Light Rectangle

# Compatibility with Python 2.7.
from __future__ import print_function
# The directory containing the vray shared object should be present in the PYTHONPATH environment variable.
# Try to import the vray module from VRAY_SDK/python, if it is not in PYTHONPATH
import sys, os
VRAY_SDK = os.environ.get('VRAY_SDK')
if VRAY_SDK:
    sys.path.append(os.path.join(VRAY_SDK, 'python'))
import vray

SCENE_PATH = os.path.join(os.environ.get('VRAY_SDK'), 'scenes')
# Change process working directory to SCENE_PATH in order to be able to load relative scene resources.
os.chdir(SCENE_PATH)

# The renderer is automatically closed after the `with` block.
with vray.VRayRenderer() as renderer:
    # Register a simple log callback. Always useful for debugging.
    def dumpMsg(renderer, message, level, instant):
        if level == vray.LOGLEVEL_ERROR:
            print("[ERROR]", message)
        elif level == vray.LOGLEVEL_WARNING:
            print("[Warning]", message)
        elif level == vray.LOGLEVEL_INFO:
            print("[info]", message)
        # Uncomment for testing, but you might want to ignore these in real code
        #else: print("[debug]", message)
    renderer.setOnLogMessage(dumpMsg)
    # Load scene from a file.
    renderer.load(os.path.join(SCENE_PATH, 'lighting.vrscene'))
    # Remove original light source from the scene.
    del renderer.plugins["VRayLightDomeShape1"]
    texture = renderer.classes.TexRamp()
    # Specify the type of the Ramp texture.
    # Possible values are: 0 (V), 1 (U), 2 (U+V)/2, 3 (radial)
    #   4 (circular), 5 (box), 6 (UV), 7 (four corner), 8 (tartan)
    texture.type = 1
    # Specify colors of the texture.
    texture.colors = [
        vray.AColor(1, 0, 0, 1),
        vray.AColor(0, 1, 0, 1),
        vray.AColor(0, 0, 1, 1)
    ]
    # Specify positions for the colors.
    texture.positions = [0, 0.5, 1]
    # LightRectangle is a light source plugin that can be used to create physically accurate area lights.
    light = renderer.classes.LightRectangle()
    # Specify the light position, rotation and scale.
    light.transform = vray.Transform(
        vray.Matrix(
            vray.Vector(1, 0, 0),
            vray.Vector(0, 1, 0),
            vray.Vector(0, 0, 1)),
        vray.Vector(140.7293296245155, 56.40836324071937, 177.7345080979719))
    # Specify shadow offset from the surface. Helps to prevent polygonal shadow artifacts on low-poly surfaces.
    light.shadowBias = 0.02
    # Specify that the bumped normal should be used to check if the light direction is below the surface.
    light.bumped_below_surface_check = True
    # Specify the light intensity based on the 'units' parameter.
    light.intensity = 30
    # Specify the U dimension of the light (actually half-width).
    light.u_size = 40
    # Specify the V dimension of the light (actually half-height).
    light.v_size = 40
    # Specify the light texture.
    light.rect_tex = texture
    # Specify the use of a light texture. If "use_rect_tex = False" the 'color' of the light will be used instead.
    light.use_rect_tex = True
    # Start rendering.
    renderer.startSync()
    # Wait for rendering to end.
    renderer.waitForRenderEnd()

#define VRAY_RUNTIME_LOAD_PRIMARY
#include "vraysdk.hpp"
#include "vrayplugins.hpp"
#include "utils.h"

using namespace VRay;
using namespace VRay::Plugins;
using namespace std;

const char *BASE_PATH = getenv("VRAY_SDK");
string SCENE_PATH = (BASE_PATH ? string(BASE_PATH) : string(".")) + PATH_DELIMITER + "scenes";

int main() {
	// Change process working directory to SCENE_PATH in order to be able to load relative scene resources.
	changeCurrentDir(SCENE_PATH.c_str());
	// Load V-Ray SDK library.
	VRayInit init(NULL, true);
	// Create an instance of VRayRenderer with default options.
	// The renderer is automatically closed at the end of the current scope.
	VRayRenderer renderer;
	// It's recommended to always have a console log
	renderer.setOnLogMessage(logMessage);
	// Load scene from a file.
	renderer.load("lighting.vrscene");
	// Remove original light source from the scene.
	renderer.deletePlugin("VRayLightDomeShape1");
	TexRamp texture = renderer.newPlugin<TexRamp>();
	// Specify the type of the Ramp texture.
	// Possible values are:
	//   0 (V) - default, 1 (U), 2 (U + V) / 2, 3 (radial)
	//   4 (circular), 5 (box), 6 (UV), 7 (four corner), 8 (tartan)
	texture.set_type(1);
	// Specify colors of the texture.
	ValueList colors;
	colors.push_back(Value(AColor(1.0, 0.0, 0.0, 1.0)));
	colors.push_back(Value(AColor(0.0, 1.0, 0.0, 1.0)));
	colors.push_back(Value(AColor(0.0, 0.0, 1.0, 1.0)));
	texture.set_colors(colors);
	// Specify positions for the colors.
	ValueList positions;
	positions.push_back(Value(0));
	positions.push_back(Value(0.5f));
	positions.push_back(Value(1));
	texture.set_positions(positions);
	// LightRectangle is a light source plugin that can be used to create physically accurate area lights.
	LightRectangle light = renderer.newPlugin<LightRectangle>();
	// Specify the light position, rotation and scale.
	light.set_transform(Transform(
		Matrix(
			Vector(1.0, 0.0, 0.0),
			Vector(0.0, 1.0, 0.0),
			Vector(0.0, 0.0, 1.0)),
		Vector(140.7293296245155, 56.40836324071937, 177.7345080979719)));
	// Specify shadow offset from the surface. Helps to prevent polygonal shadow artifacts on low-poly surfaces.
	light.set_shadowBias(0.02f);
	// Specify that the bumped normal should be used to check if the light direction is below the surface.
	light.set_bumped_below_surface_check(true);
	// Specify the light intensity based on the 'units' parameter.
	light.set_intensity(30);
	// Specify the U dimension of the light (actually half-width).
	light.set_u_size(40);
	// Specify the V dimension of the light (actually half-height).
	light.set_v_size(40);
	// Specify the light texture.
	light.set_rect_tex(texture);
	// Specify the use of a light texture.
	// If "use_rect_tex = false" the 'color' of the light will be used instead.
	light.set_use_rect_tex(true);
	// Start rendering.
	renderer.startSync();
	// Wait for rendering to end.
	renderer.waitForRenderEnd();
	return 0;
}

using System;
using System.Collections.Generic;
using System.IO;
using VRay;
using VRay.Plugins;

namespace _texture
{
    class Program
    {
        static void Main(string[] args)
        {
            string SCENE_PATH = Path.Combine(Environment.GetEnvironmentVariable("VRAY_SDK"), "scenes");
            // Change process working directory to SCENE_PATH in order to be able to load relative scene resources.
            Directory.SetCurrentDirectory(SCENE_PATH);

            // Create an instance of VRayRenderer with default options. The renderer is automatically closed after the `using` block.
			using (VRayRenderer renderer = new VRayRenderer())
            {
                // Add a listener for any type of log message.
                renderer.LogMessage += new EventHandler<MessageEventArgs>((source, e) =>
                {
                    // You can remove the if for testing, but you might want to ignore Debug in real code
                    if (e.LogLevel != LogLevelType.Debug)
                    {
                        Console.WriteLine(String.Format("[{0}] {1}", e.LogLevel.ToString(), e.Message));
                    }
                });
                // Load scene from a file.
                renderer.Load("lighting.vrscene");
                // Remove original light source from the scene.
                renderer.DeletePlugin("VRayLightDomeShape1");
                TexRamp texture = renderer.NewPlugin<TexRamp>();
                // Specify the type of the Ramp texture.
                // Possible values are: 0 (V), 1 (U), 2 (U+V)/2, 3 (radial)
                //   4 (circular), 5 (box), 6 (UV), 7 (four corner), 8 (tartan)
                texture.TexRampType = 1;
                // Specify colors of the texture.
                texture.Colors = new List<object>() {
                    new AColor(1, 0, 0, 1),
                    new AColor(0, 1, 0, 1),
                    new AColor(0, 0, 1, 1)
                };
                // Specify positions for the colors.
                texture.Positions = new List<object>() { 0, 0.5, 1 };
                // LightRectangle is a light source plugin that can be used to create physically accurate area lights.
                LightRectangle light = renderer.NewPlugin<LightRectangle>();
                // Specify the light position, rotation and scale.
                light.Transform = new Transform(
                    new Matrix(
                        new Vector(1, 0, 0),
                        new Vector(0, 1, 0),
                        new Vector(0, 0, 1)),
                    new Vector(140.7293296245155, 56.40836324071937, 177.7345080979719));
                // Specify shadow offset from the surface. Helps to prevent polygonal shadow artifacts on low-poly surfaces.
                light.ShadowBias = 0.02F;
                // Specify that the bumped normal should be used to check if the light direction is below the surface.
                light.BumpedBelowSurfaceCheck = true;
                // Specify the number of parameter samples for motion blur.
                light.Nsamples = 1;
                // Specify the light intensity based on the 'units' parameter.
                light.Intensity = 30;
                // Specify the U dimension of the light (actually half-width).
                light.USize = 40;
                // Specify the V dimension of the light (actually half-height).
                light.VSize = 40;
                // Specify the light texture.
                light.RectTex = texture;
                // Specify the use of a light texture.
                // If "use_rect_tex = false" the 'color' of the light will be used instead.
                light.UseRectTex = true;
                // Start rendering.
                renderer.StartSync();
                // Wait for rendering to end.
                renderer.WaitForRenderEnd();
            }
        }
    }
}

var path = require('path');
var vray = require(path.join(process.env.VRAY_SDK, 'node', 'vray'));

var SCENE_PATH = path.join(process.env.VRAY_SDK, 'scenes');
// Change process working directory to SCENE_PATH in order to be able to load relative scene resources.
process.chdir(SCENE_PATH);

// Create an instance of VRayRenderer with default options.
var renderer = vray.VRayRenderer();
// It's recommended to always have a console log callback
renderer.on("logMessage", function(message, level, instant) {
	if (level == vray.LOGLEVEL_ERROR)
		console.log("[ERROR] ", message);
	else if (level == vray.LOGLEVEL_WARNING)
		console.log("[Warning] ", message);
	else if (level == vray.LOGLEVEL_INFO)
		console.log("[info] ", message);
	// Uncomment for testing, but you might want to ignore these in real code
	//else console.log("[debug] ", message);
});

// Load scene from a file asynchronously.
renderer.load("lighting.vrscene", function(err) {
    if (err) throw err;
    // Remove original light source from the scene.
    delete renderer.plugins["VRayLightDomeShape1"];
    var texture = renderer.classes.TexRamp();
    // Specify the type of the Ramp texture.
    // Possible values are: 0 (V), 1 (U), 2 (U+V)/2, 3 (radial)
    //   4 (circular), 5 (box), 6 (UV), 7 (four corner), 8 (tartan)
    texture.type = 1;
    // Specify colors of the texture.
    texture.colors = vray.List(
        vray.AColor(1, 0, 0, 1),
        vray.AColor(0, 1, 0, 1),
        vray.AColor(0, 0, 1, 1)
    );
    // Specify positions for the colors.
    texture.positions = vray.List(0, 0.5, 1);
    // LightRectangle is a light source plugin that can be used to create physically accurate area lights.
    var light = renderer.classes.LightRectangle();
    // Specify the light position, rotation and scale.
    light.transform = vray.Transform(
        vray.Matrix(
            vray.Vector(1, 0, 0),
            vray.Vector(0, 1, 0),
            vray.Vector(0, 0, 1)),
        vray.Vector(140.7293296245155, 56.40836324071937, 177.7345080979719));
    // Specify shadow offset from the surface. Helps to prevent polygonal shadow artifacts on low-poly surfaces.
    light.shadowBias = 0.02;
    // Specify that the bumped normal should be used to check if the light direction is below the surface.
    light.bumped_below_surface_check = true;
    // Specify the light intensity based on the 'units' parameter.
    light.intensity = 30;
    // Specify the U dimension of the light (actually half-width).
    light.u_size = 40;
    // Specify the V dimension of the light (actually half-height).
    light.v_size = 40;
    // Specify the light texture.
    light.rect_tex = texture;
    // Specify the use of a light texture. If "use_rect_tex = false" the 'color' of the light will be used instead.
    light.use_rect_tex = true;
    // Start rendering.
    renderer.start(function(err) {
        if (err) throw err;
        // Wait for rendering to end.
        renderer.waitForRenderEnd(function() {
            renderer.close();
        });
    });
});