kaze/orx
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[orx-mesh-generators] Add comments for resolveMesh(), capMesh() (#254)

Browse Source
This commit is contained in:
Abe Pazos
2022-08-10 20:57:22 +00:00
committed by GitHub
parent ee9c5e0f70
commit 09cb062154
5 changed files with 131 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
orx-mesh-generators/build.gradle
View File

@@ -10,6 +10,7 @@ sourceSets {
dependencies {
demoImplementation(project(":orx-camera"))
demoImplementation(project(":orx-shapes"))
demoImplementation(libs.openrndr.application)
demoImplementation(libs.openrndr.extensions)
demoRuntimeOnly(libs.openrndr.gl3.core)

65
orx-mesh-generators/src/demo/kotlin/DemoAll.kt Normal file
View File

@@ -0,0 +1,65 @@
import org.openrndr.application
import org.openrndr.color.ColorRGBa
import org.openrndr.draw.*
import org.openrndr.extra.meshgenerators.*
import org.openrndr.extra.shapes.grid
import org.openrndr.math.Vector2
import org.openrndr.math.Vector3
import org.openrndr.shape.Rectangle
fun main() {
application {
program {
val meshes = listOf(
boxMesh(1.0, 1.0, 1.0),
sphereMesh(radius = 0.5),
dodecahedronMesh(0.5),
cylinderMesh(radius = 0.5, length = 1.0),
planeMesh(Vector3.ZERO, Vector3.UNIT_X, Vector3.UNIT_Y),
capMesh(
15, 0.5,
listOf(Vector2.ZERO, Vector2(0.5, 0.2), Vector2.UNIT_X)
),
revolveMesh(5, 0.5)
)
val texture = colorBuffer(256, 256)
val s = texture.shadow
for (y in 0 until 256) {
for (x in 0 until 256) {
s[x, y] = ColorRGBa(x / 256.0, y / 256.0, 0.0, 1.0)
}
}
s.upload()
val positions = Rectangle.fromCenter(Vector2.ZERO, width * 0.01, height * 0.01)
.grid(4, 2).flatten().map {
it.center.vector3(z = -5.0)
}
extend {
drawer.clear(ColorRGBa.PINK)
drawer.perspective(60.0, width * 1.0 / height, 0.01, 1000.0)
drawer.depthWrite = true
drawer.depthTestPass = DepthTestPass.LESS_OR_EQUAL
drawer.shadeStyle = shadeStyle {
fragmentTransform = """
float light = dot(v_worldNormal, p_light) * 0.5 + 0.5;
x_fill = texture(p_texture, va_texCoord0.xy);
x_fill.rgb *= light;
""".trimIndent()
parameter("texture", texture)
parameter("light", Vector3(1.0).normalized)
}
meshes.forEachIndexed { i, mesh ->
drawer.isolated {
translate(positions[i])
rotate(Vector3.UNIT_Y, seconds * 12)
rotate(Vector3.UNIT_X, seconds * 25)
vertexBuffer(mesh, DrawPrimitive.TRIANGLES)
}
}
}
}
}
}

2
orx-mesh-generators/src/demo/kotlin/DemoBox.kt
View File

@@ -12,6 +12,7 @@ fun main() {
application {
program {
val box = boxMesh(1.0, 1.0, 1.0)
val texture = colorBuffer(256, 256)
val s = texture.shadow
for (y in 0 until 256) {
@@ -20,6 +21,7 @@ fun main() {
}
}
s.upload()
if (System.getProperty("takeScreenshot") == "true") {
extend(SingleScreenshot()) {
this.outputFile = System.getProperty("screenshotPath")

66
orx-mesh-generators/src/main/kotlin/Cap.kt
View File

@@ -1,12 +1,38 @@
package org.openrndr.extra.meshgenerators
import org.openrndr.math.Matrix44
import org.openrndr.math.Vector2
import org.openrndr.math.Vector3
import org.openrndr.math.YPolarity
import org.openrndr.draw.VertexBuffer
import org.openrndr.math.*
import org.openrndr.math.transforms.rotateY
fun generateCap(sides: Int, radius: Double, enveloppe: List<Vector2> = listOf(Vector2(0.0, 0.0), Vector2(1.0, 0.0)), writer: VertexWriter) {
/**
* A shape created by rotating an envelope around a vertical axis.
* The default envelope is a horizontal line which produces a flat round disk.
* By providing a more complex envelop one can create curved shapes like a bowl.
*/
fun capMesh(
sides: Int,
radius: Double,
enveloppe: List<Vector2> = listOf(
Vector2(0.0, 0.0),
Vector2(1.0, 0.0)
)
): VertexBuffer {
val vb = meshVertexBuffer(6 * sides * (enveloppe.size - 1))
vb.put {
generateCap(sides, radius, enveloppe, bufferWriter(this))
}
return vb
}
fun generateCap(
sides: Int,
radius: Double,
enveloppe: List<Vector2> = listOf(
Vector2(0.0, 0.0),
Vector2(1.0, 0.0)
),
writer: VertexWriter
) {
val maxX = enveloppe.maxByOrNull { it.x } ?: Vector2(1.0, 0.0)
val a = maxX.x
@@ -50,7 +76,34 @@ fun generateCap(sides: Int, radius: Double, enveloppe: List<Vector2> = listOf(Ve
}
}
fun generateRevolve(sides: Int, length: Double, enveloppe: List<Vector2> = listOf(Vector2(1.0, 0.0), Vector2(1.0, 1.0)), writer: VertexWriter) {
/**
* A shape created by rotating an envelope around a vertical axis.
* The default envelope is a vertical line which produces a hollow cylinder.
*/
fun revolveMesh(
sides: Int,
length: Double,
enveloppe: List<Vector2> = listOf(
Vector2(1.0, 0.0),
Vector2(1.0, 1.0)
)
): VertexBuffer {
val vb = meshVertexBuffer(6 * sides * (enveloppe.size - 1))
vb.put {
generateRevolve(sides, length, enveloppe, bufferWriter(this))
}
return vb
}
fun generateRevolve(
sides: Int,
length: Double,
enveloppe: List<Vector2> = listOf(
Vector2(1.0, 0.0),
Vector2(1.0, 1.0)
),
writer: VertexWriter
) {
val maxY = enveloppe.maxByOrNull { it.y } ?: Vector2(0.0, 1.0)
val a = maxY.y
@@ -59,7 +112,6 @@ fun generateRevolve(sides: Int, length: Double, enveloppe: List<Vector2> = listO
val normals2D = enveloppe.zipWithNext().map {
val d = it.second - it.first
d.normalized.perpendicular() * Vector2(1.0, -1.0)
}
val basePositions = cleanEnveloppe.map { Vector3(it.x, it.y, 0.0) }

5
orx-mesh-generators/src/main/kotlin/GeneratorBuffer.kt
View File

@@ -6,7 +6,6 @@ import org.openrndr.math.Vector2
import org.openrndr.math.Vector3
import org.openrndr.math.transforms.normalMatrix
import org.openrndr.math.transforms.rotate
import org.openrndr.math.transforms.transform
import org.openrndr.shape.Shape
import java.nio.ByteBuffer
import java.nio.ByteOrder
@@ -121,6 +120,10 @@ fun GeneratorBuffer.cylinder(sides: Int, segments: Int, radius: Double, length:
generateCylinder(sides, segments, radius, length, invert, this::write)
}
fun GeneratorBuffer.dodecahedron(radius: Double) {
generateDodecahedron(radius, this::write)
}
fun GeneratorBuffer.taperedCylinder(sides: Int, segments: Int, startRadius: Double, endRadius: Double, length: Double, invert: Boolean = false) {
generateTaperedCylinder(sides, segments, startRadius, endRadius, length, invert, this::write)
}