Added example 24. Erode effect using perlin noise.

Added perlin noise function.
McNopper · May 4, 2013 · f55f152 · f55f152
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diff --git a/Example24/.cproject b/Example24/.cproject
diff --git a/Example24/.project b/Example24/.project
@@ -0,0 +1,88 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Example24</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.cdt.managedbuilder.core.genmakebuilder</name>
+			<triggers>clean,full,incremental,</triggers>
+			<arguments>
+				<dictionary>
+					<key>?name?</key>
+					<value></value>
+				</dictionary>
+				<dictionary>
+					<key>org.eclipse.cdt.make.core.append_environment</key>
+					<value>true</value>
+				</dictionary>
+				<dictionary>
+					<key>org.eclipse.cdt.make.core.autoBuildTarget</key>
+					<value>all</value>
+				</dictionary>
+				<dictionary>
+					<key>org.eclipse.cdt.make.core.buildArguments</key>
+					<value></value>
+				</dictionary>
+				<dictionary>
+					<key>org.eclipse.cdt.make.core.buildCommand</key>
+					<value>make</value>
+				</dictionary>
+				<dictionary>
+					<key>org.eclipse.cdt.make.core.buildLocation</key>
+					<value>${workspace_loc:/Example05/DebugMac}</value>
+				</dictionary>
+				<dictionary>
+					<key>org.eclipse.cdt.make.core.cleanBuildTarget</key>
+					<value>clean</value>
+				</dictionary>
+				<dictionary>
+					<key>org.eclipse.cdt.make.core.contents</key>
+					<value>org.eclipse.cdt.make.core.activeConfigSettings</value>
+				</dictionary>
+				<dictionary>
+					<key>org.eclipse.cdt.make.core.enableAutoBuild</key>
+					<value>false</value>
+				</dictionary>
+				<dictionary>
+					<key>org.eclipse.cdt.make.core.enableCleanBuild</key>
+					<value>true</value>
+				</dictionary>
+				<dictionary>
+					<key>org.eclipse.cdt.make.core.enableFullBuild</key>
+					<value>true</value>
+				</dictionary>
+				<dictionary>
+					<key>org.eclipse.cdt.make.core.fullBuildTarget</key>
+					<value>all</value>
+				</dictionary>
+				<dictionary>
+					<key>org.eclipse.cdt.make.core.stopOnError</key>
+					<value>true</value>
+				</dictionary>
+				<dictionary>
+					<key>org.eclipse.cdt.make.core.useDefaultBuildCmd</key>
+					<value>true</value>
+				</dictionary>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder</name>
+			<triggers>full,incremental,</triggers>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.linuxtools.rpm.rpmlint.rpmlintBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.cdt.core.cnature</nature>
+		<nature>org.eclipse.cdt.managedbuilder.core.managedBuildNature</nature>
+		<nature>org.eclipse.cdt.managedbuilder.core.ScannerConfigNature</nature>
+		<nature>org.eclipse.linuxtools.rpm.rpmlint.rpmlintNature</nature>
+	</natures>
+</projectDescription>
diff --git a/Example24/.settings/language.settings.xml b/Example24/.settings/language.settings.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<project>
+	<configuration id="cdt.managedbuild.config.gnu.mingw.exe.debug.894771756.809860878.1368823954.968111795" name="x64__Darwin__GCC_Debug">
+		<extension point="org.eclipse.cdt.core.LanguageSettingsProvider">
+			<provider-reference id="org.eclipse.cdt.managedbuilder.core.GCCBuildCommandParser" ref="shared-provider"/>
+			<provider-reference id="org.eclipse.cdt.managedbuilder.core.GCCBuiltinSpecsDetector" ref="shared-provider"/>
+		</extension>
+	</configuration>
+	<configuration id="cdt.managedbuild.config.gnu.mingw.exe.debug.894771756.809860878.1382563384.1598579354" name="x64__Linux__GCC_Debug">
+		<extension point="org.eclipse.cdt.core.LanguageSettingsProvider">
+			<provider-reference id="org.eclipse.cdt.ui.UserLanguageSettingsProvider" ref="shared-provider"/>
+			<provider-reference id="org.eclipse.cdt.managedbuilder.core.MBSLanguageSettingsProvider" ref="shared-provider"/>
+			<provider-reference id="org.eclipse.cdt.managedbuilder.core.GCCBuildCommandParser" ref="shared-provider"/>
+			<provider-reference id="org.eclipse.cdt.managedbuilder.core.GCCBuiltinSpecsDetector" ref="shared-provider"/>
+		</extension>
+	</configuration>
+	<configuration id="cdt.managedbuild.config.gnu.mingw.exe.debug.894771756.809860878.1112206935" name="x86__Linux__GCC_Debug">
+		<extension point="org.eclipse.cdt.core.LanguageSettingsProvider">
+			<provider-reference id="org.eclipse.cdt.ui.UserLanguageSettingsProvider" ref="shared-provider"/>
+			<provider-reference id="org.eclipse.cdt.managedbuilder.core.MBSLanguageSettingsProvider" ref="shared-provider"/>
+			<provider-reference id="org.eclipse.cdt.managedbuilder.core.GCCBuildCommandParser" ref="shared-provider"/>
+			<provider-reference id="org.eclipse.cdt.managedbuilder.core.GCCBuiltinSpecsDetector" ref="shared-provider"/>
+		</extension>
+	</configuration>
+	<configuration id="cdt.managedbuild.config.gnu.mingw.exe.debug.894771756.1982576218" name="x86__Windows__MinGW_Debug">
+		<extension point="org.eclipse.cdt.core.LanguageSettingsProvider">
+			<provider copy-of="extension" id="org.eclipse.cdt.ui.UserLanguageSettingsProvider"/>
+			<provider-reference id="org.eclipse.cdt.managedbuilder.core.MBSLanguageSettingsProvider" ref="shared-provider"/>
+		</extension>
+	</configuration>
+	<configuration id="cdt.managedbuild.config.gnu.mingw.exe.release.289745933.146695515" name="x86__Windows__MinGW_Release">
+		<extension point="org.eclipse.cdt.core.LanguageSettingsProvider">
+			<provider copy-of="extension" id="org.eclipse.cdt.ui.UserLanguageSettingsProvider"/>
+			<provider-reference id="org.eclipse.cdt.managedbuilder.core.MBSLanguageSettingsProvider" ref="shared-provider"/>
+		</extension>
+	</configuration>
+</project>
diff --git a/Example24/.settings/org.eclipse.cdt.managedbuilder.core.prefs b/Example24/.settings/org.eclipse.cdt.managedbuilder.core.prefs
@@ -0,0 +1,22 @@
+#Wed Jan 11 19:59:32 CET 2012
+eclipse.preferences.version=1
+environment/buildEnvironmentInclude/cdt.managedbuild.config.gnu.mingw.exe.debug.894771756/CPATH/delimiter=;
+environment/buildEnvironmentInclude/cdt.managedbuild.config.gnu.mingw.exe.debug.894771756/CPATH/operation=remove
+environment/buildEnvironmentInclude/cdt.managedbuild.config.gnu.mingw.exe.debug.894771756/C_INCLUDE_PATH/delimiter=;
+environment/buildEnvironmentInclude/cdt.managedbuild.config.gnu.mingw.exe.debug.894771756/C_INCLUDE_PATH/operation=remove
+environment/buildEnvironmentInclude/cdt.managedbuild.config.gnu.mingw.exe.debug.894771756/append=true
+environment/buildEnvironmentInclude/cdt.managedbuild.config.gnu.mingw.exe.debug.894771756/appendContributed=true
+environment/buildEnvironmentInclude/cdt.managedbuild.config.gnu.mingw.exe.release.289745933/CPATH/delimiter=;
+environment/buildEnvironmentInclude/cdt.managedbuild.config.gnu.mingw.exe.release.289745933/CPATH/operation=remove
+environment/buildEnvironmentInclude/cdt.managedbuild.config.gnu.mingw.exe.release.289745933/C_INCLUDE_PATH/delimiter=;
+environment/buildEnvironmentInclude/cdt.managedbuild.config.gnu.mingw.exe.release.289745933/C_INCLUDE_PATH/operation=remove
+environment/buildEnvironmentInclude/cdt.managedbuild.config.gnu.mingw.exe.release.289745933/append=true
+environment/buildEnvironmentInclude/cdt.managedbuild.config.gnu.mingw.exe.release.289745933/appendContributed=true
+environment/buildEnvironmentLibrary/cdt.managedbuild.config.gnu.mingw.exe.debug.894771756/LIBRARY_PATH/delimiter=;
+environment/buildEnvironmentLibrary/cdt.managedbuild.config.gnu.mingw.exe.debug.894771756/LIBRARY_PATH/operation=remove
+environment/buildEnvironmentLibrary/cdt.managedbuild.config.gnu.mingw.exe.debug.894771756/append=true
+environment/buildEnvironmentLibrary/cdt.managedbuild.config.gnu.mingw.exe.debug.894771756/appendContributed=true
+environment/buildEnvironmentLibrary/cdt.managedbuild.config.gnu.mingw.exe.release.289745933/LIBRARY_PATH/delimiter=;
+environment/buildEnvironmentLibrary/cdt.managedbuild.config.gnu.mingw.exe.release.289745933/LIBRARY_PATH/operation=remove
+environment/buildEnvironmentLibrary/cdt.managedbuild.config.gnu.mingw.exe.release.289745933/append=true
+environment/buildEnvironmentLibrary/cdt.managedbuild.config.gnu.mingw.exe.release.289745933/appendContributed=true
diff --git a/Example24/shader/erode.frag.glsl b/Example24/shader/erode.frag.glsl
@@ -0,0 +1,73 @@
+#version 150
+
+struct LightProperties
+{
+	vec3 direction;
+	vec4 ambientColor;
+	vec4 diffuseColor;
+	vec4 specularColor;
+};
+
+struct MaterialProperties
+{
+	vec4 ambientColor;
+	vec4 diffuseColor;
+	vec4 specularColor;
+	float specularExponent;
+};
+
+uniform	LightProperties u_light;
+uniform	MaterialProperties u_material;
+
+uniform sampler3D u_texture;
+
+uniform float u_erode;
+
+in vec3 v_normal;
+in vec3 v_eye;
+in vec3 v_vertex;
+
+out vec4 fragColor;
+
+void main()
+{
+	float erodeLevel = texture(u_texture, normalize(v_vertex)).r;
+
+	// u_erode gets smaller over time. If this value is smaller than the reference texel, discard it.
+	// This results in an erode effect over time.
+	if (erodeLevel > u_erode)
+	{
+		discard;
+	}
+
+	// If not dicarded, render standard phong.
+
+	vec4 color = u_light.ambientColor * u_material.ambientColor;
+
+	vec3 normal = normalize(v_normal);
+
+	float nDotL = max(dot(u_light.direction, normal), 0.0);
+
+	if (nDotL > 0.0)
+	{
+		vec3 eye = normalize(v_eye);
+
+		// Incident vector is opposite light direction vector.
+		vec3 reflection = reflect(-u_light.direction, normal);
+
+		float eDotR = max(dot(eye, reflection), 0.0);
+
+		color += u_light.diffuseColor * u_material.diffuseColor * nDotL;
+
+		float specularIntensity = 0.0;
+
+		if (eDotR > 0.0)
+		{
+			specularIntensity = pow(eDotR, u_material.specularExponent);
+		}
+
+		color += u_light.specularColor * u_material.specularColor * specularIntensity;
+	}
+
+	fragColor = color;
+}   
diff --git a/Example24/shader/erode.vert.glsl b/Example24/shader/erode.vert.glsl
@@ -0,0 +1,27 @@
+#version 150
+
+uniform mat4 u_projectionMatrix;
+uniform mat4 u_modelViewMatrix;
+uniform mat3 u_normalMatrix;
+
+in vec4 a_vertex;
+in vec3 a_normal;
+
+out vec3 v_normal;
+out vec3 v_eye;
+out vec3 v_vertex;
+
+void main()
+{
+	vec4 vertex = u_modelViewMatrix * a_vertex;
+
+	v_eye = -vec3(vertex);
+
+	v_normal = u_normalMatrix * a_normal;
+
+	// The later fetched texel is always the same. So when the sphere rotates,
+	// the associated texel rotates on the surface of the sphere as well.
+	v_vertex = vec3(a_vertex);
+
+	gl_Position = u_projectionMatrix * vertex;
+}