added

git-svn-id: http://hq.motion-twin.com/svn/galaxy55/fla/engine@18 ebaa5d33-9041-4c07-8396-3622ceb66f44

engine.hxml

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+-cp samples
+-swf engine.swf
+-swf-header 800:600:30:FFFFFF
+--flash-strict
+-swf-version 11
+-main Test
+-lib format

engine.hxproj

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+<?xml version="1.0" encoding="utf-8"?>
+<project version="2">
+  <!-- Output SWF options -->
+  <output>
+    <movie outputType="Application" />
+    <movie input="" />
+    <movie path="engine.swf" />
+    <movie fps="30" />
+    <movie width="800" />
+    <movie height="600" />
+    <movie version="11" />
+    <movie minorVersion="0" />
+    <movie platform="Flash Player" />
+    <movie background="#FFFFFF" />
+  </output>
+  <!-- Other classes to be compiled into your SWF -->
+  <classpaths>
+    <class path="samples" />
+  </classpaths>
+  <!-- Build options -->
+  <build>
+    <option directives="" />
+    <option flashStrict="True" />
+    <option mainClass="Test" />
+    <option enabledebug="False" />
+    <option additional="-lib format" />
+  </build>
+  <!-- haxelib libraries -->
+  <haxelib>
+    <!-- example: <library name="..." /> -->
+  </haxelib>
+  <!-- Class files to compile (other referenced classes will automatically be included) -->
+  <compileTargets>
+    <!-- example: <compile path="..." /> -->
+  </compileTargets>
+  <!-- Assets to embed into the output SWF -->
+  <library>
+    <!-- example: <asset path="..." id="..." update="..." glyphs="..." mode="..." place="..." sharepoint="..." /> -->
+  </library>
+  <!-- Paths to exclude from the Project Explorer tree -->
+  <hiddenPaths>
+    <hidden path="engine.hxml" />
+  </hiddenPaths>
+  <!-- Executed before build -->
+  <preBuildCommand />
+  <!-- Executed after build -->
+  <postBuildCommand alwaysRun="False" />
+  <!-- Other project options -->
+  <options>
+    <option showHiddenPaths="False" />
+    <option testMovie="Default" />
+  </options>
+  <!-- Plugin storage -->
+  <storage />
+</project>

h3d/Camera.hx

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+package h3d;
+
+// use left-handed coordinate system, more suitable for 2D games X=0,Y=0 at screen top-left and Z towards user
+
+class Camera {
+
+	public var zoom : Float;
+	public var ratio : Float;
+	public var fov : Float;
+	public var zNear : Float;
+	public var zFar : Float;
+
+	public var mproj : Matrix;
+	public var mcam : Matrix;
+	public var m : Matrix;
+
+	public var pos : Vector;
+	public var up : Vector;
+	public var target : Vector;
+
+	public function new( fov = 60., zoom = 1., ratio = 1.333333, zNear = 0.02, zFar = 4000. ) {
+		this.fov = fov;
+		this.zoom = zoom;
+		this.ratio = ratio;
+		this.zNear = zNear;
+		this.zFar = zFar;
+		pos = new Vector(2, 3, 4);
+		up = new Vector(0, 0, -1);
+		target = new Vector(0, 0, 0);
+		m = new Matrix();
+		mcam = new Matrix();
+		update();
+	}
+
+	public function update() {
+		var az = pos.sub(target);
+		az.normalize();
+		var ax = up.cross(az);
+		ax.normalize();
+		if( ax.length() == 0 ) {
+			ax.x = az.y;
+			ax.y = az.z;
+			ax.z = az.x;
+		}
+		var ay = az.cross(ax);
+		mcam._11 = ax.x;
+		mcam._12 = ay.x;
+		mcam._13 = az.x;
+		mcam._14 = 0;
+		mcam._21 = ax.y;
+		mcam._22 = ay.y;
+		mcam._23 = az.y;
+		mcam._24 = 0;
+		mcam._31 = ax.z;
+		mcam._32 = ay.z;
+		mcam._33 = az.z;
+		mcam._34 = 0;
+		mcam._41 = -ax.dot3(pos);
+		mcam._42 = -ay.dot3(pos);
+		mcam._43 = -az.dot3(pos);
+		mcam._44 = 1;
+		mproj = makeFrustumMatrix();
+		m.multiply4x4(mcam, mproj);
+	}
+
+	public function lostUp() {
+		var p2 = pos.copy();
+		p2.normalize();
+		return Math.abs(p2.dot3(up)) > 0.999;
+	}
+
+	public function movePosAxis( dx : Float, dy : Float, dz = 0. ) {
+		var p = new Vector(dx, dy, dz);
+		p.project3x3(mcam);
+		pos.x += p.x;
+		pos.y += p.y;
+		pos.z += p.z;
+	}
+
+	public function moveTargetAxis( dx : Float, dy : Float, dz = 0. ) {
+		var p = new Vector(dx, dy, dz);
+		p.project3x3(mcam);
+		target.x += p.x;
+		target.y += p.y;
+		target.z += p.z;
+	}
+
+	function makeFrustumMatrix() {
+		var scale = zoom / Math.tan(fov * Math.PI / 360.0);
+		var m = new Matrix();
+		m.zero();
+		m._11 = scale;
+		m._22 = -scale * ratio;
+		m._33 = zFar / (zNear - zFar);
+		m._34 = -1;
+		m._43 = (zNear * zFar) / (zNear - zFar);
+		return m;
+	}
+
+}