X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=progs%2Fdemos%2Fshapes%2Fshapes.c;h=69c0a1a94da8ee20a70dedfefc7adb3b9b7f1281;hb=b1ed93dd348f7b8f3bd2c75474f5d4151d502f1f;hp=ef329881a3f6acba314f4ed60696cb7b3226d017;hpb=3a5df7e8d5491543374a287064a8b0430f8b715e;p=freeglut diff --git a/progs/demos/shapes/shapes.c b/progs/demos/shapes/shapes.c index ef32988..69c0a1a 100644 --- a/progs/demos/shapes/shapes.c +++ b/progs/demos/shapes/shapes.c @@ -5,16 +5,18 @@ 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: - Esc   Quit - q Q   Quit - i I   Show info - p P   Toggle perspective or orthographic projection - r R   Toggle fixed or animated rotation around model X-axis + - s S   Toggle toggle fixed function or shader render path + - n N   Toggle visualization of object's normal vectors - = +   Increase \a slices - - _   Decreate \a slices - , <   Decreate \a stacks @@ -32,7 +34,7 @@ \author Portions Copyright (C) 2004, the OpenGLUT project contributors.
OpenGLUT branched from freeglut in February, 2004. - + \image html openglut_shapes.png OpenGLUT Geometric Shapes Demonstration \include demos/shapes/shapes.c */ @@ -42,6 +44,7 @@ #include #include #include +#include #include "glmatrix.h" @@ -60,7 +63,7 @@ void checkError(const char *functionName) } /* - * OpenGL 2+ shader mode needs some function and macro definitions, + * OpenGL 2+ shader mode needs some function and macro definitions, * avoiding a dependency on additional libraries like GLEW or the * GL/glext.h header */ @@ -91,11 +94,6 @@ typedef char ourGLchar; #define APIENTRY #endif -#ifndef GL_VERSION_1_5 -typedef void (APIENTRY *PFNGLGENBUFFERSPROC) (GLsizei n, GLuint *buffers); -typedef void (APIENTRY *PFNGLBINDBUFFERPROC) (GLenum target, GLuint buffer); -typedef void (APIENTRY *PFNGLBUFFERDATAPROC) (GLenum target, ourGLsizeiptr size, const GLvoid *data, GLenum usage); -#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); @@ -147,6 +145,11 @@ void initExtensionEntries(void) 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[] = { @@ -280,9 +283,10 @@ GLint getAttribOrUniformLocation(const char* name, GLuint program, GLboolean isA GLint attrib = gl_GetAttribLocation(program, name); if (attrib == -1) { - fprintf(stderr, "Warning: Could not bind attrib %s\n", name); + fprintf(stderr, "Warning: Could not bind attrib %s\n", name); } + checkError ("getAttribOrUniformLocation"); return attrib; } else @@ -290,16 +294,16 @@ GLint getAttribOrUniformLocation(const char* name, GLuint program, GLboolean isA GLint uniform = gl_GetUniformLocation(program, name); if (uniform == -1) { - fprintf(stderr, "Warning: Could not bind uniform %s\n", name); + fprintf(stderr, "Warning: Could not bind uniform %s\n", name); } + checkError ("getAttribOrUniformLocation"); return uniform; } - checkError ("getAttribOrUniformLocation"); } GLuint program; -GLint attribute_fg_coord = -1, attribute_fg_normal = -1; +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. */ @@ -423,6 +427,17 @@ static GLboolean useShader = GL_FALSE; static GLboolean visNormals = GL_FALSE; /* + * 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 + +/* * These one-liners draw particular objects, fetching appropriate * information from the above globals. They are just thin wrappers * for the FreeGLUT objects. @@ -445,28 +460,26 @@ static void drawSolidTorus(void) { glutSolidTorus(irad,orad,slices 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(orad,orad,slices,stacks); } /* orad doubles as size input */ -static void drawWireCone(void) { glutWireCone(orad,orad,slices,stacks); } /* orad doubles as size input */ -static void drawSolidCylinder(void) { glutSolidCylinder(orad,orad,slices,stacks); } /* orad doubles as size input */ -static void drawWireCylinder(void) { glutWireCylinder(orad,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) -{ - /* per Glut manpage, it should be noted that the teapot is rendered - * with clockwise winding for front facing polygons... - */ - glFrontFace(GL_CW); - glutSolidTeapot(orad); /* orad doubles as size input */ - glFrontFace(GL_CCW); -} +{ glFrontFace(GL_CW); glutSolidTeapot(orad); glFrontFace(GL_CCW); /* orad doubles as size input */} static void drawWireTeapot(void) -{ - /* per Glut manpage, it should be noted that the teapot is rendered - * with clockwise winding for front facing polygons... - */ - glFrontFace(GL_CW); - glutWireTeapot(orad); /* orad doubles as size input */ - glFrontFace(GL_CCW); -} +{ 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 @@ -527,24 +540,27 @@ typedef struct const char * const name; void (*solid) (void); void (*wire) (void); + int drawSizeInfoFlag; } entry; -#define ENTRY(e) {#e, drawSolid##e, drawWire##e} +#define ENTRY(e,f) {#e, drawSolid##e, drawWire##e,f} static const entry table [] = { - ENTRY (Tetrahedron), - ENTRY (Cube), - ENTRY (Octahedron), - ENTRY (Dodecahedron), - ENTRY (RhombicDodecahedron), - ENTRY (Icosahedron), - ENTRY (SierpinskiSponge), - ENTRY (Teapot), - ENTRY (Torus), - ENTRY (Sphere), - ENTRY (Cone), - ENTRY (Cylinder), - ENTRY (Cuboctahedron) /* This one doesn't work when in shader mode and is then skipped */ + 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 @@ -594,8 +610,61 @@ static void shapesPrintf (int row, int col, const char *fmt, ...) glPopMatrix(); } -/* GLUT callback Handlers */ +/* 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 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 (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) { @@ -612,6 +681,8 @@ static void display(void) glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + glutSetOption(GLUT_GEOMETRY_VISUALIZE_NORMALS,visNormals); /* Normals visualized or not? */ + if (useShader && !shaderReady) initShader(); @@ -621,6 +692,7 @@ static void display(void) 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(); @@ -662,7 +734,6 @@ static void display(void) else { /* fixed function pipeline */ - glutSetOption(GLUT_OBJECTS_VISUALIZE_NORMALS,visNormals); /* Normals visualized or not? */ glMatrixMode(GL_PROJECTION); glLoadIdentity(); if (persProject) @@ -694,31 +765,12 @@ static void display(void) glColor3d(0.1,0.1,0.4); } - if( show_info ) { - shapesPrintf (1, 1, "Shape PgUp PgDn: %s", table [function_index].name); - shapesPrintf (2, 1, "Slices +-: %d Stacks <>: %d", slices, stacks); - shapesPrintf (3, 1, "nSides +-: %d nRings <>: %d", slices, stacks); - shapesPrintf (4, 1, "Depth (): %d", depth); - shapesPrintf (5, 1, "Outer radius Up Down : %f", orad); - shapesPrintf (6, 1, "Inner radius Left Right: %f", irad); - if (persProject) - shapesPrintf (7, 1, "Perspective projection (p)"); - else - shapesPrintf (7, 1, "Orthographic projection (p)"); - if (useShader) - shapesPrintf (8, 1, "Using shader (s)"); - else - shapesPrintf (8, 1, "Using fixed function pipeline (s)"); - if (animateXRot) - shapesPrintf (9, 1, "2D rotation (r)"); - else - shapesPrintf (9, 1, "1D rotation (r)"); - if (!useShader) - shapesPrintf (10, 1, "visualizing normals: %i (n)",visNormals); - } else { + 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(); } @@ -748,10 +800,10 @@ key(unsigned char key, int x, int y) case '.': case '>': stacks++; break; - case '9': + case '9': case '(': if( depth > -1 ) depth--; break; - case '0': + case '0': case ')': ++depth; break; case 'P': @@ -802,10 +854,12 @@ static void special (int key, int x, int y) /* 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; + } }