61 lines
1.9 KiB
Kotlin
61 lines
1.9 KiB
Kotlin
// Demonstration of circles that always face the camera
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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.*
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import org.openrndr.extra.noise.uniformRing
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import org.openrndr.extras.camera.Orbital
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import org.openrndr.math.Vector2
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import org.openrndr.math.Vector3
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suspend fun main() = application {
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configure {
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multisample = WindowMultisample.SampleCount(8)
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}
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program {
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extend(Orbital())
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val circlePositions = vertexBuffer(vertexFormat {
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attribute("position", VertexElementType.VECTOR3_FLOAT32)
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attribute("scale", VertexElementType.FLOAT32)
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}, 1000)
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circlePositions.put {
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for (i in 0 until circlePositions.vertexCount) {
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write(Vector3.uniformRing(0.0, 3.0))
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write(Math.random().toFloat()*0.1f)
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}
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}
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extend {
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drawer.perspective(90.0, width*1.0/height*1.0, 0.1, 100.0)
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drawer.fill = ColorRGBa.PINK
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drawer.stroke = ColorRGBa.GREEN
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drawer.strokeWeight = 0.05
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drawer.drawStyle.alphaToCoverage = true
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drawer.depthWrite = true
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drawer.depthTestPass = DepthTestPass.LESS_OR_EQUAL
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drawer.shadeStyle = shadeStyle {
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vertexTransform = """
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vec3 viewOffset = (x_viewMatrix * x_modelMatrix * vec4(i_position, 1.0)).xyz;
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vec2 i = vec2(0.0, 1.0);
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x_viewMatrix = mat4(i.yxxx, i.xyxx, i.xxyx, i.xxxy);
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x_modelMatrix = mat4(i.yxxx, i.xyxx, i.xxyx, i.xxxy);
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x_position = viewOffset + vec3(a_position.xy * i_scale, 0.0);
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vi_radius = vec2(i_scale);
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""".trimIndent()
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attributes(circlePositions)
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}
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drawer.circles((0 until circlePositions.vertexCount).map { Vector2.ZERO }, 0.0)
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}
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}
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} |