Improve lights

crates/processing_core/src/error.rs

@@ -32,6 +32,10 @@ pub enum ProcessingError {
     TransformNotFound,
     #[error("Material not found")]
     MaterialNotFound,
+    #[error("Light not found")]
+    LightNotFound,
+    #[error("Light belongs to another graphics")]
+    LightOnOtherGraphics,
     #[error("Unknown shader property: {0}")]
     UnknownShaderProperty(String),
     #[error("GLTF load error: {0}")]

crates/processing_ffi/src/lib.rs

@@ -2856,6 +2856,18 @@ pub extern "C" fn processing_light_create_spot(
     .unwrap_or(0)
 }
 
+#[unsafe(no_mangle)]
+pub extern "C" fn processing_light(graphics_id: u64, light_id: u64) {
+    error::clear_error();
+    error::check(|| graphics_light(Entity::from_bits(graphics_id), Entity::from_bits(light_id)));
+}
+
+#[unsafe(no_mangle)]
+pub extern "C" fn processing_light_destroy(light_id: u64) {
+    error::clear_error();
+    error::check(|| light_destroy(Entity::from_bits(light_id)));
+}
+
 #[unsafe(no_mangle)]
 pub extern "C" fn processing_material_create_pbr() -> u64 {
     error::clear_error();

crates/processing_pyo3/examples/Basics/Camera/move_eye.py

@@ -4,19 +4,16 @@
 # The camera lifts up (controlled by mouseY) while looking at the same point.
 from mewnala import *
 
-light = None
-
 
 def setup():
-    global light
     size(640, 360)
     mode_3d()
     fill(0.8)
-    light = directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     roughness(0.6)
 
 
 def draw():
+    directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     background(0.0)
 
     # Change height of the camera with mouseY (the world is y-up)

crates/processing_pyo3/examples/Basics/Camera/orthographic.py

@@ -9,21 +9,19 @@
 from mewnala import *
 
 show_perspective = False
-light = None
 
 
 def setup():
-    global light
     size(600, 360)
     mode_3d()
     no_fill()
     fill(1.0)
     no_stroke()
-    light = directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     roughness(0.6)
 
 
 def draw():
+    directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     background(0.0)
     far = remap(mouse_x, 0, width, 120, 400)
     if show_perspective:

crates/processing_pyo3/examples/Basics/Camera/perspective.py

@@ -13,19 +13,16 @@
 # to set the area precisely.
 from mewnala import *
 
-light = None
-
 
 def setup():
-    global light
     size(640, 360)
     mode_3d()
     no_stroke()
-    light = directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     roughness(0.6)
 
 
 def draw():
+    directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     background(0.0)
     camera_y = height / 2.0
     # A fov of 0 would divide by zero below

crates/processing_pyo3/examples/Basics/Form/primitives_3d.py

@@ -11,12 +11,12 @@
 def setup():
     size(640, 360)
     mode_3d()
-    directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     roughness(0.6)
     no_loop()
 
 
 def draw():
+    directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     background(0.0)
 
     no_stroke()

crates/processing_pyo3/examples/Basics/Lights/directional.py

@@ -7,17 +7,13 @@
 # scatters in all directions.
 from mewnala import *
 
-light = None
-
 
 def setup():
-    global light
     size(640, 360)
     mode_3d()
     no_stroke()
     fill(0.8)
-    # Lights are created once; the shapes become lit once a material property is set
-    light = directional_light((0.8, 0.8, 0.8), 2500.0)
+    # The shapes become lit once a material property is set
     roughness(0.6)
 
 
@@ -27,7 +23,7 @@ def draw():
     dir_y = (mouse_y / height - 0.5) * 2
     dir_x = (mouse_x / width - 0.5) * 2
     # The world is y-up, so the vertical direction is flipped
-    light.look_at(-dir_x, dir_y, -1)
+    directional_light((0.8, 0.8, 0.8), 2500.0, look_at=(-dir_x, dir_y, -1))
     translate(-100, 0, 0)
     sphere(80)
     translate(200, 0, 0)

crates/processing_pyo3/examples/Basics/Lights/mixture.py

@@ -4,37 +4,32 @@
 # Display a box with three different kinds of lights.
 from mewnala import *
 
-point = None
-directional = None
-spot = None
-
 
 def setup():
-    global point, directional, spot
     size(640, 360)
     mode_3d()
     no_stroke()
+    roughness(0.6)
+
+
+def draw():
+    background(0.0)
 
-    # Lights are created once; the world is y-up, so the y of every
-    # position and direction is flipped
+    # The world is y-up, so the y of every position and direction is flipped
     # Orange point light on the right
-    point = point_light((0.59, 0.39, 0.0), 3000000000.0, 600.0, 1.0,  # Color
-                        position=(200, 150, 0))  # Position
+    point_light((0.59, 0.39, 0.0), 3000000000.0, 600.0, 1.0,  # Color
+                position=(200, 150, 0))  # Position
 
     # Blue directional light from the left
-    directional = directional_light((0.0, 0.4, 1.0), 4000.0,  # Color
-                                    look_at=(1, 0, 0))  # The x-, y-, z-axis direction
+    directional_light((0.0, 0.4, 1.0), 4000.0,  # Color
+                      look_at=(1, 0, 0))  # The x-, y-, z-axis direction
 
     # Yellow spotlight from the front
-    spot = spot_light((1.0, 1.0, 0.43), 2000000000.0, 600.0, 1.0,  # Color
-                      PI / 4, PI / 2,  # Angle, concentration
-                      position=(0, -40, 200),  # Position
-                      look_at=(0, -40 + 0.5, 200 - 0.5))  # Direction
-    roughness(0.6)
-
+    spot_light((1.0, 1.0, 0.43), 2000000000.0, 600.0, 1.0,  # Color
+               PI / 4, PI / 2,  # Angle, concentration
+               position=(0, -40, 200),  # Position
+               look_at=(0, -40 + 0.5, 200 - 0.5))  # Direction
 
-def draw():
-    background(0.0)
     rotate_y(remap(mouse_x, 0, width, 0, PI))
     rotate_x(remap(mouse_y, 0, height, 0, PI))
     box(150)

crates/processing_pyo3/examples/Basics/Lights/mixture_grid.py

@@ -4,20 +4,17 @@
 # Display a 2D grid of boxes with three different kinds of lights.
 from mewnala import *
 
-point = None
-directional = None
-spot = None
-
 
 def setup():
     size(640, 360)
     mode_3d()
     no_stroke()
-    define_lights()
+    roughness(0.6)
 
 
 def draw():
     background(0.0)
+    define_lights()
 
     for x in range(0, width + 1, 60):
         for y in range(0, height + 1, 60):
@@ -30,23 +27,21 @@ def draw():
 
 
 def define_lights():
-    global point, directional, spot
-    # The lights are created once, placed relative to the top-left corner
-    # as in the original (the world is centered and y-up)
+    # The lights are placed relative to the top-left corner as in the
+    # original (the world is centered and y-up)
     # Orange point light on the right
-    point = point_light((0.59, 0.39, 0.0), 3000000000.0, 600.0, 1.0,  # Color
-                        position=(200 - width / 2, height / 2 + 150, 0))  # Position
+    point_light((0.59, 0.39, 0.0), 3000000000.0, 600.0, 1.0,  # Color
+                position=(200 - width / 2, height / 2 + 150, 0))  # Position
 
     # Blue directional light from the left
-    directional = directional_light((0.0, 0.4, 1.0), 4000.0,  # Color
-                                    look_at=(1, 0, 0))  # The x-, y-, z-axis direction
+    directional_light((0.0, 0.4, 1.0), 4000.0,  # Color
+                      look_at=(1, 0, 0))  # The x-, y-, z-axis direction
 
     # Yellow spotlight from the front
-    spot = spot_light((1.0, 1.0, 0.43), 2000000000.0, 600.0, 1.0,  # Color
-                      PI / 4, PI / 2,  # Angle, concentration
-                      position=(-width / 2, height / 2 - 40, 200),  # Position
-                      look_at=(-width / 2, height / 2 - 40 + 0.5, 200 - 0.5))  # Direction
-    roughness(0.6)
+    spot_light((1.0, 1.0, 0.43), 2000000000.0, 600.0, 1.0,  # Color
+               PI / 4, PI / 2,  # Angle, concentration
+               position=(-width / 2, height / 2 - 40, 200),  # Position
+               look_at=(-width / 2, height / 2 - 40 + 0.5, 200 - 0.5))  # Direction
 
 
 run()

crates/processing_pyo3/examples/Basics/Lights/on_off.py

@@ -6,19 +6,17 @@
 from mewnala import *
 
 spin = 0.0
-light = None
 
 
 def setup():
-    global light
     size(640, 360)
     mode_3d()
     no_stroke()
-    light = directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
 
 
 def draw():
     global spin
+    directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     background(0.2)
 
     # A lit material turns the lights on; unlit() turns them off

crates/processing_pyo3/examples/Basics/Lights/reflection.py

@@ -5,19 +5,16 @@
 # with the horizontal position of the mouse.
 from mewnala import *
 
-light = None
-
 
 def setup():
-    global light
     size(640, 360)
     mode_3d()
     no_stroke()
     fill(0.4)
-    light = directional_light((0.8, 0.8, 0.8), 4000.0, look_at=(0, 0, -1))
 
 
 def draw():
+    directional_light((0.8, 0.8, 0.8), 4000.0, look_at=(0, 0, -1))
     background(0.0)
     # A smoother (less rough) material gives a stronger specular highlight
     s = mouse_x / width

crates/processing_pyo3/examples/Basics/Lights/spot.py

@@ -4,40 +4,32 @@
 # of a blue spot light.
 from mewnala import *
 
-bottom = None
-orange = None
-blue = None
-
 
 def setup():
-    global bottom, orange, blue
     size(640, 360)
     mode_3d()
     no_stroke()
     fill(0.8)
-
-    # Lights are created once and positioned relative to the top-left corner
-    # as in the original (the world is centered and y-up)
-    # Light the bottom of the sphere
-    bottom = directional_light((0.2, 0.4, 0.49), 4000.0, look_at=(0, 1, 0))
-
-    # Orange light on the upper-right of the sphere
-    orange = spot_light((0.8, 0.6, 0.0), 10000000000.0, 1200.0, 1.0, 0.0, PI / 12,
-                        position=(360 - width / 2, height / 2 - 160, 600),
-                        look_at=(360 - width / 2, height / 2 - 160, 0))
-
-    # Moving spotlight that follows the mouse
-    blue = spot_light((0.4, 0.6, 0.8), 10000000000.0, 1200.0, 1.0, 0.0, PI / 12,
-                      position=(360 - width / 2, height / 2, 600),
-                      look_at=(360 - width / 2, height / 2, 0))
     roughness(0.6)
 
 
 def draw():
     background(0.0)
 
-    blue.position(360 - width / 2, height / 2 - mouse_y, 600)
-    blue.look_at(360 - width / 2, height / 2 - mouse_y, 0)
+    # Lights are positioned relative to the top-left corner as in the
+    # original (the world is centered and y-up)
+    # Light the bottom of the sphere
+    directional_light((0.2, 0.4, 0.49), 4000.0, look_at=(0, 1, 0))
+
+    # Orange light on the upper-right of the sphere
+    spot_light((0.8, 0.6, 0.0), 10000000000.0, 1200.0, 1.0, 0.0, PI / 12,
+               position=(360 - width / 2, height / 2 - 160, 600),
+               look_at=(360 - width / 2, height / 2 - 160, 0))
+
+    # Moving spotlight that follows the mouse
+    spot_light((0.4, 0.6, 0.8), 10000000000.0, 1200.0, 1.0, 0.0, PI / 12,
+               position=(360 - width / 2, height / 2 - mouse_y, 600),
+               look_at=(360 - width / 2, height / 2 - mouse_y, 0))
 
     sphere(120, 60, 60)
 

crates/processing_pyo3/examples/Basics/Shape/load_display_obj.py

@@ -14,12 +14,12 @@ def setup():
     size(640, 360)
     mode_3d()
     rocket = load_model("data/rocket.obj")  # GAP: load_model() (OBJ with .mtl and texture) is missing
-    directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     roughness(0.6)
 
 
 def draw():
     global ry
+    directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     background(0.0)
 
     translate(0, -100, -200)

crates/processing_pyo3/examples/Basics/Transform/rotate_push_pop.py

@@ -14,12 +14,12 @@ def setup():
     size(640, 360)
     mode_3d()
     no_stroke()
-    directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     roughness(0.6)
 
 
 def draw():
     global a
+    directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     background(0.0, 0.0, 0.1)
 
     for i in range(num):

crates/processing_pyo3/examples/Demos/Graphics/patch.py

@@ -21,13 +21,13 @@
 def setup():
     size(1024, 768)
     mode_3d()
-    # lights()
-    directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     roughness(0.6)
     build()
 
 
 def draw():
+    # lights()
+    directional_light((1.0, 1.0, 1.0), 4000.0, position=(0, 0, 1), look_at=(0, 0, 0))
     background(1.0)
     scale(0.9)
     rotate_y(remap(mouse_x, 0, width, -PI, PI))