convert -resize 96x96 art/icon.png res/drawable-xhdpi/icon.png
convert -resize 144x144 art/icon.png res/drawable-xxhdpi/icon.png
convert -resize 192x192 art/icon.png res/drawable-xxxhdpi/icon.png
+
+bin/model_viewer_vr.apk: $(shell ${NITLS} -M src/model_viewer.nit android) ${NITC} res/drawable-hdpi/icon.png libs/cardboard.jar
+ ${NITC} src/model_viewer.nit -m android -m ../../lib/gamnit/depth/vr.nit -o $@
+
+libs/cardboard.jar:
+ curl --progress-bar -o libs/cardboard.jar \
+ https://raw.githubusercontent.com/googlesamples/cardboard-java/master/CardboardSample/libs/cardboard.jar
Sample portable 3D app implemented with the gamnit depth framework
+This application uses the _depth_ framework to load and display 3D models.
+It also applies the _flat_ framework to display the static UI elements (like the "Next model" label).
+
+The pretty earth model (`GlobeModel`) is implemented by a material with a custom graphical program.
+It renders the earth with an displaced surface, a cloud layer, city lights and Phong lighting effects on the water.
+
+# Variations
+
+* The standard application is compiled to a desktop executable at `bin/model_viewer` and an Android package at `bin/model_viewer.apk`.
+* The virtual reality variant `bin/model_viewer_vr.apk` targets Android and uses Google Cardboard for head tracking.
+
# Art
* 3D models `Tree_01` and `Oak_Fall_01` were created by Kenney.nl and published under CC0.
* 3D model `Quandtum_BA-2_v1_1` was created by Quandtum and published under CC0.
* Some textures on the `Quandtum_BA-2_v1_1` model have been created with images from goodtextures.com.
These images can be used in free softwares, some restrictions still applies for modifications and other uses.
+* Globe textures credit: NASA, Visible Earth
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--- /dev/null
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Intro a custom model, material and graphics program to draw a globe
+module globe
+
+intrude import gamnit::depth # To access `Mesh::indices_c`
+
+# Number of vertices to create parallels, meridians are double of this
+#
+# The minimum should be 3 for an octahedron planet.
+fun n_parallels: Int do return 25
+
+redef class App
+
+ # Program for the graphic card
+ private var globe_program = new GlobeProgram
+
+ # Texture of the reflexive surface of the earth (with the seas in white)
+ private var texture_seas = new Texture("globe/seas.jpg")
+
+ # Texture of the surface of the earth
+ private var texture_earth = new Texture("globe/earth.jpg")
+
+ # Texture of the lights at night on earth
+ private var texture_night = new Texture("globe/lights.jpg")
+
+ # Elevation map of earth
+ private var texture_elevation = new Texture("globe/elevation.jpg")
+
+ # Texture of the clouds above the earth
+ private var texture_clouds = new Texture("globe/clouds.png")
+
+ redef fun on_create
+ do
+ super
+
+ # Compile globe_program
+ var program = app.globe_program
+ program.compile_and_link
+
+ # Catch any errors
+ var gamnit_error = program.error
+ assert gamnit_error == null else print_error gamnit_error
+ end
+end
+
+# Full model of a globe, with a surface, clouds layer and atmosphere
+class GlobeModel
+ super CompositeModel
+
+ redef fun load
+ do
+ leaves.add new LeafModel(
+ new Mesh.uv_sphere(1.0, 2*n_parallels, n_parallels),
+ new GlobeMaterial.surface)
+ leaves.add new LeafModel(
+ new Mesh.uv_sphere(1.1, 2*n_parallels, n_parallels),
+ new GlobeMaterial.clouds)
+ leaves.add new LeafModel(
+ new Mesh.uv_sphere(1.2, 2*n_parallels, n_parallels),
+ new GlobeMaterial.atmo)
+ end
+end
+
+# Parameterizable material to draw the 3 layers of the globe
+class GlobeMaterial
+ super Material
+
+ # Id of the texture for diffuse colors, if any
+ var texture_id: nullable Int
+
+ # Draw as a surface, using the elevation map and the night lights
+ var is_surface: Bool
+
+ # Ambient color
+ var color: Array[Float]
+
+ # Create and configure a material for the earth surface
+ init surface do init(0, true, [1.0, 1.0, 1.0, 1.0])
+
+ # Create and configure a material for the cloud layer
+ init clouds do init(4, false, [1.0, 1.0, 1.0, 0.25])
+
+ # Create and configure a material for the visible atmosphere
+ init atmo do init(null, false, [0.0, 0.8, 1.0, 0.05])
+
+ redef fun draw(actor, model)
+ do
+ var gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print gl_error
+
+ var mesh = model.mesh
+
+ var program = app.globe_program
+ program.use
+
+ # Set constant program values
+ program.use
+
+ # Bind textures
+ glActiveTexture gl_TEXTURE0
+ glBindTexture(gl_TEXTURE_2D, app.texture_earth.gl_texture)
+
+ glActiveTexture gl_TEXTURE1
+ glBindTexture(gl_TEXTURE_2D, app.texture_seas.gl_texture)
+
+ glActiveTexture gl_TEXTURE2
+ glBindTexture(gl_TEXTURE_2D, app.texture_night.gl_texture)
+
+ glActiveTexture gl_TEXTURE3
+ glBindTexture(gl_TEXTURE_2D, app.texture_elevation.gl_texture)
+
+ glActiveTexture gl_TEXTURE4
+ glBindTexture(gl_TEXTURE_2D, app.texture_clouds.gl_texture)
+
+ # Set samplers
+ program.tex_specular.uniform 1
+ program.tex_night.uniform 2
+ program.tex_displace.uniform 3
+
+ # Update camera view and light
+ var p = app.world_camera.position
+ program.camera.uniform(p.x, p.y, p.z)
+ program.mvp.uniform app.world_camera.mvp_matrix
+ program.light_center.uniform(app.light.position.x, app.light.position.y, app.light.position.z)
+
+ # Set attributes
+ program.coord.array_enabled = true
+ program.coord.array(mesh.vertices, 3)
+
+ program.tex_coord.array_enabled = true
+ program.tex_coord.array(mesh.texture_coords, 2)
+
+ program.normal.array_enabled = true
+ program.normal.array(mesh.normals, 3)
+
+ # Set uniforms
+ program.scale.uniform 1.0
+ program.rotation.uniform new Matrix.rotation(actor.rotation, 0.0, 1.0, 0.0)
+ program.translation.uniform(actor.center.x, -actor.center.y, actor.center.z, 0.0)
+ program.color.uniform(color[0], color[1], color[2], color[3])
+ program.is_surface.uniform is_surface
+
+ # Set the color texture?
+ var tex = texture_id
+ if tex == null then
+ program.use_texture.uniform false
+ else
+ program.use_texture.uniform true
+ program.tex.uniform tex
+ end
+
+ # Execute draw, support only meshes with `indices`
+ glDrawElements(gl_TRIANGLES, mesh.indices.length, gl_UNSIGNED_SHORT, mesh.indices_c.native_array)
+
+ # Catch any errors
+ gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print gl_error
+ end
+end
+
+# Graphical program to draw a planet with Phong lighting
+class GlobeProgram
+ super GamnitProgramFromSource
+
+ redef var vertex_shader_source = """
+ // Vertex coordinates
+ attribute vec4 coord;
+
+ // Vertex color tint
+ uniform vec4 color;
+
+ // Vertex translation
+ uniform vec4 translation;
+
+ // Vertex scaling
+ uniform float scale;
+
+ // Vertex coordinates on textures
+ attribute vec2 tex_coord;
+
+ // Vertex normal
+ attribute vec3 normal;
+
+ // Model view projection matrix
+ uniform mat4 mvp;
+
+ // Model rotation
+ uniform mat4 rotation;
+
+ // Lights config
+ uniform vec3 light_center;
+
+ // Texture of surface elevation to displace vertices
+ uniform sampler2D tex_displace;
+
+ // Draw this as a planet surface?
+ uniform bool is_surface;
+
+ // Output for the fragment shader
+ varying vec4 v_color;
+ varying vec2 v_tex_coord;
+ varying vec3 v_normal;
+ varying vec4 v_light_center;
+
+ void main()
+ {
+ v_color = color;
+ v_tex_coord = tex_coord;
+ v_normal = normalize(vec4(normal, 0.0) * rotation * mvp).xyz;
+ v_light_center = vec4(light_center, 0.0) * mvp;
+
+ // Apply displacement map
+ float s = scale;
+ if (is_surface)
+ s += 0.05 * texture2D(tex_displace, tex_coord).r;
+
+ gl_Position = (vec4(coord.xyz * s, 1.0) * rotation + translation) * mvp;
+
+ }
+ """ @ glsl_vertex_shader
+
+ redef var fragment_shader_source = """
+ precision mediump float;
+
+ // Input from the vertex shader
+ varying vec4 v_color;
+ varying vec2 v_tex_coord;
+ varying vec3 v_normal;
+ varying vec4 v_light_center;
+
+ // Coordinates of the camera
+ uniform vec3 camera;
+
+ // Does this object use a texture?
+ uniform bool use_texture;
+
+ // Texture to apply on this object
+ uniform sampler2D tex;
+
+ // Reflection map to apply to the Phong logic
+ uniform sampler2D tex_specular;
+
+ // Texture for the dark side of the earth
+ uniform sampler2D tex_night;
+
+ // Draw this as a planet surface?
+ uniform bool is_surface;
+
+ // Colors config
+ vec4 ambient_color = vec4(0.2, 0.2, 0.2, 1.0);
+ vec4 diffuse_color = vec4(1.0, 1.0, 1.0, 1.0);
+ vec4 specular_color = vec4(1.0, 1.0, 1.0, 1.0);
+
+ void main()
+ {
+ // Lambert diffusion
+ vec3 to_light = normalize(v_light_center.xyz);
+ float lambert = max(dot(to_light, v_normal), 0.0);
+
+ // Phong specular
+ float specular = 0.0;
+ if (lambert > 0.0) {
+ vec3 to_camera = normalize(camera);
+ vec3 normal = normalize(v_normal);
+ vec3 light_reflect = reflect(to_light, normal);
+ float spec_angle = max(dot(light_reflect, to_camera), 0.0);
+ specular = pow(spec_angle, 16.0);
+
+ if (is_surface)
+ specular *= texture2D(tex_specular, v_tex_coord).x;
+ else specular *= 0.2;
+ }
+
+ if(use_texture) {
+ gl_FragColor = v_color * texture2D(tex, v_tex_coord);
+ } else {
+ gl_FragColor = v_color;
+ }
+
+ gl_FragColor *= ambient_color + lambert * diffuse_color;
+ gl_FragColor += specular * specular_color;
+
+ if (is_surface && lambert < 0.2) {
+ // Show city lights at night
+ float p_night = (0.2 - lambert) * 5.0;
+ gl_FragColor += p_night*texture2D(tex_night, v_tex_coord);
+ }
+ }
+ """ @ glsl_fragment_shader
+
+ # Vertices coordinates
+ var coord = attributes["coord"].as(AttributeVec4) is lazy
+
+ # Color tint per vertex
+ var color = uniforms["color"].as(UniformVec4) is lazy
+
+ # Scaling per vertex
+ var scale = uniforms["scale"].as(UniformFloat) is lazy
+
+ # Coordinates on the textures, per vertex
+ var tex_coord = attributes["tex_coord"].as(AttributeVec2) is lazy
+
+ # Normal per vertex
+ var normal = attributes["normal"].as(AttributeVec3) is lazy
+
+ # Model view projection matrix
+ var mvp = uniforms["mvp"].as(UniformMat4) is lazy
+
+ # Should this program use the texture `tex`?
+ var use_texture = uniforms["use_texture"].as(UniformBool) is lazy
+
+ # Main visible texture unit
+ var tex = uniforms["tex"].as(UniformSampler2D) is lazy
+
+ # Texture unit for reflection effect
+ var tex_specular = uniforms["tex_specular"].as(UniformSampler2D) is lazy
+
+ # Texture of the earth at night
+ var tex_night = uniforms["tex_night"].as(UniformSampler2D) is lazy
+
+ # Texture with elevation data
+ var tex_displace = uniforms["tex_displace"].as(UniformSampler2D) is lazy
+
+ # Position of the camera
+ var camera = uniforms["camera"].as(UniformVec3) is lazy
+
+ # Execute this program to draw a planet surface?
+ var is_surface = uniforms["is_surface"].as(UniformBool) is lazy
+
+ # Translation applied to each vertex
+ var translation = uniforms["translation"].as(UniformVec4) is lazy
+
+ # Rotation matrix
+ var rotation = uniforms["rotation"].as(UniformMat4) is lazy
+
+ # Center position of the light
+ var light_center = uniforms["light_center"].as(UniformVec3) is lazy
+end
import gamnit::depth
+import globe
+
redef class App
# All available models
new LeafModel(new Mesh.uv_sphere(4.0, 32, 16), new NormalsMaterial),
new Model("models/Tree_01.obj"),
new Model("models/Oak_Fall_01.obj"),
- new Model("models/Quandtum_BA-2_v1_1.obj")]
+ new Model("models/Quandtum_BA-2_v1_1.obj"),
+ new GlobeModel]
# Index of the current model in `models`
var model_index = 0
actor.center.z -= model.mesh.center.z
var height = model.mesh.dimensions.y
- world_camera.reset_height(height * 4.0)
+ world_camera.reset_height(height * 3.0)
actors.clear
actors.add actor
# Stop tracking head movement
fun stop_tracking in "Java" `{ self.stopTracking(); `}
- # Apply correction to the gyroscope values
- fun gyro_bias=(matrix: JavaFloatArray) in "Java" `{
- self.setGyroBias(matrix);
- `}
-
# Enable finer analysis using the neck as center of movement
fun neck_model_enabled=(value: Bool) in "Java" `{
self.setNeckModelEnabled(value);
--- /dev/null
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Update the orientation of `world_camera` at each frame using the head position given by `android::cardboard`
+#
+# This module is Android specific.
+module cardboard
+
+import ::android::cardboard
+
+import depth
+intrude import cameras
+
+redef class EulerCamera
+ # Do not use `yaw` and `pitch`, the value will instead originate from the Cardboard API
+ redef var rotation_matrix = new Matrix.identity(4)
+
+ # Get the angle value from the `rotation_matrix`
+ redef fun pitch
+ do
+ var a = rotation_matrix[0, 1]
+ var b = rotation_matrix[1, 1]
+ return -atan2(a, b)
+ end
+
+ # Get the angle value from the `rotation_matrix`
+ redef fun yaw
+ do
+ var a = rotation_matrix[2, 0]
+ var b = rotation_matrix[2, 2]
+ return -atan2(a, b)
+ end
+end
+
+redef class App
+
+ # Cardboard's head tacker instance
+ private var head_tracker: nullable NativeHeadTracker = null
+
+ # Rotation matrix read from `head_tracker`, reusing the same structure as a buffer
+ private var java_rotation_matrix = new JavaFloatArray(16) is lazy
+
+ # Initialize and set `head_tracker`
+ fun initialize_head_tracker
+ do
+ # Initialize the Cardboard head orientation tracker service
+ var head_tracker = new NativeHeadTracker(app.native_activity)
+ head_tracker.neck_model_enabled = true
+ head_tracker.start_tracking
+ self.head_tracker = head_tracker
+
+ # Set a wide field of view
+ world_camera.field_of_view_y = 1.0
+ end
+
+ # Read the rotation matrix from Cardboard and update `world_camera`
+ private fun update_from_head_tracker
+ do
+ var head_tracker = head_tracker
+ if head_tracker == null then return
+
+ head_tracker.last_head_view(java_rotation_matrix, 0)
+
+ # Copy values from the Java array to our matrix
+ for y in [0..4[ do
+ for x in [0..4[ do
+ world_camera.rotation_matrix[y, x] = java_rotation_matrix[y*4+x]
+ end
+ end
+ end
+
+ redef fun on_create
+ do
+ super
+ initialize_head_tracker
+ end
+
+ redef fun update(dt)
+ do
+ super
+ update_from_head_tracker
+ end
+
+ redef fun pause
+ do
+ super
+ var tracker = head_tracker
+ if tracker != null then tracker.stop_tracking
+ end
+
+ redef fun resume
+ do
+ super
+ var tracker = head_tracker
+ if tracker != null then tracker.start_tracking
+ end
+end
assert gamnit_error == null else print_error gamnit_error
end
- # Draw all element in `actors`
- redef fun frame_core_draw(display)
- do
- super
+ redef fun frame_core_draw(display) do frame_core_depth display
+ # Draw all elements of `actors` and then call `frame_core_flat`
+ protected fun frame_core_depth(display: GamnitDisplay)
+ do
# Update cameras on both our programs
versatile_program.use
versatile_program.mvp.uniform world_camera.mvp_matrix
leaf.material.draw(actor, leaf)
end
end
+
+ frame_core_flat display
end
end
attribute vec4 coord;
// Vertex translation
- attribute vec4 translation;
+ uniform vec4 translation;
// Vertex scaling
- attribute float scale;
+ uniform float scale;
// Vertex coordinates on textures
attribute vec2 tex_coord;
var camera = uniforms["camera"].as(UniformVec3) is lazy
# Translation applied to each vertex
- var translation = attributes["translation"].as(AttributeVec4) is lazy
+ var translation = uniforms["translation"].as(UniformVec4) is lazy
# Rotation matrix
var rotation = uniforms["rotation"].as(UniformMat4) is lazy
# Scaling per vertex
- var scale = attributes["scale"].as(AttributeFloat) is lazy
+ var scale = uniforms["scale"].as(UniformFloat) is lazy
# Model view projection matrix
var mvp = uniforms["mvp"].as(UniformMat4) is lazy
end
redef var center = new Point3d[Float](0.0, 0.0, 0.0) is lazy
+
+ init do indices.add_all([0, 1, 2, 2, 1, 3])
+ # TODO use gl_TRIANGLE_FAN instead
end
# Cube, with 6 faces
return normals
end
+ redef var texture_coords: Array[Float] is lazy do
+ var a = [0.0, 1.0]
+ var b = [1.0, 1.0]
+ var c = [0.0, 0.0]
+ var d = [1.0, 0.0]
+
+ var texture_coords = new Array[Float]
+ for v in [c, d, a, a, d, b] do for i in 6.times do texture_coords.add_all v
+ return texture_coords
+ end
+
redef var center = new Point3d[Float](0.0, 0.0, 0.0) is lazy
end
--- /dev/null
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Refine `EulerCamera` and `App::frame_core_draw` to get a stereoscopic view
+module stereoscopic_view
+
+import depth
+intrude import cameras
+
+redef class EulerCamera
+ redef var mvp_matrix = new Matrix.identity(4)
+
+ # Half of the distance between the eyes
+ var eye_separation: Float = 0.03125
+
+ # MVP matrix for the left eye
+ fun mvp_matrix_left: Matrix do return mvp_matrix_eye(eye_separation)
+
+ # MVP matrix for the right eye
+ fun mvp_matrix_right: Matrix do return mvp_matrix_eye(-eye_separation)
+
+ # Get an MVP matrix for an eye at `diff` world unit from the center
+ private fun mvp_matrix_eye(diff: Float): Matrix
+ do
+ var view = new Matrix.identity(4)
+
+ # Translate the world away from the camera
+ view.translate(-position.x/2.0, -position.y/2.0, -position.z/2.0)
+
+ # Rotate the camera, first by looking left or right, then up or down
+ view = view * rotation_matrix
+
+ # Apply eye transformation
+ var translation = new Matrix.identity(4)
+ translation.translate(diff, 0.0, 0.0)
+ view = view * translation
+
+ # Use a projection matrix with a depth
+ var projection = new Matrix.perspective(pi*field_of_view_y/2.0,
+ display.aspect_ratio, near, far)
+
+ return view * projection
+ end
+end
+
+redef class GamnitDisplay
+
+ # With stereoscopic view, the aspect ratio (in each eye) is half of the screen
+ redef fun aspect_ratio do return super / 2.0
+end
+
+redef class App
+ redef fun frame_core_draw(display) do frame_core_stereoscopic display
+
+ # Split the screen in two, and call `frame_core_depth` for each eyes
+ protected fun frame_core_stereoscopic(display: GamnitDisplay)
+ do
+ var half_width = display.width / 2
+
+ # Left eye
+ glViewport(0, 0, half_width, display.height)
+ world_camera.mvp_matrix = world_camera.mvp_matrix_left
+ frame_core_depth display
+
+ # Right eye
+ glViewport(half_width, 0, half_width, display.height)
+ world_camera.mvp_matrix = world_camera.mvp_matrix_right
+ frame_core_depth display
+
+ # We reset the viewport for selection
+ glViewport(0, 0, display.width, display.height)
+
+ # Check for errors
+ var gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print gl_error
+ end
+end
--- /dev/null
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# VR support for gamnit depth, for Android only
+module vr
+
+import cardboard
+import stereoscopic_view
+++ /dev/null
-NITC=../../../../bin/nitc
-NITLS=../../../../bin/nitls
-
-all: bin/globe
-
-bin/globe: $(shell ${NITLS} -M src/globe.nit linux) ${NITC}
- ${NITC} src/globe.nit -m linux -o $@ -D n_parallels=100
-
-check: bin/globe
- bin/globe
-
-# ---
-# Android
-
-android: bin/globe.apk
-bin/globe.apk: $(shell ${NITLS} -M src/globe.nit android) ${NITC} res/drawable-hdpi/icon.png assets/ld/earth.jpg
- ${NITC} src/globe.nit -m android -o $@
-
-android-release: $(shell ${NITLS} -M src/globe.nit android) ${NITC} res/drawable-hdpi/icon.png assets/ld/earth.jpg
- ${NITC} src/globe.nit -m android -o bin/globe.apk --release
-
-android-wear: $(shell ${NITLS} -M src/globe.nit android) ${NITC} res/drawable-hdpi/icon.png assets/ld/earth.jpg
- ${NITC} src/globe.nit -m android -o bin/planet_wear.apk -D n_parallels=10
-
-res/drawable-hdpi/icon.png: art/icon.png
- mkdir -p res/drawable-ldpi/ res/drawable-mdpi/ res/drawable-hdpi/ \
- res/drawable-xhdpi/ res/drawable-xxhdpi/ res/drawable-xxxhdpi/
- convert -resize 36x36 art/icon.png res/drawable-ldpi/icon.png
- convert -resize 48x48 art/icon.png res/drawable-mdpi/icon.png
- convert -resize 72x72 art/icon.png res/drawable-hdpi/icon.png
- convert -resize 96x96 art/icon.png res/drawable-xhdpi/icon.png
- convert -resize 144x144 art/icon.png res/drawable-xxhdpi/icon.png
- convert -resize 192x192 art/icon.png res/drawable-xxxhdpi/icon.png
-
-assets/ld/earth.jpg:
- mkdir -p assets/ld
- convert -resize 2048x1024 assets/hd/earth.jpg assets/ld/earth.jpg
- convert -resize 2048x1024 assets/hd/seas.jpg assets/ld/seas.jpg
- convert -resize 2048x1024 assets/hd/clouds.png assets/ld/clouds.png
- convert -resize 2048x1024 assets/hd/elevation.jpg assets/ld/elevation.jpg
- convert -resize 2048x1024 assets/hd/lights.jpg assets/ld/lights.jpg
+++ /dev/null
-Sample gamnit app rendering the earth with elevated surface, cloud layer, city lights and Phong lighting.
-
-# Possible variations
-
-It would have been possible to achieve the same result with different approaches.
-They should be explored as they could provide better performances or be easier to understand.
-
-* Use a single set of vertices, normals and indices because we only need spheres.
-* Alternatively, use one program per sphere.
-
-# Art
-
-Images credit: NASA, Visible Earth
+++ /dev/null
-Categories:Nit,Multimedia
-License:Apache2
-Web Site:http://nitlanguage.org
-Source Code:http://nitlanguage.org/nit.git/tree/HEAD:/lib/gamnit/examples/globe
-Issue Tracker:https://github.com/nitlang/nit/issues
-
-Summary:Simple rotating globe of the earth
-Description:
-Non-interactive sample gamnit app rendering the earth with elevated surface, cloud layer, city lights and Phong lighting.
-.
+++ /dev/null
-[package]
-name=globe
-tags=example
-maintainer=Alexis Laferrière <alexis.laf@xymus.net>
-license=Apache-2.0
-[upstream]
-browse=https://github.com/nitlang/nit/tree/master/lib/gamnit/examples/globe/
-git=https://github.com/nitlang/nit.git
-git.directory=lib/gamnit/examples/globe/
-homepage=http://nitlanguage.org
-issues=https://github.com/nitlang/nit/issues
-apk=http://nitlanguage.org/fdroid/apk/globe.apk
+++ /dev/null
-# This file is part of NIT ( http://www.nitlanguage.org ).
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Portable app using gamnit textures and programs with custom calls to OpenGL ES 2.0
-module globe is
- app_name "gamnit Globe"
- app_namespace "org.nitlanguage.globe"
- app_version(1, 0, git_revision)
-
- android_manifest_activity """android:screenOrientation="portrait""""
- android_api_target 15
-end
-
-import realtime
-import matrix::projection
-
-import gamnit
-import gamnit::cameras
-import gamnit::limit_fps
-
-private import more_collections
-
-# Graphical program to draw a planet with Phong lighting
-class GlobeProgram
- super GamnitProgramFromSource
-
- redef var vertex_shader_source = """
- // Vertex coordinates
- attribute vec4 coord;
-
- // Vertex color tint
- attribute vec4 color;
-
- // Vertex translation
- attribute vec4 translation;
-
- // Vertex scaling
- attribute float scale;
-
- // Vertex coordinates on textures
- attribute vec2 tex_coord;
-
- // Vertex normal
- attribute vec3 normal;
-
- // Model view projection matrix
- uniform mat4 mvp;
-
- // Texture of surface elevation to displace vertices
- uniform sampler2D tex_displace;
-
- // Draw this as a planet surface?
- uniform bool is_surface;
-
- // Output for the fragment shader
- varying vec4 v_color;
- varying vec2 v_tex_coord;
- varying vec3 v_normal;
-
- void main()
- {
- // Pass varyings to the fragment shader
- v_color = color;
- v_tex_coord = tex_coord;
- v_normal = normal;
-
- // Apply bump map
- float s = scale;
- if (is_surface)
- s += 0.05 * texture2D(tex_displace, tex_coord).r;
-
- gl_Position = (vec4(coord.xyz * s, 1.0) + translation) * mvp;
- }
- """ @ glsl_vertex_shader
-
- redef var fragment_shader_source = """
- precision mediump float;
-
- // Input from the vertex shader
- varying vec4 v_color;
- varying vec2 v_tex_coord;
- varying vec3 v_normal;
-
- // Coordinates of the camera
- uniform vec3 camera;
-
- // Does this object use a texture?
- uniform bool use_texture;
-
- // Texture to apply on this object
- uniform sampler2D tex;
-
- // Reflection map to apply the the phong logic
- uniform sampler2D tex_shiny;
-
- // Texture for the dark side of the earth
- uniform sampler2D tex_night;
-
- // Draw this as a planet surface?
- uniform bool is_surface;
-
- // Lights config
- // TODO configure from outside the shader
- vec3 light_dir = normalize(vec3(-1.0, 0.0, -1.0));
- vec4 ambient_color = vec4(0.2, 0.2, 0.2, 1.0);
- vec4 diffuse_color = vec4(1.0, 1.0, 1.0, 1.0);
- vec4 specular_color = vec4(1.0, 1.0, 1.0, 1.0);
-
- void main()
- {
- if(use_texture) {
- gl_FragColor = v_color * texture2D(tex, v_tex_coord);
- } else {
- gl_FragColor = v_color;
- }
-
- // Lambert diffusion
- float lambert = max(dot(light_dir, v_normal), 0.0);
-
- // Phong specular
- float specular = 0.0;
- if (lambert > 0.0) {
- vec3 to_camera = normalize(camera);
- vec3 light_reflect = reflect(light_dir, v_normal);
- float specularAngle = max(dot(light_reflect, to_camera), 0.0);
- specular = pow(specularAngle, 16.0);
-
- if (is_surface)
- specular *= texture2D(tex_shiny, v_tex_coord).x;
- else specular *= 0.2;
- }
-
- gl_FragColor *= ambient_color + lambert * diffuse_color;
- gl_FragColor += specular * specular_color;
-
- if (is_surface && lambert < 0.2) {
- // Show city lights at night
- float p_night = (0.2 - lambert) * 5.0;
- gl_FragColor += p_night*texture2D(tex_night, v_tex_coord);
- }
- }
- """ @ glsl_fragment_shader
-
- # Vertices coordinates
- var coord = attributes["coord"].as(AttributeVec4) is lazy
-
- # Color tint per vertex
- var color = attributes["color"].as(AttributeVec4) is lazy
-
- # Scaling per vertex
- var scale = attributes["scale"].as(AttributeFloat) is lazy
-
- # Coordinates on the textures, per vertex
- var tex_coord = attributes["tex_coord"].as(AttributeVec2) is lazy
-
- # Normal per vertex
- var normal = attributes["normal"].as(AttributeVec3) is lazy
-
- # Model view projection matrix
- var mvp = uniforms["mvp"].as(UniformMat4) is lazy
-
- # Should this program use the texture `tex`?
- var use_texture = uniforms["use_texture"].as(UniformBool) is lazy
-
- # Main visible texture unit
- var tex = uniforms["tex"].as(UniformSampler2D) is lazy
-
- # Texture unit for reflection effect
- var tex_shiny = uniforms["tex_shiny"].as(UniformSampler2D) is lazy
-
- # Texture of the earth at night
- var tex_night = uniforms["tex_night"].as(UniformSampler2D) is lazy
-
- # Texture with elevation data
- var tex_displace = uniforms["tex_displace"].as(UniformSampler2D) is lazy
-
- # Position of the camera
- var camera = uniforms["camera"].as(UniformVec3) is lazy
-
- # Execute this program to draw a planet surface?
- var is_surface = uniforms["is_surface"].as(UniformBool) is lazy
-end
-
-# Mesh with all information for drawing
-class Mesh
-
- # Vertices coordinates
- var vertices: Array[Float]
-
- # Indices to draw triangles
- var indices: Array[Int]
-
- private var indices_c = new CUInt16Array.from(indices) is lazy
-
- # Normals on each vertex
- var normals: Array[Float]
-
- # Coordinates on the texture per vertex
- var texture_coords: Array[Float]
-
- # Create an UV sphere of `radius` with `n_meridians` and `n_parallels`
- init uv_sphere(radius: Float, n_meridians, n_parallels: Int)
- do
- var w = n_meridians
- var h = n_parallels
-
- var vertices = new Array[Float].with_capacity(w*h*3)
- var texture_coords = new Array[Float].with_capacity(w*h*2)
- var normals = new Array[Float].with_capacity(w*h*3)
-
- # Build vertices
- for m in [0..w[ do
- for p in [0..h[ do
- var u = m.to_f * 2.0 * pi / (w-1).to_f
- var v = p.to_f * pi / (h-1).to_f
-
- vertices.add radius * u.cos * v.sin
- vertices.add radius * v.cos
- vertices.add radius * u.sin * v.sin
-
- texture_coords.add (1.0 - m.to_f/(w-1).to_f)
- texture_coords.add(p.to_f/(h-1).to_f)
-
- normals.add u.cos * v.sin
- normals.add v.cos
- normals.add u.sin * v.sin
- end
- end
-
- # Build faces
- var indices = new Array[Int].with_capacity((w-1)*(h-1)*6)
- for m in [0..w-1[ do
- for p in [0..h-1[ do
- var a = m*h + p
-
- indices.add a
- indices.add(a+h)
- indices.add(a+1)
-
- indices.add(a+h)
- indices.add(a+h+1)
- indices.add(a+1)
- end
- end
-
- init(vertices, indices, normals, texture_coords)
- end
-end
-
-# Number of vertices to create parallels, meridians are double of this
-#
-# The minimum should be 3 for an octahedron planet.
-fun n_parallels: Int do return 25
-
-redef class GamnitAssetTexture
- # All images are either within the hd or ld folder
- redef fun path do return app.definition / super
-end
-
-redef class App
-
- # Earth
- var planet = new Mesh.uv_sphere(2.0, 2*n_parallels, n_parallels)
-
- # Cloud layer
- var clouds = new Mesh.uv_sphere(2.08, 2*n_parallels, n_parallels)
-
- # Visible atmosphere
- var atmo = new Mesh.uv_sphere(2.16, 2*n_parallels, n_parallels)
-
- # Program for the graphic card
- var program = new GlobeProgram
-
- private var definition: String is lazy do
- var max_texture_size = glGetIntegerv(gl_MAX_TEXTURE_SIZE)
-
- # HD textures max sizes reange from 2048 px to 5400 px
- if max_texture_size < 5400 then
- return "ld"
- else return "hd"
- end
-
- # Texture of the reflexive surface of the earth (with the seas in white)
- var texture_seas = new Texture("seas.jpg")
-
- # Texture of the surface of the earth
- var texture_earth = new Texture("earth.jpg")
-
- # Texture of the lights at night on earth
- var texture_night = new Texture("lights.jpg")
-
- # Elevation map of earth
- var texture_elevation = new Texture("elevation.jpg")
-
- # Texture of the clouds above the earth
- var texture_clouds = new Texture("clouds.png")
-
- # Camera for the only view
- var camera: EulerCamera is lazy do
- var camera = new EulerCamera(app.display.as(not null))
- camera.move(0.0, 0.1, -5.0)
- return camera
- end
-
- redef fun on_create
- do
- super
-
- var display = display
- assert display != null
-
- var gl_error = glGetError
- assert gl_error == gl_NO_ERROR else print gl_error
-
- # Prepare program
- var program = program
- program.compile_and_link
-
- var gamnit_error = program.error
- assert gamnit_error == null else print_error gamnit_error
-
- # Blend
- gl.capabilities.blend.enable
- glBlendFunc(gl_SRC_ALPHA, gl_ONE_MINUS_SRC_ALPHA)
-
- gl.capabilities.depth_test.enable
- glDepthFunc gl_LEQUAL
- glDepthMask true
-
- gl_error = glGetError
- assert gl_error == gl_NO_ERROR else print gl_error
-
- # Prepare to draw
- for tex in all_root_textures do
- tex.load
- glTexParameteri(gl_TEXTURE_2D, gl_TEXTURE_MIN_FILTER, gl_LINEAR)
- glTexParameteri(gl_TEXTURE_2D, gl_TEXTURE_MAG_FILTER, gl_LINEAR)
-
- gamnit_error = tex.error
- assert gamnit_error == null else print_error gamnit_error
- end
-
- gl_error = glGetError
- assert gl_error == gl_NO_ERROR else print gl_error
-
- program.use
-
- glViewport(0, 0, display.width, display.height)
- glClearColor(0.0, 0.02, 0.0, 1.0)
-
- gl_error = glGetError
- assert gl_error == gl_NO_ERROR else print gl_error
-
- # Assign all textures to a unit
- glActiveTexture gl_TEXTURE0
- glBindTexture(gl_TEXTURE_2D, texture_earth.gl_texture)
-
- glActiveTexture gl_TEXTURE1
- glBindTexture(gl_TEXTURE_2D, texture_seas.gl_texture)
-
- glActiveTexture gl_TEXTURE2
- glBindTexture(gl_TEXTURE_2D, texture_night.gl_texture)
-
- glActiveTexture gl_TEXTURE3
- glBindTexture(gl_TEXTURE_2D, texture_elevation.gl_texture)
-
- glActiveTexture gl_TEXTURE4
- glBindTexture(gl_TEXTURE_2D, texture_clouds.gl_texture)
-
- gl_error = glGetError
- assert gl_error == gl_NO_ERROR else print gl_error
-
- # Constant program values
- program.coord.array_enabled = true
- program.tex_coord.array_enabled = true
- program.normal.array_enabled = true
-
- program.scale.uniform 1.0
-
- program.use_texture.uniform true
-
- program.tex_shiny.uniform 1
- program.tex_night.uniform 2
- program.tex_displace.uniform 3
-
- gl_error = glGetError
- assert gl_error == gl_NO_ERROR else print gl_error
- end
-
- private var clock = new Clock
-
- redef fun frame_core(display)
- do
- var t = clock.total.to_f/3.0 + 0.75*pi
-
- var gl_error = glGetError
- assert gl_error == gl_NO_ERROR else print gl_error
-
- glClear(gl_COLOR_BUFFER_BIT | gl_DEPTH_BUFFER_BIT)
- program.use
-
- # Rotate world
- # FIXME do this cleanly by moving the camera
- var mvp = new Matrix.rotation(t, 0.0, 1.0, 0.0) * camera.mvp_matrix
- program.mvp.uniform mvp
- program.camera.uniform(-t.sin, -0.8, -t.cos)
-
- # Planet
- program.coord.array(planet.vertices, 3)
- program.tex_coord.array(planet.texture_coords, 2)
- program.normal.array(planet.normals, 3)
- program.tex.uniform 0
- program.use_texture.uniform true
- program.color.uniform(1.0, 1.0, 1.0, 1.0)
- program.is_surface.uniform true
- glDrawElements(gl_TRIANGLES, planet.indices.length, gl_UNSIGNED_SHORT, planet.indices_c.native_array)
-
- # Clouds
- program.coord.array(clouds.vertices, 3)
- program.tex_coord.array(clouds.texture_coords, 2)
- program.normal.array(clouds.normals, 3)
- program.tex.uniform 4
- program.color.uniform(1.0, 1.0, 1.0, 0.5) # Half transparency
- program.is_surface.uniform false
- glDrawElements(gl_TRIANGLES, clouds.indices.length, gl_UNSIGNED_SHORT, clouds.indices_c.native_array)
-
- # Atmo
- program.coord.array(atmo.vertices, 3)
- program.tex_coord.array(atmo.texture_coords, 2)
- program.normal.array(atmo.normals, 3)
- program.color.uniform(0.0, 0.8, 1.0, 0.02) # Blueish
- program.is_surface.uniform false
- program.use_texture.uniform false
- glDrawElements(gl_TRIANGLES, atmo.indices.length, gl_UNSIGNED_SHORT, atmo.indices_c.native_array)
- assert program.use_texture.is_active
-
- display.flip
-
- gl_error = glGetError
- assert gl_error == gl_NO_ERROR else print gl_error
- end
-
- redef fun on_stop
- do
- # Clean up
- program.delete
-
- # Close gamnit
- var display = display
- if display != null then display.close
- end
-end
glActiveTexture gl_TEXTURE0
glBindTexture(gl_TEXTURE_2D, texture.root.gl_texture)
+ simple_2d_program.translation.array_enabled = false
+ simple_2d_program.color.array_enabled = false
+ simple_2d_program.scale.array_enabled = false
+
simple_2d_program.translation.uniform(center.x, -center.y, center.z, 0.0)
simple_2d_program.color.uniform(1.0, 1.0, 1.0, alpha)
simple_2d_program.scale.uniform scale
assert gl_error == gl_NO_ERROR else print gl_error
end
+ # Draw the whole screen, all `glDraw...` calls should be executed here
+ protected fun frame_core_draw(display: GamnitDisplay) do frame_core_flat display
+
# Draw sprites in `sprites` and `ui_sprites`
- protected fun frame_core_draw(display: GamnitDisplay)
+ protected fun frame_core_flat(display: GamnitDisplay)
do
simple_2d_program.use
--- /dev/null
+# This file is part of NIT (http://www.nitlanguage.org).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Simple service keeping track of which keys are currently pressed
+#
+# This service revolves around `app.pressed_keys`, a `Set` of the names of currently pressed keys.
+# As a `Set`, `app.pressed_keys` can be iterated and queried with `has`.
+#
+# Limitations: The keys names are platform dependent.
+module keys
+
+import mnit::input
+import gamnit
+
+redef class App
+ # Currently pressed keys
+ var pressed_keys = new Set[String] is lazy
+
+ # Register `event` to update `app.pressed_keys`
+ private fun register_key_event(event: KeyEvent)
+ do
+ var key = event.name
+ if event.is_down then
+ app.pressed_keys.add key
+ else if app.pressed_keys.has(key) then
+ app.pressed_keys.remove key
+ end
+ end
+
+ redef fun accept_event(event)
+ do
+ if event isa KeyEvent then register_key_event event
+
+ return super
+ end
+end
nitlanguage / nit.git / commitdiff
