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[orx-fcurve] Replace |repeat-block| with (repeat-block)

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This commit is contained in:
Edwin Jakobs
2024-03-30 16:42:36 +01:00
parent feb8d8641e
commit 28aed391f2
3 changed files with 16 additions and 15 deletions
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12
orx-fcurve/README.md
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@@ -178,24 +178,24 @@ For example: `M0 L{3 * 4},4` evaluates to `M0 L12,4`.
## Repetitions
EFCurves add support for repetitions. Repetitions are expanded by replacing
occurrences of `|<text-to-repeat>|[<number-of-repetitions>]` with `number-of-repetitions` copies
occurrences of `(<text-to-repeat>)[<number-of-repetitions>]` with `number-of-repetitions` copies
of `text-to-repeat`.
For example:
* `M0 |h1 m1|[3]` expands to `M0 h1 m1 h1 m1 h1 m1`
* `M0 |h1 m1|[0]` expands to `M0`
* `M0 (h1 m1)[3]` expands to `M0 h1 m1 h1 m1 h1 m1`
* `M0 (h1 m1)[0]` expands to `M0`
### Nested repetitions
Repetitions can be nested.
For example `|M0 |h1 m1|[3]|[2]` expands to `M0 h1 m1 h1 m1 h1 m1 M0 h1 m1 h1 m1 h1 m1`.
For example `(M0 (h1 m1)[3])[2]` expands to `M0 h1 m1 h1 m1 h1 m1 M0 h1 m1 h1 m1 h1 m1`.
### Interaction between repetitions and expressions
`M0 |H{it + 1} m1][3]` expands to `M0 H1 m1 H2 m1 H3 m1`
`M0 (H{it + 1} m1)[3]` expands to `M0 H1 m1 H2 m1 H3 m1`
`M0 |H{index + 1} m{it}]{1.2, 1.3, 1.4}` expands to `M0 H1 m1.2 H2 m1.3 H3 m1.4`
`M0 (H{index + 1} m{it}){1.2, 1.3, 1.4}` expands to `M0 H1 m1.2 H2 m1.3 H3 m1.4`
# References

9
orx-fcurve/src/commonMain/kotlin/EFCurve.kt
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@@ -8,17 +8,18 @@ import org.openrndr.extra.expressions.evaluateExpression
* @param constants a map of constants that is passed to [evaluateExpression]
*/
fun efcurve(ef: String, constants: Map<String, Double> = emptyMap()): String {
val expression = Regex("\\{([^_]+)\\}")
// IntelliJ falsely reports a redundant escape character. the escape character is required when running the regular
// expression on a javascript target. Removing the escape character will result in a `Lone quantifier brackets`
// syntax error.
@Suppress("RegExpRedundantEscape")
val repetition = Regex("""\|([^|]+)\|\[([^\[\]]+)\]""")
val expression = Regex("\\{([^{}]+)\\}")
@Suppress("RegExpRedundantEscape")
val list = Regex("\\|([^|]+)\\|\\{([^\\[\\]]+)\\}")
val repetition = Regex("""\(([^()]+)\)\[([^\[\]]+)\]""")
@Suppress("RegExpRedundantEscape")
val list = Regex("\\(([^()]+)\\)\\{([^\\[\\]]+)\\}")
/**
* perform comment substitution

10
orx-fcurve/src/commonTest/kotlin/TestEFCurve.kt
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@@ -5,7 +5,7 @@ import kotlin.test.assertEquals
class TestEFCurve {
@Test
fun comments() {
val text = """M1 |h5 m3|{
val text = """M1 (h5 m3){
|10.3 # toch wel handig zo'n comment
|11.2
|14.5
@@ -21,13 +21,13 @@ class TestEFCurve {
@Test
fun listExpansion() {
assertEquals("M0 L1.0, ${3.0} L1.0, ${6.0}", efcurve("M0 |L1.0, {it}|{3, 6}"))
assertEquals("M0 L1.0, ${3.0} L1.0, ${6.0}", efcurve("M0 (L1.0, {it}){3, 6}"))
}
@Test
fun repetition() {
assertEquals("M0 L1.0, 3.0 L1.0, 3.0", efcurve("M0 |L1.0, 3.0|[2]"))
assertEquals("M0 L1.0, ${0.0} L1.0, ${1.0}", efcurve("M0 |L1.0, {it}|[2]"))
assertEquals("M0 L1.0, ${0.0} L1.0, ${1.0} L1.0, ${0.0} L1.0, ${1.0} L1.0, ${0.0} L1.0, ${1.0}", efcurve("M0 ||L1.0, {it}|[2]|[3]"))
assertEquals("M0 L1.0, 3.0 L1.0, 3.0", efcurve("M0 (L1.0, 3.0)[2]"))
assertEquals("M0 L1.0, ${0.0} L1.0, ${1.0}", efcurve("M0 (L1.0, {it})[2]"))
assertEquals("M0 L1.0, ${0.0} L1.0, ${1.0} L1.0, ${0.0} L1.0, ${1.0} L1.0, ${0.0} L1.0, ${1.0}", efcurve("M0 ((L1.0, {it})[2])[3]"))
}
}