i% O. n$ U2 g - g.fillRect(0, 0, 400, 400);7 y1 y$ p2 r+ n& i4 Q
- }
5 ?4 h7 W k3 ^$ k
: e! g0 T5 W( ]1 M2 Q3 H) ]" o1 R! c- db = (g) => {//上层绘制* ?* N* j, d6 g: Q3 t
- g.setColor(Color.WHITE);
5 ^: Z- s& F9 L* |( O8 C4 s* P, B - g.fillRect(0, 0, 400, 400);
j) b0 u( x2 Y - g.setColor(Color.RED); r2 ]" F1 b3 h" }5 a2 L' `" p- g
- g.setFont(font0);
& J d9 J8 ?/ M - let str = "晴纱是男娘";
# e+ r* V0 l4 y - let ww = 400;1 _$ g9 t5 G. [, T) L% H
- let w = getW(str, font0);
8 \. S8 s! y- @8 X3 g. K* o/ ? - g.drawString(str, ww / 2 - w / 2, 200);
) V) |8 g* Q j/ j$ r Z - }
6 p% L5 W7 e+ x5 o! E - ( z0 L- H9 F% d$ t- {
- const mat = new Matrices();3 A* F7 X+ p4 S; m- Z
- mat.translate(0, 0.5, 0);, P' O% A6 z- J4 n) L. r! @
1 ~% X# j, n1 Z* ~- function create(ctx, state, entity) {
! J! q8 u5 t5 g" H& q - let info = {
3 l3 p9 ]2 Y; J+ l% A/ ] - ctx: ctx,9 R) T3 K) k+ N$ M9 o
- isTrain: false,- @6 ^( z! |7 U- X8 M* g
- matrices: [mat],: I0 b' ~# F' P- W
- texture: [400, 400],- J1 e7 R# h) S3 C# D# ^
- model: {
' B' P+ G8 H* e0 ^1 I" f5 F - renderType: "light",
2 }: V, U4 K4 A6 H. d) h) ~ - size: [1, 1],7 D6 B3 O0 M Q* E+ ]
- uvSize: [1, 1]& m' d! p9 T3 A' Z6 B
- }
" C; s& N5 E2 y' Q1 b6 `# { - }
) u' j7 M% N. H1 G. u$ S - let f = new Face(info);
' T# F% \( E+ O) v0 `2 Y: W2 ~ - state.f = f;% _. S" t {; ^
4 b1 U* ` ~ b5 E! _7 X- let t = f.texture;
/ ?( G1 o2 l+ M) w _4 u+ X y& f - let g = t.graphics;$ K; L1 K* w/ D% ~3 p" i5 d; {1 W
- state.running = true;/ w3 i4 E5 V4 j- i
- let fps = 24;
( \/ Q' I- f% G3 p; P. ^ - da(g);//绘制底图- [6 V+ Z3 Q( j6 q! ^. o6 P
- t.upload();
" X* c8 U4 F" D7 n) k" Q' w1 z - let k = 0;) M1 G6 b( K+ \- d! p) h% I
- let ti = Date.now();, ^/ @8 f( _* t/ Y
- let rt = 0;
' ^$ N. D+ D( S1 N) D! p - smooth = (k, v) => {// 平滑变化
5 T# N+ h2 ^3 @; J1 N: w - if (v > k) return k;
- l$ T8 i+ g w/ |1 @2 j4 E2 w. q - if (k < 0) return 0;) q0 q3 ?" V2 u* l7 C+ l' R5 k
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
# ]/ l$ d# R$ C7 |$ [3 s - }
, L1 ?, Y7 l" } - run = () => {// 新线程) z8 h8 {! T; W n
- let id = Thread.currentThread().getId();' V9 [ B- C. X3 K# M
- print("Thread start:" + id);
0 m, c/ J! F) t$ A - while (state.running) { B) E K6 `" H
- try {
/ m: C. K4 f( H$ Y% u - k += (Date.now() - ti) / 1000 * 0.2;% x, u% M) B/ \1 u
- ti = Date.now();
' V: F6 o/ E4 H" D - if (k > 1.5) {7 G' v( \6 o0 @- f/ c3 a
- k = 0;2 T2 `8 c1 P: J5 T
- }
' |) a! v5 R4 D - setComp(g, 1);9 B7 b. n' O7 d+ j* [( Y
- da(g);
& H, c5 B5 c0 K9 l. G* ` - let kk = smooth(1, k);//平滑切换透明度
/ E+ a( D- W: e4 e - setComp(g, kk);$ b/ T7 z4 a% G9 B5 y# i; w
- db(g);
8 [$ V& _5 @, d - t.upload();
! y g, Q& q, U# B - ctx.setDebugInfo("rt" ,Date.now() - ti);
8 h4 b0 }, n9 Q% z3 u8 D% N - ctx.setDebugInfo("k", k);
3 P( I2 k+ s* C3 [: ` - ctx.setDebugInfo("sm", kk);
7 j: K# V( k- L - rt = Date.now() - ti;/ T, `9 Q8 E( p! m8 E. {
- Thread.sleep(ck(rt - 1000 / fps));
, Y6 F1 k; f3 {, B - ctx.setDebugInfo("error", 0)
- N, ]; j9 q! y - } catch (e) {
4 r( S! [( e: G6 q2 P( \ - ctx.setDebugInfo("error", e);
3 {$ G9 q# v V. U - }0 ]1 l4 D% I) O6 b3 M8 X* Q) ?
- }
, n' q' A, c: w - print("Thread end:" + id);" I7 {* t/ i. v1 c% n) _, }
- }4 z9 F4 L5 T H! X6 s/ b9 E
- let th = new Thread(run, "qiehuan");
4 x1 V" _" C9 m( I( w - th.start();
* l) n5 Z2 D+ E5 d - }% h8 R7 u/ g/ _7 G; M3 {- }7 w7 Y
' o0 \0 ~7 s7 A% |% v3 G- function render(ctx, state, entity) {
/ P: s, F2 k6 `7 a - state.f.tick();. W2 g4 e* J$ b M, q' \
- }
, E2 u7 O7 b6 u" D' \# Z& n, } - % ]# T9 n! C# p) h& Z
- function dispose(ctx, state, entity) {
5 |7 N1 d- c- a* T$ l - print("Dispose");. q6 }6 x2 j+ e: @2 l' i" D) x
- state.running = false;$ \, I, _8 q7 I W! V! ~
- state.f.close();+ x2 E( q5 @5 V3 A! Z8 ]8 M$ @
- }
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% ?+ u4 _3 o4 ?- function setComp(g, value) {
& y/ P4 m- K1 O' S4 R - g.setComposite(AlphaComposite.SrcOver.derive(value));; g# G+ Y1 x& o7 {$ P
- }
复制代码
4 V0 x' G, t1 y/ t. O: p! ^7 J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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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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