introduced librender

9 files changed, 679 insertions, 0 deletions

diff --git a/src/render/Makefile.am b/src/render/Makefile.am
new file mode 100644
index 0000000..a993703
--- /dev/null
+++ b/src/render/Makefile.am
@@ -0,0 +1,7 @@
+INCLUDES = -I$(top_srcdir)/src
+METASOURCES = AUTO
+noinst_LTLIBRARIES = librender.la
+librender_la_LDFLAGS = -avoid-version -no-undefined @GL_LIBS@
+librender_la_LIBADD = $(top_builddir)/src/math/libmath.la
+librender_la_SOURCES = box.cc gl.cc render.cc sphere.cc
+noinst_HEADERS = box.h gl.h render.h sphere.h
diff --git a/src/render/box.cc b/src/render/box.cc
new file mode 100644
index 0000000..8819a40
--- /dev/null
+++ b/src/render/box.cc
@@ -0,0 +1,102 @@
+/*
+   gl/box.cc
+   This file is part of the Osirion project and is distributed under 
+   the terms of the GNU General Public License version 2 
+*/
+
+// project headers
+#include "render/box.h"
+
+namespace render {
+
+using math::Vector3f;
+using math::Color;
+
+Box::Box(Vector3f const & tl, Vector3f const &br) : 
+	topleft(tl), bottomright(br)
+{
+	topcolor = Color::White();
+	bottomcolor= Color::White() * 0.7f;
+}
+
+Box::Box(const Box & other)
+{
+	(*this) = other;
+}
+
+Box& Box::operator=(const Box &other)
+{
+	bottomcolor = other.bottomcolor;
+	topcolor = other.topcolor;
+
+	topleft = other.topleft;
+	bottomright = other.bottomright;
+	return (*this);
+}
+
+void Box::draw()
+{
+	using namespace gl;
+
+	Vector3f v0(topleft.x, bottomright.y, bottomright.z);
+	Vector3f v1(topleft.x,  topleft.y, bottomright.z);
+	Vector3f v2(topleft.x,  topleft.y,  topleft.z);
+	Vector3f v3(topleft.x, bottomright.y,  topleft.z);
+
+	Vector3f v4(bottomright.x, bottomright.y, bottomright.z);
+	Vector3f v5(bottomright.x,  topleft.y, bottomright.z);
+	Vector3f v6(bottomright.x,  topleft.y,  topleft.z);
+	Vector3f v7(bottomright.x, bottomright.y,  topleft.z);
+
+	begin(Quads);
+
+	// top
+	color(topcolor);	
+	vertex(v2);
+	vertex(v1);
+        vertex(v5);
+	vertex(v6);
+	
+	// sides
+	color(bottomcolor);
+	vertex(v0);
+	color(topcolor);
+    	vertex(v1);
+        vertex(v2);
+	color(bottomcolor);
+        vertex(v3);
+
+        vertex(v3);
+	color(topcolor);
+    	vertex(v2);
+        vertex(v6);
+	color(bottomcolor);
+        vertex(v7);
+
+	vertex(v4);
+	color(topcolor);
+    	vertex(v5);
+        vertex(v1);
+	color(bottomcolor);
+        vertex(v0);
+
+	vertex(v7);
+	color(topcolor);
+    	vertex(v6);
+        vertex(v5);
+	color(bottomcolor);
+        vertex(v4);
+
+	// bottom
+	color(bottomcolor);	
+	vertex(v4);
+	vertex(v0);
+        vertex(v3);
+	vertex(v7);
+
+	end();
+
+}
+
+}
+
diff --git a/src/render/box.h b/src/render/box.h
new file mode 100644
index 0000000..9552b78
--- /dev/null
+++ b/src/render/box.h
@@ -0,0 +1,44 @@
+/*
+   gl/box.h
+   This file is part of the Osirion project and is distributed under 
+   the terms of the GNU General Public License version 2 
+*/
+
+#ifndef __INCLUDED_GL_BOX_H__
+#define __INCLUDED_GL_BOX_H__
+
+#include "render/render.h"
+#include "math/mathlib.h"
+
+namespace render {
+
+/// a drawable OpenGL block shape
+class Box 
+{
+public:
+	/// create a new standard cube with edge length 1
+	Box(math::Vector3f const & tl, math::Vector3f const &br);
+	/// copy constructor
+	Box(const Box &other);
+	
+	/// assignment operator
+ 	Box& operator=(const Box &other);
+
+	/// top left vertex (1,1,1)
+	math::Vector3f topleft;
+	/// bottom right vertex (-1,-1,-1)
+	math::Vector3f bottomright;
+
+	/// draw the block
+	void draw();
+
+	/// Top color
+	math::Color topcolor;
+	/// bottom color
+	math::Color bottomcolor;
+};
+
+}
+
+#endif // __INCLUDED_GL_BOX_H__
+
diff --git a/src/render/gl.cc b/src/render/gl.cc
new file mode 100644
index 0000000..6eb91b1
--- /dev/null
+++ b/src/render/gl.cc
@@ -0,0 +1,163 @@
+/*
+   render/gl.cc
+   This file is part of the Osirion project and is distributed under 
+   the terms of the GNU General Public License version 2 
+*/
+
+// project includes
+#include "render/gl.h"
+
+// system includes
+#include "GL/gl.h"
+
+using math::Vector3f;
+using math::Color;
+
+namespace render {
+
+namespace gl {
+
+std::string renderer()
+{
+	return std::string ((char *)glGetString(GL_RENDERER));
+}
+
+std::string vendor()
+{
+	return std::string ((char *)glGetString(GL_VENDOR));
+}
+
+std::string version()
+{
+	return std::string ((char *)glGetString(GL_VERSION));
+}
+
+std::string extensions()
+{
+	return std::string ((char *)glGetString(GL_EXTENSIONS));
+}
+
+void begin(Primitive primitive) 
+{ 
+	::glBegin(primitive); 
+}
+
+void end() { 
+	::glEnd(); 
+}
+
+void viewport(GLint x, GLint y, GLsizei width, GLsizei height)
+{
+	::glViewport(x, y, width, height);
+}
+
+void depthmask(GLenum mode)
+{
+	::glDepthMask(mode);
+}
+
+
+void frontface(GLenum mode)
+{
+	glFrontFace(mode);
+}
+
+void cullface(GLenum mode)
+{
+	glCullFace(mode);
+}
+
+void shademodel(GLenum mode)
+{
+	glShadeModel(mode);
+}
+
+void blendfunc(GLenum sfactor, GLenum dfactor)
+{
+	glBlendFunc(sfactor, dfactor);
+}
+
+void enable(GLenum cap)
+{	
+	glEnable(cap);
+}
+
+void disable(GLenum cap)
+{	
+	glDisable(cap);
+}
+
+void clear (GLbitfield mask) {
+	glClear(mask);
+}
+
+void clearcolor(Color const & color) {
+	glClearColor(color.red(), color.green(), color.blue(), color.alpha());
+}
+
+void clearcolor(const float r, const float g, const float b, const float a) {
+	glClearColor(r,g,b, a);
+}
+
+void rotate(const float angle, const Vector3f& vector) { 
+	glRotatef(angle, vector[0], vector[1], vector[2]); 
+}
+
+void rotate(const float angle, const float x, const float y, const float z) { 
+	glRotatef(angle, x, y, z); 
+}
+
+void translate(const Vector3f& vector) { 
+	glTranslatef(vector[0], vector[1], vector[2]); 
+}
+
+void translate(const float x, const float y, const float z) { 
+	glTranslatef(x, y, z); 
+}
+void scale(const Vector3f& vector) { 
+	glScalef(vector[0], vector[1], vector[2]); 
+}
+
+void scale(const float x, const float y, const float z) { 
+	glScalef(x, y, z); 
+}
+
+void vertex(const Vector3f& vector) { 
+	glVertex3f(vector[0], vector[1],  vector[2]);
+}
+
+void vertex(const float x, const float y, const float z) {
+	glVertex3f(x, y, z);
+}
+
+void push() {
+	glPushMatrix();
+}
+
+void pop() {
+	glPopMatrix();
+}
+
+void color(const float r, const float g, const float b, const float a) {
+	glColor4f(r,g,b,a);
+}
+void color(Color const & color) {
+	glColor4f(color.red(), color.green(), color.blue(), color.alpha());
+}
+
+void matrixmode(GLenum mode) {
+	glMatrixMode(mode);
+}
+
+void loadidentity() {
+	glLoadIdentity();
+}
+
+void frustum(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble znear, GLdouble zfar) 
+{
+	glFrustum(left, right, bottom, top, znear, zfar);
+}
+
+} // namespace gl
+
+} // namespace render
diff --git a/src/render/gl.h b/src/render/gl.h
new file mode 100644
index 0000000..0513410
--- /dev/null
+++ b/src/render/gl.h
@@ -0,0 +1,168 @@
+/*
+   render/gl.h
+   This file is part of the Osirion project and is distributed under 
+   the terms of the GNU General Public License version 2 
+*/
+
+#ifndef __INCLUDED_RENDER_GL_H__
+#define __INCLUDED_RENDER_GL_H__
+
+// project headers
+#include "math/vector3f.h"
+#include "math/color.h"
+
+// OpenGL headers
+#include <GL/gl.h>
+
+namespace render {
+
+/// wrapper namespace for OpenGL operations
+/** The gl namespace provides a wrapper to the OpenGL library functions.
+ *  All methods take floats or Vector3f and Color as parameters.
+ */
+namespace gl
+{
+	/// name of the hardware OpenGL renderer
+	std::string renderer();
+	/// vender of the system OpenGL implementation
+	std::string vendor();
+	/// version of the system OpenGL implementation
+	std::string version();
+	/// Opengl Extensions string
+	std::string extensions();
+
+	/// enum to denote Vertex drawing modes
+	enum Primitive {
+		Points=GL_POINTS,
+		Lines=GL_LINES,
+		LineStrip=GL_LINE_STRIP,
+		LineLoop=GL_LINE_LOOP,
+		Triangles=GL_TRIANGLES,
+		TriangleStrip=GL_TRIANGLE_STRIP,
+		TriangleFan=GL_TRIANGLE_FAN,
+		Quads=GL_QUADS,
+		QuadStrip=GL_QUAD_STRIP,
+		Polygon=GL_POLYGON
+	};
+
+	/// glViewPort
+	void viewport(GLint x, GLint y, GLsizei width, GLsizei height );
+
+	/// set the color used to clear to buffer 
+	void clearcolor(math::Color const &color);
+	void clearcolor(const float r, const float g, const float b, const float a);
+
+	/// clear buffers to preset values
+	void clear (GLbitfield mask);
+
+	/// glMatrixMode
+	void matrixmode(GLenum mode);
+
+	/// glEnable
+	void enable(GLenum cap);
+
+	/// glDisable
+	void disable(GLenum cap);
+
+	/// glShadeModel
+	void shademodel(GLenum mode);
+
+	/// glCullFace
+	void cullface(GLenum mode);
+
+	/// glFrontFace
+	void frontface(GLenum mode);
+
+	/// glDepthMask
+	void depthmask(GLenum mode);
+
+	/// glBlendFunc
+	void blendfunc(GLenum sfactor, GLenum dfactor);
+
+	/// Delimite the start of a sequence of verteces describing a primitive or group of primitives
+	/** @param primitive The type of drawing primitive
+	 *  @see end()
+	 */
+	void begin(Primitive primitive);
+
+	/// delimit the end of a sequence of verteces describing a primitive or group of primitives
+	/** @see begin()
+	 */
+	void end();
+
+	/// Add the next vertex the the current drawing operation
+	/** From the glVertex() description:
+	 *  vertex() commands are used within begin()/end() pairs to specify point,
+	 *  line, and polygon vertices.  The current color, normal, and texture
+	 *  coordinates are associated with the vertex when vertex() is called.
+	 */
+	void vertex(const math::Vector3f& vector);
+	
+	void vertex(const float x, const float y, const float z);
+	
+	/// multiply the current matrix by a general rotation matrix
+	/** @param angle The angle of the rotation, in degrees [0-360]
+	 *  @param vector The rotation axes, relative to the origin (0,0,0)
+	 */
+	void rotate(const float angle, const math::Vector3f& vector);
+
+	/// multiply the current matrix by a general rotation matrix
+	/** @param angle The angle of the rotation, in degrees
+	 *  @param x The x-coordinate of the rotation vector
+	 *  @param y The y-coordinate of the rotation vector
+	 *  @param z The z-coordinate of the rotation vector
+	 */
+	void rotate(const float angle, const float x, const float y, const float z);
+
+	/// multiply the current matrix by a general translation matrix
+	/** @param vector The translation vector, relative to the origin (0,0,0)
+	 */
+	void translate(const math::Vector3f& vector);
+
+	/// multiply the current matrix by a general translation matrix
+	/** @param x The x-coordinate of the translation vector
+	 *  @param y The y-coordinate of the translation vector
+	 *  @param z The z-coordinate of the translation vector
+	 */
+	void translate(const float x, const float y, const float z);
+
+	/// multiply the current matrix by a general scaling matrix
+	/** @param vector The scale factor for all 3 axes
+	 */
+	void scale(const math::Vector3f& vector);
+
+	/// multiply the current matrix by a general scaling matrix
+	/** @param x x-scaling factor
+	 * @param y y-scaling factor
+	 * @param z z-scaling factor
+	 */
+	void scale(const float x, const float y, const float z);
+
+	/// specify the drawing color for the next GL functions
+	/** @param color the new drawing color
+	 */
+	void color(math::Color const & color);
+		
+	/** @param r red value of the new drawing color
+	 *  @param g green value of the new drawing color
+	 *  @param b blue value of the new drawing color
+	 *  @param a alpha value of the new drawing color
+	 */
+	void color(const float r, const float g, const float b, const float a=1.0f);
+	
+	/// Push the current transformation matrix to the stack
+	void push();
+	
+	/// Replace the transformation matrix with the top from the stack
+	void pop();
+	
+	/// Replace the transformation matrix with the identity matrtix
+	void loadidentity();
+
+	/// Perspective matrix
+	void frustum(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble znear, GLdouble zfar);
+}
+
+}
+
+#endif // __INCLUDED_RENDER_GL_H__
diff --git a/src/render/render.cc b/src/render/render.cc
new file mode 100644
index 0000000..2440b25
--- /dev/null
+++ b/src/render/render.cc
@@ -0,0 +1,27 @@
+/*
+   render/render.cc
+   This file is part of the Osirion project and is distributed under 
+   the terms of the GNU General Public License version 2 
+*/
+
+// project headers
+#include "render/render.h"
+#include "sys/sys.h"
+
+namespace render {
+
+void init() 
+{
+	con_debug << "Initializing render..." << std::endl;
+
+	con_print << "Renderer:  " << gl::renderer() << std::endl;
+	con_print << "Vendor:    " << gl::vendor() << std::endl;
+	con_print << "Version:   " << gl::version() << std::endl;
+}
+
+void shutdown()
+{
+	con_debug << "Shutting down render..." << std::endl;
+}
+
+}
diff --git a/src/render/render.h b/src/render/render.h
new file mode 100644
index 0000000..eaaef73
--- /dev/null
+++ b/src/render/render.h
@@ -0,0 +1,22 @@
+/*
+   render/render.h
+   This file is part of the Osirion project and is distributed under 
+   the terms of the GNU General Public License version 2 
+*/
+
+#ifndef __INCLUDED_RENDER_H__
+#define __INCLUDED_RENDER_H__
+
+
+namespace render {
+
+	/// initialize the render subsystem
+	void init();
+
+	/// shutdown the render subsystem
+	void shutdown();
+}
+
+#include "render/gl.h"
+
+#endif // __INCLUDED_RENDER_H__
diff --git a/src/render/sphere.cc b/src/render/sphere.cc
new file mode 100644
index 0000000..1715263
--- /dev/null
+++ b/src/render/sphere.cc
@@ -0,0 +1,95 @@
+/*
+   gl/sphere.cc
+   This file is part of the Osirion project and is distributed under 
+   the terms of the GNU General Public License version 2 
+*/
+
+#include "render/sphere.h"
+#include "math/mathlib.h"
+
+using math::Vector3f;
+using math::Color;
+
+namespace render {
+
+const int segments = 33;
+
+Sphere::Sphere(Vector3f p , float r)
+{
+	position = p;
+	radius = r;
+		
+	// TODO make global sine-cosine lists
+	sintable = new float[segments];
+	costable = new float[segments];
+	float d = 2 * M_PI / segments;
+
+	for (int i=0; i < segments; i++) {
+		sintable[i] = sin( d * (float) i );
+		costable[i] = cos ( d * (float) i );
+	}
+}
+
+Sphere::~Sphere()
+{
+	delete[] sintable;
+	delete[] costable;
+}
+
+Sphere::Sphere(const Sphere &other) 
+{
+	(*this) = other;
+}
+	
+Sphere& Sphere::operator=(const Sphere &other)
+{
+	position = other.position;
+	radius = other.radius;
+	return (*this);
+}
+
+void Sphere::draw()
+{
+	using namespace gl;
+
+	// draw top
+	// TODO upside-down
+	float r = radius*sintable[1];
+	float h = radius*costable[1];
+
+	begin(LineLoop);
+	//begin(Polygon);
+	for (int i = segments-1; i >= 0; i--)
+		vertex(r*costable[i], h, r*sintable[i]);
+	end();
+
+	// draw bottom
+	// TODO upside-down
+	begin(LineLoop);
+	for (int i = 0; i< segments; i++)
+		vertex(r*costable[i], -h, r*sintable[i]);
+	end();
+
+	// draw body
+	for (int j=1; j < segments-1; j++) {
+		r = radius*sintable[j];
+		float r1 = radius*sintable[j+1];
+		
+		begin(QuadStrip);
+		vertex(r1, radius*costable[j+1], 0);
+		vertex(r, radius*costable[j], 0);
+
+		for (int i = segments-1; i >= 0; i--) {			
+			vertex(r1*costable[i], radius*costable[j+1], r1*sintable[i]);
+			vertex(r*costable[i], radius*costable[j], r*sintable[i]);
+			//vertex(r*costable[i-1], radius*costable[j], r*sintable[i-1]);
+			//vertex(r1*costable[i-1], radius*costable[j+1], r1*sintable[i-1]);
+		}
+		end();
+		
+	}
+}
+	
+
+}
+
diff --git a/src/render/sphere.h b/src/render/sphere.h
new file mode 100644
index 0000000..b3ac826
--- /dev/null
+++ b/src/render/sphere.h
@@ -0,0 +1,51 @@
+/*
+   gl/sphere.h
+   This file is part of the Osirion project and is distributed under 
+   the terms of the GNU General Public License version 2 
+*/
+
+#ifndef __INCLUDED_GL_SPHERE_H__
+#define __INCLUDED_GL_SPHERE_H__
+
+#include "render/gl.h"
+
+namespace render {
+
+/// a drawable OpenGL block shape
+class Sphere 
+{
+public:
+	/// create a new sphere
+	Sphere(math::Vector3f p = math::Vector3f(), float r = 1.0f);
+
+	/// copy constructor
+	Sphere(const Sphere &other);
+
+	/// destructor
+	~Sphere();
+	
+	/// assignment operator
+ 	Sphere& operator=(const Sphere &other);
+
+	/// radius of the sphere
+	float radius;
+
+	/// position of the sphere
+	math::Vector3f position;
+
+	/// draw the sphere
+	void draw();
+
+	/// Top color
+	math::Color topcolor;
+	/// bottom color
+	math::Color bottomcolor;
+
+private:
+	float  *sintable;
+	float  *costable;
+};
+
+} // namespace gl
+
+#endif // __INCLUDED_GL_SPHERE_H__