[657] | 1 |
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| 2 | #ifndef _LWENVELOPE_H_
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| 3 | #define _LWENVELOPE_H_
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| 4 |
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| 5 | #include "lwo.h"
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| 6 |
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| 7 | #include <iostream>
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| 8 |
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| 9 | class lwKey
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| 10 | {
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| 11 | public:
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| 12 | lwKey(float ntime, float nvalue) : time(ntime), value(nvalue) {}
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| 13 | float time;
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| 14 | float value;
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| 15 | unsigned int shape; /* ID_TCB, ID_BEZ2, etc. */
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| 16 | float tension;
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| 17 | float continuity;
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| 18 | float bias;
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| 19 | float param[ 4 ];
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| 20 | };
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| 21 |
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| 22 | typedef vector<lwKey*> vkeys;
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| 23 |
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| 24 | inline bool operator < (const lwKey &k1, const lwKey &k2)
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| 25 | {
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| 26 | return k1.time < k2.time;
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| 27 | }
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| 28 |
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| 29 | #define BEH_RESET 0
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| 30 | #define BEH_CONSTANT 1
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| 31 | #define BEH_REPEAT 2
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| 32 | #define BEH_OSCILLATE 3
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| 33 | #define BEH_OFFSET 4
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| 34 | #define BEH_LINEAR 5
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| 35 |
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| 36 | class lwEnvelope
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| 37 | {
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| 38 | float range( float v, float lo, float hi, int *i );
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| 39 | void hermite( float t, float *h1, float *h2, float *h3, float *h4 );
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| 40 | float bezier( float x0, float x1, float x2, float x3, float t );
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| 41 | float bez2_time( float x0, float x1, float x2, float x3, float time, float *t0, float *t1 );
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| 42 | float bez2( lwKey *key0, lwKey *key1, float time );
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| 43 | float outgoing( unsigned int key0, unsigned int key1 );
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| 44 | float incoming( unsigned int key0, unsigned int key1 );
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| 45 |
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| 46 | public:
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| 47 | lwEnvelope()
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| 48 | {
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| 49 | name = 0;
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| 50 | }
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| 51 |
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| 52 | ~lwEnvelope()
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| 53 | {
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| 54 | if (name) free(name);
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| 55 | unsigned int i;
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| 56 | for (i=0; i<keys.size(); delete keys[i++]);
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| 57 | for (i=0; i<cfilters.size(); delete cfilters[i++]);
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| 58 | }
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| 59 |
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| 60 | float evaluate( float time );
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| 61 | lwKey *addKey( float time, float value );
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| 62 |
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| 63 | int index;
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| 64 | int type;
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| 65 | char *name;
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| 66 | vkeys keys; /* linked list of keys */
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| 67 | int behavior[ 2 ]; /* pre and post (extrapolation) */
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| 68 | vplugins cfilters; /* linked list of channel filters */
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| 69 | int ncfilters;
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| 70 | };
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| 71 |
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| 72 | typedef vector<lwEnvelope*> venvelopes;
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| 73 |
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| 74 | #endif // _LWENVELOPE_H_
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| 75 |
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