/
transparent_glass.go
145 lines (127 loc) · 4.83 KB
/
transparent_glass.go
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package scenes
import (
"fmt"
"github.com/eriklupander/pathtracer-ocl/cmd"
"github.com/eriklupander/pathtracer-ocl/internal/app/camera"
"github.com/eriklupander/pathtracer-ocl/internal/app/geom"
"github.com/eriklupander/pathtracer-ocl/internal/app/material"
"github.com/eriklupander/pathtracer-ocl/internal/app/obj"
"github.com/eriklupander/pathtracer-ocl/internal/app/shapes"
"math"
"os"
)
func GlassScene() func() *Scene {
return func() *Scene {
//cam := camera.NewCamera(cmd.Cfg.Width, cmd.Cfg.Height, math.Pi/3, geom.NewPoint(0, 0.13, -0.9), geom.NewPoint(0, 0.02, -.1))
cam := camera.NewCamera(cmd.Cfg.Width, cmd.Cfg.Height, math.Pi/3, geom.NewPoint(0, 0.1, -1.5), geom.NewPoint(0, 0.05, 0))
//cam := camera.NewCamera(cmd.Cfg.Width, cmd.Cfg.Height, math.Pi/3, geom.NewPoint(0.01, .05, 0.01), geom.NewPoint(0,0,0))
cam.FocalLength = cmd.Cfg.FocalLength
cam.Aperture = cmd.Cfg.Aperture
// left wall
leftWall := shapes.NewPlane()
leftWall.Label = "leftwall"
leftWall.SetTransform(geom.Translate(-.6, 0, 0))
leftWall.SetTransform(geom.RotateZ(math.Pi / 2))
leftWall.SetMaterial(material.NewDiffuse(0.75, 0.25, 0.25))
//
//// right wall
rightWall := shapes.NewPlane()
rightWall.Label = "rghtwall"
rightWall.SetTransform(geom.Translate(.6, 0, 0))
rightWall.SetTransform(geom.RotateZ(math.Pi / 2))
rightWall.SetMaterial(material.NewDiffuse(0.25, 0.25, 0.75))
// floor
floor := shapes.NewPlane()
floor.Label = "floor "
floor.SetTransform(geom.Translate(0, -.4, 0))
floor.SetMaterial(material.NewDiffuse(0.9, 0.8, 0.7))
// ceiling
ceil := shapes.NewPlane()
ceil.Label = "ceiling "
ceil.SetTransform(geom.Translate(0, .4, 0))
ceil.SetMaterial(material.NewDiffuse(0.9, 0.8, 0.7))
// back wall
backWall := shapes.NewPlane()
backWall.Label = "backwall"
backWall.SetTransform(geom.Translate(0, 0, .6))
backWall.SetTransform(geom.RotateX(math.Pi / 2))
backWall.SetMaterial(material.NewDiffuse(0.9, 0.8, 0.7))
// front wall
frontWall := shapes.NewPlane()
frontWall.Label = "frntwall"
frontWall.SetTransform(geom.Translate(0, 0, -2))
frontWall.SetTransform(geom.RotateX(math.Pi / 2))
frontWall.SetMaterial(material.NewDiffuse(0.9, 0.8, 0.7))
// left sphere
leftSphere := shapes.NewSphere()
leftSphere.Label = "left_spr"
leftSphere.SetTransform(geom.Translate(-0.2, -0.28, 0.25))
leftSphere.SetTransform(geom.Scale(0.12, 0.12, 0.12))
leftSphere.SetMaterial(material.NewMirror())
// right sphere
rightSphere := shapes.NewSphere()
rightSphere.Label = "right_spr"
rightSphere.SetTransform(geom.Translate(0.25, -0.28, 0.25))
rightSphere.SetTransform(geom.Scale(0.12, 0.12, 0.12))
rightSphere.SetMaterial(material.NewGlass())
// teapot model
mtrl := material.NewGlass()
mtrl.Reflectivity = 0.0
glassModel := glass(mtrl)
glassModel.Label = "glass "
// lightsources
lights := make([]shapes.Shape, 0)
for i := 0; i < 2; i++ {
for j := 0; j < 2; j++ {
light := shapes.NewCube()
light.Label = fmt.Sprintf("light %d-%d", i, j)
light.SetTransform(geom.Translate(-0.25+float64(i)*0.5, .4, -0.25+float64(j)*0.5))
light.SetTransform(geom.Scale(0.15, 0.001, 0.15))
light.SetMaterial(material.NewLightBulb())
light.Material.Emission = geom.NewColor(10, 10, 10)
light.Material.Color = geom.NewColor(1, 1, 1)
lights = append(lights, light)
}
}
// extra light (removed)
spotLight := shapes.NewSphere()
spotLight.SetTransform(geom.Translate(0.4, 0.2, -2.0))
spotLight.SetTransform(geom.Scale(0.2, 0.2, 0.2))
spotLight.SetMaterial(material.NewLightBulb())
shapes := []shapes.Shape{floor, ceil, leftWall, rightWall, backWall, frontWall, leftSphere, rightSphere, glassModel}
shapes = append(shapes, lights...)
return &Scene{
Camera: cam,
Objects: shapes,
}
}
}
func glass(mtrl material.Material) *shapes.Group {
data, err := os.ReadFile("assets/glass.obj")
if err != nil {
panic(err.Error())
}
model := obj.ParseObj(string(data))
group := model.ToGroup()
// iterate over all triangles _before_ doing BVH divide to compute vertex normals since the teapot
// model doesn't have pre-computed vertex models stored in the .obj file.
tris := make([]*shapes.Triangle, 0)
for i := range group.Children[0].(*shapes.Group).Children {
tris = append(tris, group.Children[0].(*shapes.Group).Children[i].(*shapes.Triangle))
}
for i := range group.Children[1].(*shapes.Group).Children {
tris = append(tris, group.Children[1].(*shapes.Group).Children[i].(*shapes.Triangle))
}
obj.ComputeVertexNormals(tris)
group.Bounds()
fmt.Printf("completed bounds, first pass\n")
group.SetTransform(geom.Translate(-0.3, -0.395, -0.2))
group.SetTransform(geom.Scale(0.03, 0.03, 0.03))
group.SetMaterial(mtrl)
fmt.Printf("start divide...")
shapes.Divide(group, 50)
fmt.Printf("done!\n")
group.Bounds()
fmt.Printf("completed bounds, second pass\n")
return group
}