func parseMaterial(world *scene.Scene, jsondata map[string]interface{}, material_id string) (material *objects.Material) {
log.Println("Parsing Json Material")
materialdata := jsondata["materials"].(map[string]interface{})[material_id].(map[string]interface{})
material = new(objects.Material)
material.ID = material_id
material.Type = materialdata["type"].(string)
if materialdata["parameters"].(map[string]interface{})["materials"] == nil {
material.Color = util.Uint32toVec3ui8(uint32(materialdata["parameters"].(map[string]interface{})["color"].(float64)))
material.Ambient = util.Uint32toVec3ui8(uint32(materialdata["parameters"].(map[string]interface{})["ambient"].(float64)))
material.Emissive = util.Uint32toVec3ui8(uint32(materialdata["parameters"].(map[string]interface{})["emissive"].(float64)))
material.Transparent = materialdata["parameters"].(map[string]interface{})["transparent"].(bool)
material.Reflectivity = float32(materialdata["parameters"].(map[string]interface{})["reflectivity"].(float64))
material.Opacity = float32(materialdata["parameters"].(map[string]interface{})["opacity"].(float64))
material.Wireframe = materialdata["parameters"].(map[string]interface{})["wireframe"].(bool)
material.WireframeLinewidth = int32(materialdata["parameters"].(map[string]interface{})["wireframeLinewidth"].(float64))
} else {
materials := materialdata["parameters"].(map[string]interface{})["materials"].([]interface{})
for _, v := range materials {
id := v.(string)
if world.HasMaterial(id) {
material.Materials = append(material.Materials, world.GetMaterial(id))
} else {
material.Materials = append(material.Materials, parseMaterial(world, jsondata, id))
}
}
}
return
}
func Render(world *scene.Scene, w, h uint32, canvas *image.RGBA) {
for {
log.Println("Starting tracing rays")
world.Lock()
//generate principal ray(s)
principalRays := getPrincipalRays(world, w, h)
//intersect ray(s)
intersect(world, principalRays, canvas)
//get color
world.Unlock()
log.Println("Done tracing rays")
break
}
return
}
func parseObjects(world *scene.Scene, jsondata map[string]interface{}) {
items := jsondata["objects"].(map[string]interface{})
log.Println("Parsing Json Objects")
for k, v := range items {
if strings.Contains(k, "camera") {
val := v.(map[string]interface{})
world.Camera.Type = val["type"].(string)
world.Camera.FOV = float32(val["fov"].(float64) * (2 * math.Pi / 360))
world.Camera.Near = float32(val["near"].(float64))
world.Camera.Far = float32(val["far"].(float64))
// world.Camera.Position.X = float32(val["position"].([]interface{})[0].(float64))
// world.Camera.Position.Y = float32(val["position"].([]interface{})[1].(float64))
// world.Camera.Position.Z = float32(val["position"].([]interface{})[2].(float64))
// Let's override the camera position and put it in a sensible position
world.Camera.Position.X = 0
world.Camera.Position.Y = 0
world.Camera.Position.Z = float32((-1) * (800 / math.Tan((float64(world.Camera.FOV) / 2))))
world.Camera.Position.W = 1
world.Camera.Rotation = quaternion.Quaternion{X: 0, Y: 0, Z: 0, W: 1}
delete(items, k)
} else if strings.Contains(k, "light") {
var light objects.Light
val := v.(map[string]interface{})
light.Type = val["type"].(string)
light.Colour = util.Uint32toVec3ui8(uint32(val["color"].(float64)))
light.Intensity = float32(val["intensity"].(float64))
light.Direction.X = float32(val["direction"].([]interface{})[0].(float64))
light.Direction.Y = float32(val["direction"].([]interface{})[1].(float64))
light.Direction.Z = float32(val["direction"].([]interface{})[2].(float64))
light.Target = val["target"].(string)
world.Lights = append(world.Lights, light)
delete(items, k)
}
}
world.Objects = append(world.Objects, parsePhysicalObjects(world, jsondata, jsondata["objects"].(map[string]interface{}))...)
}
func parseGeometry(world *scene.Scene, jsondata map[string]interface{}, geometry_id string) (geometry *objects.Geometry) {
log.Println("Parsing Json Geometry")
embeds := jsondata["embeds"].(map[string]interface{})
geometrydata := jsondata["geometries"].(map[string]interface{})[geometry_id].(map[string]interface{})
geometry = new(objects.Geometry)
geometry.ID = geometry_id
if geometrydata["type"].(string) == "embedded" {
embed := embeds[geometrydata["id"].(string)].(map[string]interface{})
// Parse metadata
geometry.Metadata.Vertices = int32(embed["metadata"].(map[string]interface{})["vertices"].(float64))
geometry.Metadata.Normals = int32(embed["metadata"].(map[string]interface{})["normals"].(float64))
geometry.Metadata.Colors = int32(embed["metadata"].(map[string]interface{})["colors"].(float64))
geometry.Metadata.Faces = int32(embed["metadata"].(map[string]interface{})["faces"].(float64))
// Parse bounding box
geometry.BB.Min.X = float32(embed["boundingBox"].(map[string]interface{})["min"].([]interface{})[0].(float64))
geometry.BB.Min.Y = float32(embed["boundingBox"].(map[string]interface{})["min"].([]interface{})[1].(float64))
geometry.BB.Min.Z = float32(embed["boundingBox"].(map[string]interface{})["min"].([]interface{})[2].(float64))
geometry.BB.Max.X = float32(embed["boundingBox"].(map[string]interface{})["max"].([]interface{})[0].(float64))
geometry.BB.Max.Y = float32(embed["boundingBox"].(map[string]interface{})["max"].([]interface{})[1].(float64))
geometry.BB.Max.Z = float32(embed["boundingBox"].(map[string]interface{})["max"].([]interface{})[2].(float64))
geometry.Scale = float32(embed["scale"].(float64))
vertices := embed["vertices"].([]interface{})
for i := 0; i < len(vertices); {
v := vertex.NewVertex(float32(vertices[i].(float64)), float32(vertices[i+1].(float64)), float32(vertices[i+2].(float64)))
i += 3
world.Vertices = append(world.Vertices, *v)
geometry.Vertices = append(geometry.Vertices, &world.Vertices[len(world.Vertices)-1])
}
normals := embed["normals"].([]interface{})
for i := 0; i < len(normals); {
v := vertex.NewNormal(float32(normals[i].(float64)), float32(normals[i+1].(float64)), float32(normals[i+2].(float64)))
i += 3
world.Normals = append(world.Normals, *v)
geometry.Normals = append(geometry.Normals, &world.Normals[len(world.Normals)-1])
}
faces := embed["faces"].([]interface{})
for i := 0; i < len(faces); {
mask := uint32(faces[i].(float64))
i++
// is not triangle?
if isBitSet(mask, 0) {
log.Fatalln("Quads are not supported")
}
tri := triangle.Triangle{Vertices: [3]*vertex.Vertex{&world.Vertices[int32(faces[i].(float64))], &world.Vertices[int32(faces[i+1].(float64))], &world.Vertices[int32(faces[i+2].(float64))]}}
i += 3
// has face material
if isBitSet(mask, 1) {
log.Println("Ignoring face material, material defined in the geometry json")
i++
}
// has face uv
if isBitSet(mask, 2) {
log.Fatalln("Face UVs are not supported")
i++
}
// has face vertex uv
if isBitSet(mask, 3) {
log.Fatalln("Face vertex UVs are not supported")
i += 3
}
// has face normals
if isBitSet(mask, 4) {
log.Fatalln("Face normals are not supported")
i++
}
// has face vertex normals
if isBitSet(mask, 5) {
tri.Normals = [3]*vertex.Normal{&world.Normals[int32(faces[i].(float64))], &world.Normals[int32(faces[i+1].(float64))], &world.Normals[int32(faces[i+2].(float64))]}
i += 3
}
// has face color
if isBitSet(mask, 6) {
log.Fatalln("Face colors are not supported")
i++
}
if isBitSet(mask, 7) {
log.Fatalln("Face vertex colors are not supported")
i += 3
}
world.Triangles = append(world.Triangles, tri)
log.Println(tri)
}
} else {
log.Panicln("I don't know what to do with non-embedded geometry types!")
}
return
}