60 lines
1.9 KiB
Kotlin
60 lines
1.9 KiB
Kotlin
import org.openrndr.WindowMultisample
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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.CullTestPass
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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.extra.camera.Orbital
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import org.openrndr.extra.meshgenerators.boxMesh
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import org.openrndr.math.Vector3
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/**
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* Demonstrates how to create a 3D mesh box by specifying its width, height and depth.
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*
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* The `box` is a `VertexBuffer` and contains texture coordinates which can be
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* used to apply a texture to its faces.
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*
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* After creating the box, the program creates a texture with a gradient.
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* In it, the red component increases along the x-axis and the green component
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* along the y-axis.
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*
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* The scene is rendered with an interactive `Orbital` 3D camera.
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*
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* A shade style is used to apply the texture to the box.
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*
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*/
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fun main() = application {
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configure {
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width = 720
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height = 720
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multisample = WindowMultisample.SampleCount(8)
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}
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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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eye = Vector3(1.0, 1.0, 1.0)
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}
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extend {
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drawer.clear(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.drawStyle.cullTestPass = CullTestPass.FRONT
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drawer.vertexBuffer(box, DrawPrimitive.TRIANGLES)
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}
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}
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} |