X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=progs%2Fdemos%2Fshapes%2Fshapes.c;h=a9e43a6219edd9fc5ac0211206b5105dd50b9760;hb=eb77fc0d5d0e75c0ddde3396bc6850c5e018b988;hp=271ea04c0ee551751420a102323f73d4b0f8df63;hpb=b38f7bf82ab934dce11fbfdd21ca32da72f73c6a;p=freeglut diff --git a/progs/demos/shapes/shapes.c b/progs/demos/shapes/shapes.c index 271ea04..a9e43a6 100644 --- a/progs/demos/shapes/shapes.c +++ b/progs/demos/shapes/shapes.c @@ -43,11 +43,361 @@ #include #include +#include "glmatrix.h" + #ifdef _MSC_VER /* DUMP MEMORY LEAKS */ #include #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_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); +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"); +} + +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); + } + + return attrib; + } + else + { + GLint uniform = gl_GetUniformLocation(program, name); + if (uniform == -1) + { + fprintf(stderr, "Warning: Could not bind uniform %s\n", name); + } + + return uniform; + } + checkError ("getAttribOrUniformLocation"); +} + +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. */ @@ -69,6 +419,8 @@ 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; /* * These one-liners draw particular objects, fetching appropriate @@ -116,54 +468,56 @@ static void drawWireTeapot(void) glFrontFace(GL_CCW); } -#define RADIUS 1.0f +#define RADIUSFAC 0.70710678118654752440084436210485f static void drawSolidCuboctahedron(void) { + 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 ); + 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 ); + 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 ); + 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 ); + 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 ); + 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 ); + 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 ); + 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 ); + 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 RADIUS +#undef RADIUSFAC /* * This structure defines an entry in our function-table. @@ -190,7 +544,7 @@ static const entry table [] = ENTRY (Sphere), ENTRY (Cone), ENTRY (Cylinder), - ENTRY (Cuboctahedron) + ENTRY (Cuboctahedron) /* This one doesn't work when in shader mode and is then skipped */ }; #undef ENTRY @@ -253,40 +607,93 @@ resize(int width, int height) static void display(void) { const double t = glutGet(GLUT_ELAPSED_TIME) / 1000.0; - const double a = t*90.0; - const double b = (animateXRot?t:1)*60.0; - - 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(); + const double a = t*89.0; + const double b = (animateXRot?t:1)*67.0; glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - 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(); + glutSetOption(GLUT_OBJECTS_VISUALIZE_NORMALS,visNormals); /* Normals visualized or not? */ - glPushMatrix(); - glTranslated(0,-1.2,-6); - glRotated(b,1,0,0); - glRotated(a,0,0,1); - table [function_index].wire (); - glPopMatrix(); + if (useShader && !shaderReady) + initShader(); - glDisable(GL_LIGHTING); - glColor3d(0.1,0.1,0.4); + if (useShader && shaderReady) + { + /* setup use of shader (and vertex buffer by FreeGLUT) */ + gl_UseProgram (program); + glutSetVertexAttribCoord3(attribute_fg_coord); + glutSetVertexAttribNormal(attribute_fg_normal); + + 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); + } if( show_info ) { shapesPrintf (1, 1, "Shape PgUp PgDn: %s", table [function_index].name); @@ -295,7 +702,21 @@ static void display(void) 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)"); + shapesPrintf (10, 1, "visualizing normals: %i (n)",visNormals); } else { + /* print to command line instead */ printf ( "Shape %d slides %d stacks %d\n", function_index, slices, stacks ) ; } @@ -313,7 +734,7 @@ key(unsigned char key, int x, int y) case 'q': glutLeaveMainLoop () ; break; case 'I': - case 'i': show_info = ( show_info == GL_TRUE ) ? GL_FALSE : GL_TRUE; break; + case 'i': show_info=!show_info; break; case '=': case '+': slices++; break; @@ -339,6 +760,17 @@ key(unsigned char key, int x, int y) 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 'N': + case 'n': visNormals=!visNormals; break; + default: break; } @@ -367,6 +799,13 @@ static void special (int key, int x, int y) 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; } @@ -391,7 +830,7 @@ const GLfloat high_shininess[] = { 100.0f }; int main(int argc, char *argv[]) { - glutInitWindowSize(640,480); + glutInitWindowSize(800,600); glutInitWindowPosition(40,40); glutInit(&argc, argv); glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_MULTISAMPLE); @@ -427,6 +866,8 @@ main(int argc, char *argv[]) glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular); glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess); + initExtensionEntries(); + glutMainLoop(); #ifdef _MSC_VER