Added uvgradient and noise examples

examples/_main/loader.go

@@ -412,3 +412,15 @@ embedded_components {
   data: "collection: \"/examples/gui/get_set_texture/get_set_texture.collection\"\n"
   ""
 }
+embedded_components {
+  id: "material/uvgradient"
+  type: "collectionproxy"
+  data: "collection: \"/examples/material/uvgradient/uvgradient.collection\"\n"
+  ""
+}
+embedded_components {
+  id: "material/noise"
+  type: "collectionproxy"
+  data: "collection: \"/examples/material/noise/noise.collection\"\n"
+  ""
+}

examples/_main/menu.gui_script

@@ -112,7 +112,7 @@ function init(self)
 		"get_set_font", "get_set_texture", "get_set_material",
 	}
 	self.index["input"] = { "move", "text", "down_duration", "mouse_and_touch" }
-	self.index["material"] = { "vertexcolor" }
+	self.index["material"] = { "vertexcolor", "uvgradient", "noise" }
 	self.index["particles"] = { "particlefx", "modifiers", "fire_and_smoke" }
 	self.index["sound"] = { "music", "fade_in_out", "panning" }
 	self.index["render"] = { "camera", "screen_to_world" }

examples/material/noise/noise.collection

@@ -0,0 +1,30 @@
+name: "noise"
+scale_along_z: 0
+embedded_instances {
+  id: "go"
+  data: "components {\n"
+  "  id: \"drawtoquad\"\n"
+  "  component: \"/examples/material/noise/noise.script\"\n"
+  "}\n"
+  "embedded_components {\n"
+  "  id: \"model\"\n"
+  "  type: \"model\"\n"
+  "  data: \"mesh: \\\"/builtins/assets/meshes/quad.dae\\\"\\n"
+  "name: \\\"{{NAME}}\\\"\\n"
+  "materials {\\n"
+  "  name: \\\"default\\\"\\n"
+  "  material: \\\"/examples/material/noise/noise.material\\\"\\n"
+  "}\\n"
+  "\"\n"
+  "}\n"
+  ""
+  position {
+    x: 360.0
+    y: 360.0
+  }
+  scale3 {
+    x: 720.0
+    y: 720.0
+    z: 50.0
+  }
+}

examples/material/noise/noise.fp

@@ -0,0 +1,47 @@
+varying mediump vec2 var_texcoord0;
+uniform lowp vec4 time;
+
+// noise shader from https://www.shadertoy.com/view/XXBcDz
+
+// pseudo random generator (white noise)
+float rand(vec2 n)
+{ 
+    return fract(sin(dot(n, vec2(12.9898, 78.233))) * 43758.5453);
+}
+
+// value noise
+float noise(vec2 p)
+{
+    vec2 ip = floor(p);
+    vec2 u = fract(p);
+    u = u * u * (3.0 - 2.0 * u);
+
+    float x = mix(rand(ip),                  rand(ip + vec2(1.0, 0.0)), u.x);
+    float y = mix(rand(ip + vec2(0.0, 1.0)), rand(ip + vec2(1.0, 1.0)), u.x);
+    float a = u.y;
+    float res = mix(x, y, a);
+    return res * res;
+}
+
+// used to rotate domain of noise function
+const mat2 rot = mat2( 0.80,  0.60, -0.60,  0.80 );
+
+// fast implementation
+float fbm( vec2 p )
+{
+    float f = 0.0;
+    f += 0.500000 * noise( p ); p = rot * p * 2.02;
+    f += 0.031250 * noise( p ); p = rot * p * 2.01;
+    f += 0.250000 * noise( p ); p = rot * p * 2.03;
+    f += 0.125000 * noise( p + 0.1 * sin(time.x) + 0.8 * time.x ); p = rot * p * 2.01;
+    f += 0.062500 * noise( p + 0.3 * sin(time.x) ); p = rot * p * 2.04;
+    f += 0.015625 * noise( p );
+    return f / 0.96875;
+}
+    
+void main()
+{  
+    float n = fbm(var_texcoord0.xy);
+    gl_FragColor = vec4(n, n, n, 1.0);
+}
+

examples/material/noise/noise.material

@@ -0,0 +1,31 @@
+name: "noise"
+tags: "model"
+vertex_program: "/examples/material/noise/noise.vp"
+fragment_program: "/examples/material/noise/noise.fp"
+vertex_space: VERTEX_SPACE_LOCAL
+vertex_constants {
+  name: "mtx_worldview"
+  type: CONSTANT_TYPE_WORLDVIEW
+}
+vertex_constants {
+  name: "mtx_view"
+  type: CONSTANT_TYPE_VIEW
+}
+vertex_constants {
+  name: "mtx_proj"
+  type: CONSTANT_TYPE_PROJECTION
+}
+vertex_constants {
+  name: "mtx_normal"
+  type: CONSTANT_TYPE_NORMAL
+}
+fragment_constants {
+  name: "time"
+  type: CONSTANT_TYPE_USER
+  value {
+    x: 1.0
+    y: 1.0
+    z: 1.0
+    w: 1.0
+  }
+}

examples/material/noise/noise.script

@@ -0,0 +1,8 @@
+function init(self)
+	self.time = 0
+end
+
+function update(self, dt)
+	self.time = self.time + dt
+	go.set("#model", "time.x", self.time)
+end

examples/material/noise/noise.vp

@@ -0,0 +1,26 @@
+
+// Positions can be world or local space, since world and normal
+// matrices are identity for world vertex space materials.
+// If world vertex space is selected, you can remove the
+// normal matrix multiplication for optimal performance.
+
+attribute highp vec4 position;
+attribute mediump vec2 texcoord0;
+attribute mediump vec3 normal;
+
+uniform mediump mat4 mtx_worldview;
+uniform mediump mat4 mtx_view;
+uniform mediump mat4 mtx_proj;
+uniform mediump mat4 mtx_normal;
+
+varying highp vec4 var_position;
+varying mediump vec3 var_normal;
+varying mediump vec2 var_texcoord0;
+
+void main()
+{
+    vec4 p = mtx_worldview * vec4(position.xyz, 1.0);
+    var_texcoord0 = texcoord0;
+    gl_Position = mtx_proj * p;
+}
+

examples/material/noise/noise_copy.fp

@@ -0,0 +1,47 @@
+varying mediump vec2 var_texcoord0;
+uniform lowp vec4 time;
+
+// noise shader from https://www.shadertoy.com/view/XXBcDz
+
+// pseudo random generator (white noise)
+float rand(vec2 n)
+{ 
+    return fract(sin(dot(n, vec2(12.9898, 4.1414))) * 43758.5453);
+}
+
+// value noise
+float noise(vec2 p)
+{
+    vec2 ip = floor(p);
+    vec2 u = fract(p);
+    u = u * u * (3.0 - 2.0 * u);
+
+    float x = mix(rand(ip), rand(ip + vec2(1.0,0.0)), u.x);
+    float y = mix(rand(ip + vec2(0.0, 1.0)), rand(ip + vec2(1.0, 1.0)), u.x);
+    float a = u.y;
+    float res = mix(x, y, a);
+    return res * res;
+}
+
+// used to rotate domain of noise function
+const mat2 rot = mat2( 0.80,  0.60, -0.60,  0.80 );
+
+// fast implementation
+float fbm( vec2 p )
+{
+    float f = 0.0;
+    f += 0.500000*noise( p ); p = rot*p*2.02;
+    f += 0.031250*noise( p ); p = rot*p*2.01;
+    f += 0.250000*noise( p ); p = rot*p*2.03;
+    f += 0.125000*noise( p + 0.1 * sin(time.x) + 0.8 * time.x ); p = rot*p*2.01;
+    f += 0.062500*noise( p + 0.3 * sin(time.x) ); p = rot*p*2.04;
+    f += 0.015625*noise( p );
+    return f / 0.96875;
+}
+    
+void main()
+{  
+    float n = fbm(var_texcoord0.xy);
+    gl_FragColor = vec4(n, n, n, 1.0);
+}
+

examples/material/uvgradient/uvgradient.collection

@@ -0,0 +1,26 @@
+name: "uvgradient"
+scale_along_z: 0
+embedded_instances {
+  id: "go"
+  data: "embedded_components {\n"
+  "  id: \"model\"\n"
+  "  type: \"model\"\n"
+  "  data: \"mesh: \\\"/builtins/assets/meshes/quad.dae\\\"\\n"
+  "name: \\\"{{NAME}}\\\"\\n"
+  "materials {\\n"
+  "  name: \\\"default\\\"\\n"
+  "  material: \\\"/examples/material/uvgradient/uvgradient.material\\\"\\n"
+  "}\\n"
+  "\"\n"
+  "}\n"
+  ""
+  position {
+    x: 360.0
+    y: 360.0
+  }
+  scale3 {
+    x: 720.0
+    y: 720.0
+    z: 50.0
+  }
+}

examples/material/uvgradient/uvgradient.fp

@@ -0,0 +1,7 @@
+varying mediump vec2 var_texcoord0;
+
+void main()
+{  
+    gl_FragColor = vec4(var_texcoord0.x, var_texcoord0.y, 0.5, 1.0f);
+}
+

examples/material/uvgradient/uvgradient.material

@@ -0,0 +1,21 @@
+name: "uvgradient"
+tags: "model"
+vertex_program: "/examples/material/uvgradient/uvgradient.vp"
+fragment_program: "/examples/material/uvgradient/uvgradient.fp"
+vertex_space: VERTEX_SPACE_LOCAL
+vertex_constants {
+  name: "mtx_worldview"
+  type: CONSTANT_TYPE_WORLDVIEW
+}
+vertex_constants {
+  name: "mtx_view"
+  type: CONSTANT_TYPE_VIEW
+}
+vertex_constants {
+  name: "mtx_proj"
+  type: CONSTANT_TYPE_PROJECTION
+}
+vertex_constants {
+  name: "mtx_normal"
+  type: CONSTANT_TYPE_NORMAL
+}

examples/material/uvgradient/uvgradient.vp

@@ -0,0 +1,24 @@
+
+// Positions can be world or local space, since world and normal
+// matrices are identity for world vertex space materials.
+// If world vertex space is selected, you can remove the
+// normal matrix multiplication for optimal performance.
+
+attribute highp vec4 position;
+attribute mediump vec2 texcoord0;
+attribute mediump vec3 normal;
+
+uniform mediump mat4 mtx_worldview;
+uniform mediump mat4 mtx_view;
+uniform mediump mat4 mtx_proj;
+uniform mediump mat4 mtx_normal;
+
+varying mediump vec2 var_texcoord0;
+
+void main()
+{
+    vec4 p = mtx_worldview * vec4(position.xyz, 1.0);
+    var_texcoord0 = texcoord0;
+    gl_Position = mtx_proj * p;
+}
+