Fix problem in UV coord generation of plane meshes
This commit is contained in:
Edwin Jakobs
18
orx-mesh-generators/build.gradle
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18
orx-mesh-generators/build.gradle
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sourceSets {
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demo {
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java {
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srcDirs = ["src/demo/kotlin"]
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compileClasspath += main.getCompileClasspath()
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runtimeClasspath += main.getRuntimeClasspath()
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}
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}
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}
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dependencies {
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demoImplementation(project(":orx-camera"))
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demoImplementation("org.openrndr:openrndr-core:$openrndrVersion")
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demoRuntimeOnly("org.openrndr:openrndr-gl3:$openrndrVersion")
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demoRuntimeOnly("org.openrndr:openrndr-gl3-natives-$openrndrOS:$openrndrVersion")
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demoImplementation(sourceSets.getByName("main").output)
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}
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35
orx-mesh-generators/src/demo/kotlin/DemoBox.kt
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35
orx-mesh-generators/src/demo/kotlin/DemoBox.kt
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import org.openrndr.application
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import org.openrndr.color.ColorRGBa
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import org.openrndr.draw.DrawPrimitive
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import org.openrndr.draw.colorBuffer
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import org.openrndr.draw.shadeStyle
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import org.openrndr.extras.camera.Orbital
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import org.openrndr.extras.meshgenerators.boxMesh
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fun main() {
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application {
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program {
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val box = boxMesh(1.0, 1.0, 1.0)
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val texture = colorBuffer(256, 256)
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val s = texture.shadow
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for (y in 0 until 256) {
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for (x in 0 until 256) {
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s[x, y] = ColorRGBa(x/256.0, y/256.0, 0.0, 1.0)
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}
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}
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s.upload()
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extend(Orbital())
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extend {
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drawer.background(ColorRGBa.PINK)
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drawer.shadeStyle = shadeStyle {
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fragmentTransform = """
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x_fill = texture(p_texture, va_texCoord0.xy);
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""".trimIndent()
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parameter("texture", texture)
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}
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drawer.vertexBuffer(box, DrawPrimitive.TRIANGLES)
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}
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}
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}
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}
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@@ -1,84 +1,84 @@
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package org.openrndr.extras.meshgenerators
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import org.openrndr.draw.VertexBuffer
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import org.openrndr.math.Vector2
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import org.openrndr.math.Vector3
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fun planeMesh(center: Vector3,
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right: Vector3,
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forward: Vector3,
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up: Vector3 = forward.cross(right).normalized,
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width: Double = 1.0, height: Double = 1.0,
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widthSegments: Int = 1, heightSegments: Int = 1): VertexBuffer {
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val vertexCount = (widthSegments * heightSegments) * 6
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val vb = meshVertexBuffer(vertexCount)
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vb.put {
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generatePlane(center, right, forward, up,
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width, height, widthSegments, heightSegments, bufferWriter(this))
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}
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return vb
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}
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/**
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* generates a finite plane with its center at (0,0,0) and spanning the xz-plane
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*/
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fun groundPlaneMesh(width: Double = 1.0,
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height: Double = 1.0,
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widthSegments: Int = 1,
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heightSegments: Int = 1): VertexBuffer {
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return planeMesh(Vector3.ZERO, Vector3.UNIT_X, Vector3.UNIT_Z, Vector3.UNIT_Y,
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width, height, widthSegments, heightSegments)
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}
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/**
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* generates a finite plane with its center at (0,0,0) and spanning the xy-plane
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*/
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fun wallPlaneMesh(width: Double = 1.0,
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height: Double = 1.0,
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widthSegments: Int = 1,
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heightSegments: Int = 1): VertexBuffer {
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return planeMesh(Vector3.ZERO, Vector3.UNIT_X, Vector3.UNIT_Y, Vector3.UNIT_Z,
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width, height, widthSegments, heightSegments)
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}
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fun generatePlane(center: Vector3,
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right: Vector3,
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forward: Vector3,
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up: Vector3 = forward.cross(right).normalized,
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width: Double = 1.0, height: Double = 1.0,
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widthSegments: Int = 1, heightSegments: Int = 2,
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writer: VertexWriter) {
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val forwardStep = forward.normalized * (height / heightSegments)
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val rightStep = right.normalized * (width / widthSegments)
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val corner = center - forward.normalized * (height*0.5) - right.normalized * (width * 0.5)
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val step = Vector2(1.0 / width, 1.0 / height)
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for (v in 0 until heightSegments) {
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for (u in 0 until widthSegments) {
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val uv00 = Vector2(u + 0.0, v + 0.0) * step
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val uv01 = Vector2(u + 0.0, v + 1.0) * step
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val uv10 = Vector2(u + 1.0, v + 0.0) * step
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val uv11 = Vector2(u + 1.0, v + 1.0) * step
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val c00 = corner + forwardStep * v.toDouble() + rightStep * u.toDouble()
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val c01 = corner + forwardStep * (v + 1).toDouble() + rightStep * u.toDouble()
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val c10 = corner + forwardStep * v.toDouble() + rightStep * (u + 1).toDouble()
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val c11 = corner + forwardStep * (v + 1).toDouble() + rightStep * (u + 1).toDouble()
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writer(c11, up, uv00)
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writer(c10, up, uv10)
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writer(c00, up, uv11)
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writer(c00, up, uv11)
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writer(c01, up, uv01)
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writer(c11, up, uv00)
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}
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}
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}
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package org.openrndr.extras.meshgenerators
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import org.openrndr.draw.VertexBuffer
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import org.openrndr.math.Vector2
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import org.openrndr.math.Vector3
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fun planeMesh(center: Vector3,
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right: Vector3,
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forward: Vector3,
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up: Vector3 = forward.cross(right).normalized,
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width: Double = 1.0, height: Double = 1.0,
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widthSegments: Int = 1, heightSegments: Int = 1): VertexBuffer {
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val vertexCount = (widthSegments * heightSegments) * 6
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val vb = meshVertexBuffer(vertexCount)
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vb.put {
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generatePlane(center, right, forward, up,
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width, height, widthSegments, heightSegments, bufferWriter(this))
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}
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return vb
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}
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/**
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* generates a finite plane with its center at (0,0,0) and spanning the xz-plane
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*/
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fun groundPlaneMesh(width: Double = 1.0,
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height: Double = 1.0,
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widthSegments: Int = 1,
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heightSegments: Int = 1): VertexBuffer {
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return planeMesh(Vector3.ZERO, Vector3.UNIT_X, Vector3.UNIT_Z, Vector3.UNIT_Y,
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width, height, widthSegments, heightSegments)
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}
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/**
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* generates a finite plane with its center at (0,0,0) and spanning the xy-plane
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*/
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fun wallPlaneMesh(width: Double = 1.0,
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height: Double = 1.0,
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widthSegments: Int = 1,
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heightSegments: Int = 1): VertexBuffer {
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return planeMesh(Vector3.ZERO, Vector3.UNIT_X, Vector3.UNIT_Y, Vector3.UNIT_Z,
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width, height, widthSegments, heightSegments)
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}
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fun generatePlane(center: Vector3,
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right: Vector3,
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forward: Vector3,
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up: Vector3 = forward.cross(right).normalized,
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width: Double = 1.0, height: Double = 1.0,
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widthSegments: Int = 1, heightSegments: Int = 2,
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writer: VertexWriter) {
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val forwardStep = forward.normalized * (height / heightSegments)
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val rightStep = right.normalized * (width / widthSegments)
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val corner = center - forward.normalized * (height*0.5) - right.normalized * (width * 0.5)
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val step = Vector2(1.0 / widthSegments, 1.0 / heightSegments)
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for (v in 0 until heightSegments) {
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for (u in 0 until widthSegments) {
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val uv00 = Vector2(u + 0.0, v + 0.0) * step
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val uv01 = Vector2(u + 0.0, v + 1.0) * step
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val uv10 = Vector2(u + 1.0, v + 0.0) * step
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val uv11 = Vector2(u + 1.0, v + 1.0) * step
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val c00 = corner + forwardStep * v.toDouble() + rightStep * u.toDouble()
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val c01 = corner + forwardStep * (v + 1).toDouble() + rightStep * u.toDouble()
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val c10 = corner + forwardStep * v.toDouble() + rightStep * (u + 1).toDouble()
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val c11 = corner + forwardStep * (v + 1).toDouble() + rightStep * (u + 1).toDouble()
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writer(c11, up, uv00)
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writer(c10, up, uv10)
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writer(c00, up, uv11)
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writer(c00, up, uv11)
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writer(c01, up, uv01)
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writer(c11, up, uv00)
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}
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}
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}
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