svg.plane <- function(corners, col='blue', emissive=rgb(0.03, 0.15, 0.21), opacity = 1, name = 'sphere',
seg = 30, ontop = FALSE, create.uvs = FALSE, return.shape = FALSE, plot = TRUE){
# Make sure that type is webgl
#if('live' != getOption("svgviewr_glo_type")) stop("Plane drawing is currently only available with webgl svgViewR output.")
# Duplicate single segment value
if(length(seg) == 1) seg <- rep(seg, 2)
# Create plane mesh
plane_mesh <- create_plane_mesh(corners=corners, seg=seg, create.uvs=create.uvs)
# Get vertices and faces
vertices <- plane_mesh$vertices
faces <- plane_mesh$faces
# If not plotting, return vertices and faces
if(!plot) return(list('vertices'=vertices, 'faces'=faces))
if('svg' == getOption("svgviewr_glo_type")){
svg.points(vertices[1,], col='red')
svg.points(vertices[2:(nrow(vertices)-1), ])
svg.points(vertices[nrow(vertices),], col='blue')
svg.text(vertices, labels=0:(nrow(vertices)-1), font.size=0.8)
svg.text(vertices, labels=paste0(signif(plane_mesh$vertices_norm[,1],2), ',', signif(plane_mesh$vertices_norm[,2],2)), font.size=0.3, col='red')
# Draw faces
faces <- faces[!is.na(faces[,1]), ]
faces <- cbind(faces, faces[,1])
svg.pathsC(lapply(seq_len(nrow(faces)), function(i) faces[i,]+1), col='black', opacity.fill=0.2)
}else{
# Get viewer environment
env <- as.environment(getOption("svgviewr_glo_env"))
# Add to meshes
add_at <- length(svgviewr_env$svg$mesh)+1
# Add vertices
svgviewr_env$svg$mesh[[add_at]] <- list()
svgviewr_env$svg$mesh[[add_at]]$name <- name
svgviewr_env$svg$mesh[[add_at]]$vertices <- t(vertices)
svgviewr_env$svg$mesh[[add_at]]$faces <- t(faces)
svgviewr_env$svg$mesh[[add_at]]$col <- setNames(webColor(col), NULL)
svgviewr_env$svg$mesh[[add_at]]$opacity <- setNames(opacity, NULL)
svgviewr_env$svg$mesh[[add_at]]$emissive <- setNames(webColor(emissive), NULL)
svgviewr_env$svg$mesh[[add_at]]$computeVN <- TRUE
svgviewr_env$svg$mesh[[add_at]]$parseModel <- FALSE
svgviewr_env$svg$mesh[[add_at]]$depthTest <- !ontop
# Add object reference data
svgviewr_env$ref$names <- c(svgviewr_env$ref$names, name)
svgviewr_env$ref$num <- c(svgviewr_env$ref$num, add_at)
svgviewr_env$ref$type <- c(svgviewr_env$ref$type, 'mesh')
# Add limits
if(!is.null(corners)){
obj_ranges <- apply(corners, 2, 'range', na.rm=TRUE)
}else{
obj_ranges <- apply(vertices, 2, 'range', na.rm=TRUE)
}
# Set corners
corners <- lim2corners(obj_ranges)
# Add limits to object
svgviewr_env$svg$mesh[[add_at]][['lim']] <- obj_ranges
svgviewr_env$svg$mesh[[add_at]][['corners']] <- corners
}
if(return.shape){
return(list('vertices'=vertices, 'faces'=faces))
}else{
# Suppress return of value in console
return(NULL)
}
}
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