88 lines
2.6 KiB
Kotlin
88 lines
2.6 KiB
Kotlin
package org.openrndr.extras.camera
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import org.openrndr.Extension
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import org.openrndr.Program
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import org.openrndr.color.ColorRGBa
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import org.openrndr.draw.*
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import org.openrndr.math.Matrix33
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import org.openrndr.math.Matrix44
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import org.openrndr.math.Vector3
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@Suppress("unused")
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class AxisHelper(var size: Int = 80) : Extension {
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override var enabled: Boolean = true
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val fbo = renderTarget(size, size) {
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colorBuffer()
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depthBuffer()
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}
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val side = size.toDouble()
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val axisLength = size / 2.0
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val planeLength = axisLength + 10.0
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override fun afterDraw(drawer: Drawer, program: Program) {
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draw(drawer)
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}
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fun draw(drawer: Drawer) {
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val viewMatrix = drawer.view
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val projMatrix = drawer.projection
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val x = drawer.width - (size + 5.0)
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val y = 5.0
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drawer.isolatedWithTarget(fbo) {
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drawer.view = Matrix44.IDENTITY
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drawer.model = Matrix44.IDENTITY
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drawer.drawStyle.depthTestPass = DepthTestPass.ALWAYS
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drawer.ortho(0.0, side, 0.0, side, -1.0, 1.0)
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drawer.background(ColorRGBa.TRANSPARENT)
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drawer.stroke = null
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drawer.fill = ColorRGBa.PINK.opacify(0.7)
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drawer.circle(axisLength, axisLength, axisLength)
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drawer.ortho(-planeLength, planeLength, -planeLength, planeLength, -planeLength, planeLength)
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drawer.view = getRotation(viewMatrix)
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drawer.strokeWeight = 0.6
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drawer.fill = ColorRGBa.RED
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drawer.stroke = ColorRGBa.RED
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drawer.lineSegment(Vector3.ZERO, Vector3.UNIT_X * axisLength)
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drawer.fill = ColorRGBa.GREEN
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drawer.stroke = ColorRGBa.GREEN
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drawer.lineSegment(Vector3.ZERO, Vector3.UNIT_Y * axisLength)
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drawer.fill = ColorRGBa.BLUE
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drawer.stroke = ColorRGBa.BLUE
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drawer.lineSegment(Vector3.ZERO, Vector3.UNIT_Z * axisLength)
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}
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drawer.view = Matrix44.IDENTITY
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drawer.model = Matrix44.IDENTITY
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drawer.ortho()
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drawer.isolated {
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val cb = fbo.colorBuffer(0)
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drawer.image(cb, x, y, side, side)
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}
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drawer.view = viewMatrix
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drawer.projection = projMatrix
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}
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}
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internal fun getRotation(mat: Matrix44): Matrix44 {
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val mat3 = mat.matrix33 // without translation
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val c0 = mat3[0].length
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val c1 = mat3[1].length
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val c2 = mat3[2].length
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return Matrix33(
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mat3.c0r0 / c0, mat3.c1r0 / c1, mat3.c2r0 / c2,
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mat3.c0r1 / c0, mat3.c1r1 / c1, mat3.c2r1 / c2,
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mat3.c0r2 / c0, mat3.c1r2 / c1, mat3.c2r2 / c2
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).matrix44
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} |