-/*
- * FreeGLUT Shapes Demo
- *
- * Written by Nigel Stewart November 2003
- *
- * This program is test harness for the sphere, cone
- * and torus shapes in FreeGLUT.
- *
- * Spinning wireframe and smooth shaded shapes are
- * displayed until the ESC or q key is pressed. The
- * number of geometry stacks and slices can be adjusted
- * using the + and - keys.
- */
+/*! \file shapes.c
+ \ingroup demos
+
+ This program is a test harness for the various shapes
+ in OpenGLUT. It may also be useful to see which
+ parameters control what behavior in the OpenGLUT
+ objects.
+
+ Spinning wireframe and solid-shaded shapes are
+ displayed. Some parameters can be adjusted.
+
+ Keys:
+ - <tt>Esc </tt> Quit
+ - <tt>q Q </tt> Quit
+ - <tt>i I </tt> Show info
+ - <tt>p P </tt> Toggle perspective or orthographic projection
+ - <tt>r R </tt> Toggle fixed or animated rotation around model X-axis
+ - <tt>s S </tt> Toggle toggle fixed function or shader render path
+ - <tt>n N </tt> Toggle visualization of object's normal vectors
+ - <tt>= + </tt> Increase \a slices
+ - <tt>- _ </tt> Decreate \a slices
+ - <tt>, < </tt> Decreate \a stacks
+ - <tt>. > </tt> Increase \a stacks
+ - <tt>9 ( </tt> Decreate \a depth (Sierpinski Sponge)
+ - <tt>0 ) </tt> Increase \a depth (Sierpinski Sponge)
+ - <tt>up </tt> Increase "outer radius"
+ - <tt>down </tt> Decrease "outer radius"
+ - <tt>left </tt> Decrease "inner radius"
+ - <tt>right</tt> Increase "inner radius"
+ - <tt>PgUp </tt> Next shape-drawing function
+ - <tt>PgDn </tt> Prev shape-drawing function
+
+ \author Written by Nigel Stewart November 2003
+
+ \author Portions Copyright (C) 2004, the OpenGLUT project contributors. <br>
+ OpenGLUT branched from freeglut in February, 2004.
+
+ \image html openglut_shapes.png OpenGLUT Geometric Shapes Demonstration
+ \include demos/shapes/shapes.c
+*/
#include <GL/freeglut.h>
+#include <stdarg.h>
+#include <stdio.h>
#include <stdlib.h>
+#include <stddef.h>
+
+#include "glmatrix.h"
+
+#ifdef _MSC_VER
+/* DUMP MEMORY LEAKS */
+#include <crtdbg.h>
+#endif
+
+/* report GL errors, if any, to stderr */
+void checkError(const char *functionName)
+{
+ GLenum error;
+ while (( error = glGetError() ) != GL_NO_ERROR) {
+ fprintf (stderr, "GL error 0x%X detected in %s\n", error, functionName);
+ }
+}
+
+/*
+ * OpenGL 2+ shader mode needs some function and macro definitions,
+ * avoiding a dependency on additional libraries like GLEW or the
+ * GL/glext.h header
+ */
+#ifndef GL_FRAGMENT_SHADER
+#define GL_FRAGMENT_SHADER 0x8B30
+#endif
+
+#ifndef GL_VERTEX_SHADER
+#define GL_VERTEX_SHADER 0x8B31
+#endif
+
+#ifndef GL_COMPILE_STATUS
+#define GL_COMPILE_STATUS 0x8B81
+#endif
+
+#ifndef GL_LINK_STATUS
+#define GL_LINK_STATUS 0x8B82
+#endif
+
+#ifndef GL_INFO_LOG_LENGTH
+#define GL_INFO_LOG_LENGTH 0x8B84
+#endif
+
+typedef ptrdiff_t ourGLsizeiptr;
+typedef char ourGLchar;
+
+#ifndef APIENTRY
+#define APIENTRY
+#endif
+
+#ifndef GL_VERSION_2_0
+typedef GLuint (APIENTRY *PFNGLCREATESHADERPROC) (GLenum type);
+typedef void (APIENTRY *PFNGLSHADERSOURCEPROC) (GLuint shader, GLsizei count, const ourGLchar **string, const GLint *length);
+typedef void (APIENTRY *PFNGLCOMPILESHADERPROC) (GLuint shader);
+typedef GLuint (APIENTRY *PFNGLCREATEPROGRAMPROC) (void);
+typedef void (APIENTRY *PFNGLATTACHSHADERPROC) (GLuint program, GLuint shader);
+typedef void (APIENTRY *PFNGLLINKPROGRAMPROC) (GLuint program);
+typedef void (APIENTRY *PFNGLUSEPROGRAMPROC) (GLuint program);
+typedef void (APIENTRY *PFNGLGETSHADERIVPROC) (GLuint shader, GLenum pname, GLint *params);
+typedef void (APIENTRY *PFNGLGETSHADERINFOLOGPROC) (GLuint shader, GLsizei bufSize, GLsizei *length, ourGLchar *infoLog);
+typedef void (APIENTRY *PFNGLGETPROGRAMIVPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRY *PFNGLGETPROGRAMINFOLOGPROC) (GLuint program, GLsizei bufSize, GLsizei *length, ourGLchar *infoLog);
+typedef GLint (APIENTRY *PFNGLGETATTRIBLOCATIONPROC) (GLuint program, const ourGLchar *name);
+typedef GLint (APIENTRY *PFNGLGETUNIFORMLOCATIONPROC) (GLuint program, const ourGLchar *name);
+typedef void (APIENTRY *PFNGLUNIFORMMATRIX4FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRY *PFNGLUNIFORMMATRIX3FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+#endif
+
+PFNGLCREATESHADERPROC gl_CreateShader;
+PFNGLSHADERSOURCEPROC gl_ShaderSource;
+PFNGLCOMPILESHADERPROC gl_CompileShader;
+PFNGLCREATEPROGRAMPROC gl_CreateProgram;
+PFNGLATTACHSHADERPROC gl_AttachShader;
+PFNGLLINKPROGRAMPROC gl_LinkProgram;
+PFNGLUSEPROGRAMPROC gl_UseProgram;
+PFNGLGETSHADERIVPROC gl_GetShaderiv;
+PFNGLGETSHADERINFOLOGPROC gl_GetShaderInfoLog;
+PFNGLGETPROGRAMIVPROC gl_GetProgramiv;
+PFNGLGETPROGRAMINFOLOGPROC gl_GetProgramInfoLog;
+PFNGLGETATTRIBLOCATIONPROC gl_GetAttribLocation;
+PFNGLGETUNIFORMLOCATIONPROC gl_GetUniformLocation;
+PFNGLUNIFORMMATRIX4FVPROC gl_UniformMatrix4fv;
+PFNGLUNIFORMMATRIX3FVPROC gl_UniformMatrix3fv;
+
+void initExtensionEntries(void)
+{
+ gl_CreateShader = (PFNGLCREATESHADERPROC) glutGetProcAddress ("glCreateShader");
+ gl_ShaderSource = (PFNGLSHADERSOURCEPROC) glutGetProcAddress ("glShaderSource");
+ gl_CompileShader = (PFNGLCOMPILESHADERPROC) glutGetProcAddress ("glCompileShader");
+ gl_CreateProgram = (PFNGLCREATEPROGRAMPROC) glutGetProcAddress ("glCreateProgram");
+ gl_AttachShader = (PFNGLATTACHSHADERPROC) glutGetProcAddress ("glAttachShader");
+ gl_LinkProgram = (PFNGLLINKPROGRAMPROC) glutGetProcAddress ("glLinkProgram");
+ gl_UseProgram = (PFNGLUSEPROGRAMPROC) glutGetProcAddress ("glUseProgram");
+ gl_GetShaderiv = (PFNGLGETSHADERIVPROC) glutGetProcAddress ("glGetShaderiv");
+ gl_GetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC) glutGetProcAddress ("glGetShaderInfoLog");
+ gl_GetProgramiv = (PFNGLGETPROGRAMIVPROC) glutGetProcAddress ("glGetProgramiv");
+ gl_GetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC) glutGetProcAddress ("glGetProgramInfoLog");
+ gl_GetAttribLocation = (PFNGLGETATTRIBLOCATIONPROC) glutGetProcAddress ("glGetAttribLocation");
+ gl_GetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC) glutGetProcAddress ("glGetUniformLocation");
+ gl_UniformMatrix4fv = (PFNGLUNIFORMMATRIX4FVPROC) glutGetProcAddress ("glUniformMatrix4fv");
+ gl_UniformMatrix3fv = (PFNGLUNIFORMMATRIX3FVPROC) glutGetProcAddress ("glUniformMatrix3fv");
+ if (!gl_CreateShader || !gl_ShaderSource || !gl_CompileShader || !gl_CreateProgram || !gl_AttachShader || !gl_LinkProgram || !gl_UseProgram || !gl_GetShaderiv || !gl_GetShaderInfoLog || !gl_GetProgramiv || !gl_GetProgramInfoLog || !gl_GetAttribLocation || !gl_GetUniformLocation || !gl_UniformMatrix4fv || !gl_UniformMatrix3fv)
+ {
+ fprintf (stderr, "glCreateShader, glShaderSource, glCompileShader, glCreateProgram, glAttachShader, glLinkProgram, glUseProgram, glGetShaderiv, glGetShaderInfoLog, glGetProgramiv, glGetProgramInfoLog, glGetAttribLocation, glGetUniformLocation, glUniformMatrix4fv or gl_UniformMatrix3fv not found");
+ exit(1);
+ }
+}
+
+const ourGLchar *vertexShaderSource[] = {
+ "/**",
+ " * From the OpenGL Programming wikibook: http://en.wikibooks.org/wiki/GLSL_Programming/GLUT/Smooth_Specular_Highlights",
+ " * This file is in the public domain.",
+ " * Contributors: Sylvain Beucler",
+ " */",
+ "attribute vec3 fg_coord;",
+ "attribute vec3 fg_normal;",
+ "varying vec4 position; /* position of the vertex (and fragment) in world space */",
+ "varying vec3 varyingNormalDirection; /* surface normal vector in world space */",
+ "uniform mat4 m, p; /* don't need v, as always identity in our demo */",
+ "uniform mat3 m_3x3_inv_transp;",
+ " ",
+ "void main()",
+ "{",
+ " vec4 fg_coord4 = vec4(fg_coord, 1.0);",
+ " position = m * fg_coord4;",
+ " varyingNormalDirection = normalize(m_3x3_inv_transp * fg_normal);",
+ " ",
+ " mat4 mvp = p*m; /* normally p*v*m */",
+ " gl_Position = mvp * fg_coord4;",
+ "}"
+};
+
+const ourGLchar *fragmentShaderSource[] = {
+ "/**",
+ " * From the OpenGL Programming wikibook: http://en.wikibooks.org/wiki/GLSL_Programming/GLUT/Smooth_Specular_Highlights",
+ " * This file is in the public domain.",
+ " * Contributors: Martin Kraus, Sylvain Beucler",
+ " */",
+ "varying vec4 position; /* position of the vertex (and fragment) in world space */",
+ "varying vec3 varyingNormalDirection; /* surface normal vector in world space */",
+ "/* uniform mat4 v_inv; // in this demo, the view matrix is always an identity matrix */",
+ " ",
+ "struct lightSource",
+ "{",
+ " vec4 position;",
+ " vec4 diffuse;",
+ " vec4 specular;",
+ " float constantAttenuation, linearAttenuation, quadraticAttenuation;",
+ " float spotCutoff, spotExponent;",
+ " vec3 spotDirection;",
+ "};",
+ "lightSource light0 = lightSource(",
+ " vec4(2.0, 5.0, 5.0, 0.0),",
+ " vec4(1.0, 1.0, 1.0, 1.0),",
+ " vec4(1.0, 1.0, 1.0, 1.0),",
+ " 0.0, 1.0, 0.0,",
+ " 180.0, 0.0,",
+ " vec3(0.0, 0.0, 0.0)",
+ ");",
+ "vec4 scene_ambient = vec4(0.2, 0.2, 0.2, 1.0);",
+ " ",
+ "struct material",
+ "{",
+ " vec4 ambient;",
+ " vec4 diffuse;",
+ " vec4 specular;",
+ " float shininess;",
+ "};",
+ "material frontMaterial = material(",
+ " vec4(1.0, 0.0, 0.0, 1.0),",
+ " vec4(1.0, 0.0, 0.0, 1.0),",
+ " vec4(1.0, 1.0, 1.0, 1.0),",
+ " 100.0",
+ ");",
+ " ",
+ "void main()",
+ "{",
+ " vec3 normalDirection = normalize(varyingNormalDirection);",
+ " /* vec3 viewDirection = normalize(vec3(v_inv * vec4(0.0, 0.0, 0.0, 1.0) - position)); */",
+ " vec3 viewDirection = normalize(vec3(vec4(0.0, 0.0, 0.0, 1.0) - position)); /* in this demo, the view matrix is always an identity matrix */",
+ " vec3 lightDirection;",
+ " float attenuation;",
+ " ",
+ " if (0.0 == light0.position.w) /* directional light? */",
+ " {",
+ " attenuation = 1.0; /* no attenuation */",
+ " lightDirection = normalize(vec3(light0.position));",
+ " } ",
+ " else /* point light or spotlight (or other kind of light) */",
+ " {",
+ " vec3 positionToLightSource = vec3(light0.position - position);",
+ " float distance = length(positionToLightSource);",
+ " lightDirection = normalize(positionToLightSource);",
+ " attenuation = 1.0 / (light0.constantAttenuation",
+ " + light0.linearAttenuation * distance",
+ " + light0.quadraticAttenuation * distance * distance);",
+ " ",
+ " if (light0.spotCutoff <= 90.0) /* spotlight? */",
+ " {",
+ " float clampedCosine = max(0.0, dot(-lightDirection, light0.spotDirection));",
+ " if (clampedCosine < cos(radians(light0.spotCutoff))) /* outside of spotlight cone? */",
+ " {",
+ " attenuation = 0.0;",
+ " }",
+ " else",
+ " {",
+ " attenuation = attenuation * pow(clampedCosine, light0.spotExponent); ",
+ " }",
+ " }",
+ " }",
+ " ",
+ " vec3 ambientLighting = vec3(scene_ambient) * vec3(frontMaterial.ambient);",
+ " ",
+ " vec3 diffuseReflection = attenuation ",
+ " * vec3(light0.diffuse) * vec3(frontMaterial.diffuse)",
+ " * max(0.0, dot(normalDirection, lightDirection));",
+ " ",
+ " vec3 specularReflection;",
+ " if (dot(normalDirection, lightDirection) < 0.0) /* light source on the wrong side? */",
+ " {",
+ " specularReflection = vec3(0.0, 0.0, 0.0); /* no specular reflection */",
+ " }",
+ " else /* light source on the right side */",
+ " {",
+ " specularReflection = attenuation * vec3(light0.specular) * vec3(frontMaterial.specular) ",
+ " * pow(max(0.0, dot(reflect(-lightDirection, normalDirection), viewDirection)), frontMaterial.shininess);",
+ " }",
+ " ",
+ " gl_FragColor = vec4(ambientLighting + diffuseReflection + specularReflection, 1.0);",
+ "}"
+};
+
+GLint getAttribOrUniformLocation(const char* name, GLuint program, GLboolean isAttrib)
+{
+ if (isAttrib)
+ {
+ GLint attrib = gl_GetAttribLocation(program, name);
+ if (attrib == -1)
+ {
+ fprintf(stderr, "Warning: Could not bind attrib %s\n", name);
+ }
+
+ checkError ("getAttribOrUniformLocation");
+ return attrib;
+ }
+ else
+ {
+ GLint uniform = gl_GetUniformLocation(program, name);
+ if (uniform == -1)
+ {
+ fprintf(stderr, "Warning: Could not bind uniform %s\n", name);
+ }
+
+ checkError ("getAttribOrUniformLocation");
+ return uniform;
+ }
+}
+
+GLuint program;
+GLint attribute_fg_coord = -1, attribute_fg_normal = -1;
+GLint uniform_m = -1, uniform_p = -1, uniform_m_3x3_inv_transp = -1;
+GLint shaderReady = 0; /* Set to 1 when all initialization went well, to -1 when shader somehow unusable. */
+
+
+
+void compileAndCheck(GLuint shader)
+{
+ GLint status;
+ gl_CompileShader (shader);
+ gl_GetShaderiv (shader, GL_COMPILE_STATUS, &status);
+ if (status == GL_FALSE) {
+ GLint infoLogLength;
+ ourGLchar *infoLog;
+ gl_GetShaderiv (shader, GL_INFO_LOG_LENGTH, &infoLogLength);
+ infoLog = (ourGLchar*) malloc (infoLogLength);
+ gl_GetShaderInfoLog (shader, infoLogLength, NULL, infoLog);
+ fprintf (stderr, "compile log: %s\n", infoLog);
+ free (infoLog);
+ }
+ checkError ("compileAndCheck");
+}
+
+GLuint compileShaderSource(GLenum type, GLsizei count, const ourGLchar **string)
+{
+ GLuint shader = gl_CreateShader (type);
+ gl_ShaderSource (shader, count, string, NULL);
+
+ checkError ("compileShaderSource");
+
+ compileAndCheck (shader);
+ return shader;
+}
+
+void linkAndCheck(GLuint program)
+{
+ GLint status;
+ gl_LinkProgram (program);
+ gl_GetProgramiv (program, GL_LINK_STATUS, &status);
+ if (status == GL_FALSE) {
+ GLint infoLogLength;
+ ourGLchar *infoLog;
+ gl_GetProgramiv (program, GL_INFO_LOG_LENGTH, &infoLogLength);
+ infoLog = (ourGLchar*) malloc (infoLogLength);
+ gl_GetProgramInfoLog (program, infoLogLength, NULL, infoLog);
+ fprintf (stderr, "link log: %s\n", infoLog);
+ free (infoLog);
+ }
+ checkError ("linkAndCheck");
+}
+
+void createProgram(GLuint vertexShader, GLuint fragmentShader)
+{
+ program = gl_CreateProgram ();
+ if (vertexShader != 0) {
+ gl_AttachShader (program, vertexShader);
+ }
+ if (fragmentShader != 0) {
+ gl_AttachShader (program, fragmentShader);
+ }
+
+ checkError ("createProgram");
+
+ linkAndCheck (program);
+}
+
+void initShader(void)
+{
+ const GLsizei vertexShaderLines = sizeof(vertexShaderSource) / sizeof(ourGLchar*);
+ GLuint vertexShader =
+ compileShaderSource (GL_VERTEX_SHADER, vertexShaderLines, vertexShaderSource);
+
+ const GLsizei fragmentShaderLines = sizeof(fragmentShaderSource) / sizeof(ourGLchar*);
+ GLuint fragmentShader =
+ compileShaderSource (GL_FRAGMENT_SHADER, fragmentShaderLines, fragmentShaderSource);
+
+ checkError ("initShader - 1");
+
+ createProgram (vertexShader, fragmentShader);
+
+ gl_UseProgram (program);
+
+ attribute_fg_coord = getAttribOrUniformLocation("fg_coord" , program, GL_TRUE);
+ attribute_fg_normal = getAttribOrUniformLocation("fg_normal" , program, GL_TRUE);
+ uniform_m = getAttribOrUniformLocation("m" , program, GL_FALSE);
+ uniform_p = getAttribOrUniformLocation("p" , program, GL_FALSE);
+ uniform_m_3x3_inv_transp= getAttribOrUniformLocation("m_3x3_inv_transp" , program, GL_FALSE);
+
+ gl_UseProgram (0);
+
+ if (attribute_fg_coord==-1 || attribute_fg_normal==-1 ||
+ uniform_m==-1 || uniform_p==-1 || uniform_m_3x3_inv_transp==-1)
+ shaderReady = -1;
+ else
+ shaderReady = 1;
+
+ checkError ("initShader - 2");
+}
+
+/*
+ * This macro is only intended to be used on arrays, of course.
+ */
+#define NUMBEROF(x) ((sizeof(x))/(sizeof(x[0])))
+/*
+ * These global variables control which object is drawn,
+ * and how it is drawn. No object uses all of these
+ * variables.
+ */
+static int function_index;
static int slices = 16;
static int stacks = 16;
+static double irad = .25;
+static double orad = 1.0; /* doubles as size for objects other than Torus */
+static int depth = 4;
+static double offset[ 3 ] = { 0, 0, 0 };
+static GLboolean show_info = GL_TRUE;
+static float ar;
+static GLboolean persProject = GL_TRUE;
+static GLboolean animateXRot = GL_FALSE;
+static GLboolean useShader = GL_FALSE;
+static GLboolean visNormals = GL_FALSE;
+static GLboolean flat;
-/* GLUT callback Handlers */
+/*
+ * Enum to tell drawSizeInfo what to draw for each object
+ */
+#define GEO_NO_SIZE 0
+#define GEO_SIZE 1
+#define GEO_SCALE 2
+#define GEO_INNER_OUTER_RAD 4
+#define GEO_RAD 8
+#define GEO_BASE_HEIGHT 16
+#define GEO_RAD_HEIGHT 32
-static void
-resize(int width, int height)
+/*
+ * These one-liners draw particular objects, fetching appropriate
+ * information from the above globals. They are just thin wrappers
+ * for the FreeGLUT objects.
+ */
+static void drawSolidTetrahedron(void) { glutSolidTetrahedron (); }
+static void drawWireTetrahedron(void) { glutWireTetrahedron (); }
+static void drawSolidCube(void) { glutSolidCube(orad); } /* orad doubles as size input */
+static void drawWireCube(void) { glutWireCube(orad); } /* orad doubles as size input */
+static void drawSolidOctahedron(void) { glutSolidOctahedron (); }
+static void drawWireOctahedron(void) { glutWireOctahedron (); }
+static void drawSolidDodecahedron(void) { glutSolidDodecahedron (); }
+static void drawWireDodecahedron(void) { glutWireDodecahedron (); }
+static void drawSolidRhombicDodecahedron(void) { glutSolidRhombicDodecahedron (); }
+static void drawWireRhombicDodecahedron(void) { glutWireRhombicDodecahedron (); }
+static void drawSolidIcosahedron(void) { glutSolidIcosahedron (); }
+static void drawWireIcosahedron(void) { glutWireIcosahedron (); }
+static void drawSolidSierpinskiSponge(void) { glutSolidSierpinskiSponge (depth, offset, orad);} /* orad doubles as size input */
+static void drawWireSierpinskiSponge(void) { glutWireSierpinskiSponge (depth, offset, orad); } /* orad doubles as size input */
+static void drawSolidTorus(void) { glutSolidTorus(irad,orad,slices,stacks); }
+static void drawWireTorus(void) { glutWireTorus (irad,orad,slices,stacks); }
+static void drawSolidSphere(void) { glutSolidSphere(orad,slices,stacks); } /* orad doubles as size input */
+static void drawWireSphere(void) { glutWireSphere(orad,slices,stacks); } /* orad doubles as size input */
+static void drawSolidCone(void) { glutSolidCone(irad,orad,slices,stacks); } /* irad doubles as base input, and orad as height input */
+static void drawWireCone(void) { glutWireCone(irad,orad,slices,stacks); } /* irad doubles as base input, and orad as height input */
+static void drawSolidCylinder(void) { glutSolidCylinder(irad,orad,slices,stacks); } /* irad doubles as radius input, and orad as height input */
+static void drawWireCylinder(void) { glutWireCylinder(irad,orad,slices,stacks); } /* irad doubles as radius input, and orad as height input */
+/* per Glut manpage, it should be noted that the teapot is rendered
+ * with clockwise winding for front facing polygons...
+ * Same for the teacup and teaspoon
+ */
+static void drawSolidTeapot(void)
+{ glFrontFace(GL_CW); glutSolidTeapot(orad); glFrontFace(GL_CCW); /* orad doubles as size input */}
+static void drawWireTeapot(void)
+{ glFrontFace(GL_CW); glutWireTeapot(orad); glFrontFace(GL_CCW); /* orad doubles as size input */}
+static void drawSolidTeacup(void)
+{ glFrontFace(GL_CW); glutSolidTeacup(orad); glFrontFace(GL_CCW); /* orad doubles as size input */}
+static void drawWireTeacup(void)
+{ glFrontFace(GL_CW); glutWireTeacup(orad); glFrontFace(GL_CCW); /* orad doubles as size input */}
+static void drawSolidTeaspoon(void)
+{ glFrontFace(GL_CW); glutSolidTeaspoon(orad); glFrontFace(GL_CCW); /* orad doubles as size input */}
+static void drawWireTeaspoon(void)
+{ glFrontFace(GL_CW); glutWireTeaspoon(orad); glFrontFace(GL_CCW); /* orad doubles as size input */}
+
+#define RADIUSFAC 0.70710678118654752440084436210485f
+
+static void drawSolidCuboctahedron(void)
{
- const float ar = (float) width / (float) height;
-
- glViewport(0, 0, width, height);
+ GLfloat radius = RADIUSFAC*(GLfloat)orad; /* orad doubles as size */
+ glBegin( GL_TRIANGLES );
+ glNormal3d( 0.577350269189, 0.577350269189, 0.577350269189); glVertex3d( radius, radius, 0.0 ); glVertex3d( 0.0, radius, radius ); glVertex3d( radius, 0.0, radius );
+ glNormal3d( 0.577350269189, 0.577350269189,-0.577350269189); glVertex3d( radius, radius, 0.0 ); glVertex3d( radius, 0.0,-radius ); glVertex3d( 0.0, radius,-radius );
+ glNormal3d( 0.577350269189,-0.577350269189, 0.577350269189); glVertex3d( radius,-radius, 0.0 ); glVertex3d( radius, 0.0, radius ); glVertex3d( 0.0,-radius, radius );
+ glNormal3d( 0.577350269189,-0.577350269189,-0.577350269189); glVertex3d( radius,-radius, 0.0 ); glVertex3d( 0.0,-radius,-radius ); glVertex3d( radius, 0.0,-radius );
+ glNormal3d(-0.577350269189, 0.577350269189, 0.577350269189); glVertex3d(-radius, radius, 0.0 ); glVertex3d(-radius, 0.0, radius ); glVertex3d( 0.0, radius, radius );
+ glNormal3d(-0.577350269189, 0.577350269189,-0.577350269189); glVertex3d(-radius, radius, 0.0 ); glVertex3d( 0.0, radius,-radius ); glVertex3d(-radius, 0.0,-radius );
+ glNormal3d(-0.577350269189,-0.577350269189, 0.577350269189); glVertex3d(-radius,-radius, 0.0 ); glVertex3d( 0.0,-radius, radius ); glVertex3d(-radius, 0.0, radius );
+ glNormal3d(-0.577350269189,-0.577350269189,-0.577350269189); glVertex3d(-radius,-radius, 0.0 ); glVertex3d(-radius, 0.0,-radius ); glVertex3d( 0.0,-radius,-radius );
+ glEnd();
+
+ glBegin( GL_QUADS );
+ glNormal3d( 1.0, 0.0, 0.0 ); glVertex3d( radius, radius, 0.0 ); glVertex3d( radius, 0.0, radius ); glVertex3d( radius,-radius, 0.0 ); glVertex3d( radius, 0.0,-radius );
+ glNormal3d(-1.0, 0.0, 0.0 ); glVertex3d(-radius, radius, 0.0 ); glVertex3d(-radius, 0.0,-radius ); glVertex3d(-radius,-radius, 0.0 ); glVertex3d(-radius, 0.0, radius );
+ glNormal3d( 0.0, 1.0, 0.0 ); glVertex3d( radius, radius, 0.0 ); glVertex3d( 0.0, radius,-radius ); glVertex3d(-radius, radius, 0.0 ); glVertex3d( 0.0, radius, radius );
+ glNormal3d( 0.0,-1.0, 0.0 ); glVertex3d( radius,-radius, 0.0 ); glVertex3d( 0.0,-radius, radius ); glVertex3d(-radius,-radius, 0.0 ); glVertex3d( 0.0,-radius,-radius );
+ glNormal3d( 0.0, 0.0, 1.0 ); glVertex3d( radius, 0.0, radius ); glVertex3d( 0.0, radius, radius ); glVertex3d(-radius, 0.0, radius ); glVertex3d( 0.0,-radius, radius );
+ glNormal3d( 0.0, 0.0,-1.0 ); glVertex3d( radius, 0.0,-radius ); glVertex3d( 0.0,-radius,-radius ); glVertex3d(-radius, 0.0,-radius ); glVertex3d( 0.0, radius,-radius );
+ glEnd();
+}
+
+static void drawWireCuboctahedron(void)
+{
+ GLfloat radius = RADIUSFAC*(GLfloat)orad; /* orad doubles as size */
+ glBegin( GL_LINE_LOOP );
+ glNormal3d( 1.0, 0.0, 0.0 ); glVertex3d( radius, radius, 0.0 ); glVertex3d( radius, 0.0, radius ); glVertex3d( radius,-radius, 0.0 ); glVertex3d( radius, 0.0,-radius );
+ glEnd();
+ glBegin( GL_LINE_LOOP );
+ glNormal3d(-1.0, 0.0, 0.0 ); glVertex3d(-radius, radius, 0.0 ); glVertex3d(-radius, 0.0,-radius ); glVertex3d(-radius,-radius, 0.0 ); glVertex3d(-radius, 0.0, radius );
+ glEnd();
+ glBegin( GL_LINE_LOOP );
+ glNormal3d( 0.0, 1.0, 0.0 ); glVertex3d( radius, radius, 0.0 ); glVertex3d( 0.0, radius,-radius ); glVertex3d(-radius, radius, 0.0 ); glVertex3d( 0.0, radius, radius );
+ glEnd();
+ glBegin( GL_LINE_LOOP );
+ glNormal3d( 0.0,-1.0, 0.0 ); glVertex3d( radius,-radius, 0.0 ); glVertex3d( 0.0,-radius, radius ); glVertex3d(-radius,-radius, 0.0 ); glVertex3d( 0.0,-radius,-radius );
+ glEnd();
+ glBegin( GL_LINE_LOOP );
+ glNormal3d( 0.0, 0.0, 1.0 ); glVertex3d( radius, 0.0, radius ); glVertex3d( 0.0, radius, radius ); glVertex3d(-radius, 0.0, radius ); glVertex3d( 0.0,-radius, radius );
+ glEnd();
+ glBegin( GL_LINE_LOOP );
+ glNormal3d( 0.0, 0.0,-1.0 ); glVertex3d( radius, 0.0,-radius ); glVertex3d( 0.0,-radius,-radius ); glVertex3d(-radius, 0.0,-radius ); glVertex3d( 0.0, radius,-radius );
+ glEnd();
+}
+
+#undef RADIUSFAC
+
+/*
+ * This structure defines an entry in our function-table.
+ */
+typedef struct
+{
+ const char * const name;
+ void (*solid) (void);
+ void (*wire) (void);
+ int drawSizeInfoFlag;
+} entry;
+
+#define ENTRY(e,f) {#e, drawSolid##e, drawWire##e,f}
+static const entry table [] =
+{
+ ENTRY (Tetrahedron,GEO_NO_SIZE),
+ ENTRY (Cube,GEO_SIZE),
+ ENTRY (Octahedron,GEO_NO_SIZE),
+ ENTRY (Dodecahedron,GEO_NO_SIZE),
+ ENTRY (RhombicDodecahedron,GEO_NO_SIZE),
+ ENTRY (Icosahedron,GEO_NO_SIZE),
+ ENTRY (SierpinskiSponge,GEO_SCALE),
+ ENTRY (Teapot,GEO_SIZE),
+ ENTRY (Teacup,GEO_SIZE),
+ ENTRY (Teaspoon,GEO_SIZE),
+ ENTRY (Torus,GEO_INNER_OUTER_RAD),
+ ENTRY (Sphere,GEO_RAD),
+ ENTRY (Cone,GEO_BASE_HEIGHT),
+ ENTRY (Cylinder,GEO_RAD_HEIGHT),
+ ENTRY (Cuboctahedron,GEO_SIZE) /* This one doesn't work when in shader mode and is then skipped */
+};
+#undef ENTRY
+
+/*!
+ Does printf()-like work using freeglut
+ glutBitmapString(). Uses a fixed font. Prints
+ at the indicated row/column position.
+
+ Limitation: Cannot address pixels.
+ Limitation: Renders in screen coords, not model coords.
+*/
+static void shapesPrintf (int row, int col, const char *fmt, ...)
+{
+ static char buf[256];
+ int viewport[4];
+ void *font = GLUT_BITMAP_9_BY_15;
+ va_list args;
+
+ va_start(args, fmt);
+#if defined(WIN32) && !defined(__CYGWIN__)
+ (void) _vsnprintf (buf, sizeof(buf), fmt, args);
+#else
+ (void) vsnprintf (buf, sizeof(buf), fmt, args);
+#endif
+ va_end(args);
+
+ glGetIntegerv(GL_VIEWPORT,viewport);
+
+ glPushMatrix();
+ glLoadIdentity();
+
glMatrixMode(GL_PROJECTION);
+ glPushMatrix();
glLoadIdentity();
- glFrustum(-ar, ar, -1.0, 1.0, 2.0, 100.0);
-
+
+ glOrtho(0,viewport[2],0,viewport[3],-1,1);
+
+ glRasterPos2i
+ (
+ glutBitmapWidth(font, ' ') * col,
+ - glutBitmapHeight(font) * row + viewport[3]
+ );
+ glutBitmapString (font, (unsigned char*)buf);
+
+ glPopMatrix();
glMatrixMode(GL_MODELVIEW);
- glLoadIdentity() ;
+ glPopMatrix();
+}
+
+/* Print info about the about the current shape and render state on the screen */
+static void DrawSizeInfo(int *row)
+{
+ switch (table [function_index].drawSizeInfoFlag)
+ {
+ case GEO_NO_SIZE:
+ break;
+ case GEO_SIZE:
+ shapesPrintf ((*row)++, 1, "Size Up Down : %f", orad);
+ break;
+ case GEO_SCALE:
+ shapesPrintf ((*row)++, 1, "Scale Up Down : %f", orad);
+ break;
+ case GEO_INNER_OUTER_RAD:
+ shapesPrintf ((*row)++, 1, "Inner radius Left Right: %f", irad);
+ shapesPrintf ((*row)++, 1, "Outer radius Up Down : %f", orad);
+ break;
+ case GEO_RAD:
+ shapesPrintf ((*row)++, 1, "Radius Up Down : %f", orad);
+ break;
+ case GEO_BASE_HEIGHT:
+ shapesPrintf ((*row)++, 1, "Base Left Right: %f", irad);
+ shapesPrintf ((*row)++, 1, "Height Up Down : %f", orad);
+ break;
+ case GEO_RAD_HEIGHT:
+ shapesPrintf ((*row)++, 1, "Radius Left Right: %f", irad);
+ shapesPrintf ((*row)++, 1, "Height Up Down : %f", orad);
+ break;
+ }
}
-static void
-display(void)
+static void drawInfo()
+{
+ int row = 1;
+ shapesPrintf (row++, 1, "Shape PgUp PgDn: %s", table [function_index].name);
+ shapesPrintf (row++, 1, "Slices +-: %d Stacks <>: %d", slices, stacks);
+ shapesPrintf (row++, 1, "nSides +-: %d nRings <>: %d", slices, stacks);
+ shapesPrintf (row++, 1, "Depth (): %d", depth);
+ DrawSizeInfo(&row);
+ if (persProject)
+ shapesPrintf (row++, 1, "Perspective projection (p)");
+ else
+ shapesPrintf (row++, 1, "Orthographic projection (p)");
+ if (useShader) {
+ shapesPrintf (row++, 1, "Using shader (s)");
+ } else {
+ shapesPrintf (row++, 1, "Using fixed function pipeline (s)");
+ if (flat)
+ shapesPrintf (row++, 1, "Flat shading (f)");
+ else
+ shapesPrintf (row++, 1, "Smooth shading (f)");
+ }
+ if (animateXRot)
+ shapesPrintf (row++, 1, "2D rotation (r)");
+ else
+ shapesPrintf (row++, 1, "1D rotation (r)");
+ shapesPrintf (row++, 1, "visualizing normals: %i (n)",visNormals);
+}
+
+/* GLUT callback Handlers */
+static void
+resize(int width, int height)
+{
+ ar = (float) width / (float) height;
+
+ glViewport(0, 0, width, height);
+}
+
+static void display(void)
{
const double t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
- const double a = t*90.0;
+ const double a = t*89.0;
+ const double b = (animateXRot?t:1)*67.0;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- glColor3d(1,0,0);
- glPushMatrix();
- glTranslated(-2.4,1.2,-6);
- glRotated(60,1,0,0);
- glRotated(a,0,0,1);
- glutSolidSphere(1,slices,stacks);
- glPopMatrix();
+ glutSetOption(GLUT_GEOMETRY_VISUALIZE_NORMALS,visNormals); /* Normals visualized or not? */
- glPushMatrix();
- glTranslated(0,1.2,-6);
- glRotated(60,1,0,0);
- glRotated(a,0,0,1);
- glutSolidCone(1,1,slices,stacks);
- glPopMatrix();
+ glShadeModel(flat ? GL_FLAT : GL_SMOOTH); /* flat or gouraud shading */
- glPushMatrix();
- glTranslated(2.4,1.2,-6);
- glRotated(60,1,0,0);
- glRotated(a,0,0,1);
- glutSolidTorus(0.2,0.8,slices,stacks);
- glPopMatrix();
-
- glPushMatrix();
- glTranslated(-2.4,-1.2,-6);
- glRotated(60,1,0,0);
- glRotated(a,0,0,1);
- glutWireSphere(1,slices,stacks);
- glPopMatrix();
+ if (useShader && !shaderReady)
+ initShader();
- glPushMatrix();
- glTranslated(0,-1.2,-6);
- glRotated(60,1,0,0);
- glRotated(a,0,0,1);
- glutWireCone(1,1,slices,stacks);
- glPopMatrix();
+ if (useShader && shaderReady)
+ {
+ /* setup use of shader (and vertex buffer by FreeGLUT) */
+ gl_UseProgram (program);
+ glutSetVertexAttribCoord3(attribute_fg_coord);
+ glutSetVertexAttribNormal(attribute_fg_normal);
+ /* There is also a glutSetVertexAttribTexCoord2, which is used only when drawing the teapot, teacup or teaspoon */
+
+ gl_matrix_mode(GL_PROJECTION);
+ gl_load_identity();
+ if (persProject)
+ gl_frustum(-ar, ar, -1.f, 1.f, 2.f, 100.f);
+ else
+ gl_ortho(-ar*3, ar*3, -3.f, 3.f, 2.f, 100.f);
+ gl_UniformMatrix4fv (uniform_p, 1, GL_FALSE, get_matrix(GL_PROJECTION));
+
+
+ gl_matrix_mode(GL_MODELVIEW);
+ gl_load_identity();
+
+ gl_push_matrix();
+ /* Not in reverse order like normal OpenGL, our util library multiplies the matrices in the order they are specified in */
+ gl_rotatef((float)a,0,0,1);
+ gl_rotatef((float)b,1,0,0);
+ gl_translatef(0,1.2f,-6);
+ gl_UniformMatrix4fv (uniform_m , 1, GL_FALSE, get_matrix(GL_MODELVIEW));
+ gl_UniformMatrix3fv (uniform_m_3x3_inv_transp, 1, GL_FALSE, get_inv_transpose_3x3(GL_MODELVIEW));
+ table [function_index].solid ();
+ gl_pop_matrix();
+
+ gl_push_matrix();
+ gl_rotatef((float)a,0,0,1);
+ gl_rotatef((float)b,1,0,0);
+ gl_translatef(0,-1.2f,-6);
+ gl_UniformMatrix4fv (uniform_m , 1, GL_FALSE, get_matrix(GL_MODELVIEW));
+ gl_UniformMatrix3fv (uniform_m_3x3_inv_transp, 1, GL_FALSE, get_inv_transpose_3x3(GL_MODELVIEW));
+ table [function_index].wire ();
+ gl_pop_matrix();
+
+ gl_UseProgram (0);
+ glutSetVertexAttribCoord3(-1);
+ glutSetVertexAttribNormal(-1);
+
+ checkError ("display");
+ }
+ else
+ {
+ /* fixed function pipeline */
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ if (persProject)
+ glFrustum(-ar, ar, -1.0, 1.0, 2.0, 100.0);
+ else
+ glOrtho(-ar*3, ar*3, -3.0, 3.0, 2.0, 100.0);
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+
+ glEnable(GL_LIGHTING);
+
+ glColor3d(1,0,0);
+
+ glPushMatrix();
+ glTranslated(0,1.2,-6);
+ glRotated(b,1,0,0);
+ glRotated(a,0,0,1);
+ table [function_index].solid ();
+ glPopMatrix();
+
+ glPushMatrix();
+ glTranslated(0,-1.2,-6);
+ glRotated(b,1,0,0);
+ glRotated(a,0,0,1);
+ table [function_index].wire ();
+ glPopMatrix();
+
+ glDisable(GL_LIGHTING);
+ glColor3d(0.1,0.1,0.4);
+ }
- glPushMatrix();
- glTranslated(2.4,-1.2,-6);
- glRotated(60,1,0,0);
- glRotated(a,0,0,1);
- glutWireTorus(0.2,0.8,slices,stacks);
- glPopMatrix();
+ if( show_info )
+ /* print info to screen */
+ drawInfo();
+ else
+ /* print to command line instead */
+ printf ( "Shape %d slides %d stacks %d\n", function_index, slices, stacks ) ;
glutSwapBuffers();
}
-static void
+static void
key(unsigned char key, int x, int y)
{
- switch (key)
+ switch (key)
{
- case 'n': glDisable ( GL_CULL_FACE ) ;
- break ;
- case 'f': glEnable ( GL_CULL_FACE ) ;
- glCullFace ( GL_FRONT ) ;
- break ;
- case 'b': glEnable ( GL_CULL_FACE ) ;
- glCullFace ( GL_BACK ) ;
- break ;
- case 27 :
- case 'q':
- exit(0);
- break;
-
- case '+':
- slices++;
- stacks++;
- break;
-
- case '-':
- if (slices>3 && stacks>3)
- {
- slices--;
- stacks--;
- }
- break;
+ case 27 :
+ case 'Q':
+ case 'q': glutLeaveMainLoop () ; break;
+
+ case 'I':
+ case 'i': show_info=!show_info; break;
+
+ case '=':
+ case '+': slices++; break;
+
+ case '-':
+ case '_': if( slices > -1 ) slices--; break;
+
+ case ',':
+ case '<': if( stacks > -1 ) stacks--; break;
+
+ case '.':
+ case '>': stacks++; break;
+
+ case '9':
+ case '(': if( depth > -1 ) depth--; break;
+
+ case '0':
+ case ')': ++depth; break;
+
+ case 'P':
+ case 'p': persProject=!persProject; break;
+
+ case 'R':
+ case 'r': animateXRot=!animateXRot; break;
+
+ case 'S':
+ case 's':
+ useShader=!useShader;
+ /* Cuboctahedron can't be shown when in shader mode, move to next */
+ if (useShader && NUMBEROF (table)-1 == ( unsigned )function_index)
+ function_index = 0;
+ break;
+
+ case 'F':
+ case 'f':
+ flat ^= 1;
+ break;
+
+ case 'N':
+ case 'n': visNormals=!visNormals; break;
+
+ default:
+ break;
}
glutPostRedisplay();
}
-static void
+static void special (int key, int x, int y)
+{
+ switch (key)
+ {
+ case GLUT_KEY_PAGE_UP: ++function_index; break;
+ case GLUT_KEY_PAGE_DOWN: --function_index; break;
+ case GLUT_KEY_UP: orad *= 2; break;
+ case GLUT_KEY_DOWN: orad /= 2; break;
+
+ case GLUT_KEY_RIGHT: irad *= 2; break;
+ case GLUT_KEY_LEFT: irad /= 2; break;
+
+ default:
+ break;
+ }
+
+ if (0 > function_index)
+ function_index = NUMBEROF (table) - 1;
+
+ if (NUMBEROF (table) <= ( unsigned )function_index)
+ function_index = 0;
+
+ /* Cuboctahedron can't be shown when in shader mode, skip it */
+ if (useShader && NUMBEROF (table)-1 == ( unsigned )function_index)
+ {
+ if (key==GLUT_KEY_PAGE_UP)
+ function_index = 0;
+ else
+ function_index -= 1;
+ }
+}
+
+
+static void
idle(void)
{
glutPostRedisplay();
/* Program entry point */
-int
+int
main(int argc, char *argv[])
{
+ glutInitWindowSize(800,600);
+ glutInitWindowPosition(40,40);
glutInit(&argc, argv);
- glutInitWindowSize(640,480);
- glutInitWindowPosition (40,40);
- glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+ glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_MULTISAMPLE);
glutCreateWindow("FreeGLUT Shapes");
glutReshapeFunc(resize);
glutDisplayFunc(display);
glutKeyboardFunc(key);
+ glutSpecialFunc(special);
glutIdleFunc(idle);
+ glutSetOption ( GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_CONTINUE_EXECUTION ) ;
+
glClearColor(1,1,1,1);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glEnable(GL_LIGHT0);
glEnable(GL_NORMALIZE);
glEnable(GL_COLOR_MATERIAL);
- glEnable(GL_LIGHTING);
glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
+ initExtensionEntries();
+
glutMainLoop();
+#ifdef _MSC_VER
+ /* DUMP MEMORY LEAK INFORMATION */
+ _CrtDumpMemoryLeaks () ;
+#endif
+
return EXIT_SUCCESS;
}
-
projects / freeglut / blobdiff