From 2b29d6b81b8e20fc6c903fe839abbb833c5f18bd Mon Sep 17 00:00:00 2001 From: Kyle K Date: Thu, 7 Jul 2011 23:14:03 -0500 Subject: create a gldraw.[ch] for models, also introduce few functions --- sdl/gltools.c | 574 ++++++++-------------------------------------------------- 1 file changed, 75 insertions(+), 499 deletions(-) (limited to 'sdl/gltools.c') diff --git a/sdl/gltools.c b/sdl/gltools.c index 2c2c0c4..afb0777 100644 --- a/sdl/gltools.c +++ b/sdl/gltools.c @@ -2,18 +2,74 @@ * * OpenGL Tools * - * notes: some function modify current color, just FYI * */ #include -#include -#include #include #include -#include "math3d.h" +#include #include "gltools.h" +void gltListExtensions(void) +{ + const GLubyte *ext_str; + char *ext_str_copy; + + ext_str = glGetString(GL_EXTENSIONS); + if (!ext_str) + return; + + ext_str_copy = (char *) malloc(strlen((char *) ext_str) + 1); + if (!ext_str_copy) + { + fprintf(stderr, "gltListExtensions failed, %s:%d\n", __FILE__, __LINE__); + perror("malloc"); + exit(-1); + } + + strcpy(ext_str_copy, (char *) ext_str); + + char *tok; + while ((tok = strsep(&ext_str_copy, " "))) + printf("%s\n", tok); + + if (ext_str_copy) + free(ext_str_copy); +} + +void gltOpenGLInfo(void) +{ + const GLubyte *str; + + str = glGetString(GL_VENDOR); + fprintf(stdout, "OpenGL vendor: %s\n", str ? (char *) str : "unknown"); + str = glGetString(GL_RENDERER); + fprintf(stdout, "OpenGL renderer: %s\n", str ? (char *) str : "unknown"); + str = glGetString(GL_VERSION); + fprintf(stdout, "OpenGL version: %s\n", str ? (char *) str : "unknown"); + str = glGetString(GL_SHADING_LANGUAGE_VERSION); + fprintf(stdout, "GLSL version: %s\n", str ? (char *) str : "unknown"); +} + +GLboolean gltQueryExtension(const char *extName) +{ + char *p = (char *) glGetString(GL_EXTENSIONS); + char *end = p + strlen(p); + + while (p < end) + { + int n = strcspn(p, " "); + + if ((strlen(extName) == n) && (strncmp(extName, p, n) == 0)) + return GL_TRUE; + + p += (n + 1); + } + + return GL_FALSE; +} + GLint gltWriteTGA(const char *szFileName) { FILE *pFile; /* file pointer */ @@ -171,506 +227,26 @@ GLbyte *gltLoadTGA(const char *szFileName, GLint *iWidth, GLint *iHeight, return pBits; } -void gltDrawSnowman(void) -{ - GLUquadricObj *pObj; /* quadric object */ - - /* main body */ - glPushMatrix(); - pObj = gluNewQuadric(); - gluQuadricNormals(pObj, GLU_SMOOTH); - - glPushMatrix(); - glColor3f(1.0f, 1.0f, 1.0f); - gluSphere(pObj, .40f, 26, 13); /* bottom */ - - /* mid section */ - glTranslatef(0.0f, .550f, 0.0f); - gluSphere(pObj, .3f, 26, 13); - - /* head */ - glTranslatef(0.0f, 0.45f, 0.0f); - gluSphere(pObj, 0.24f, 26, 13); - - /* eyes */ - glColor3f(0.0f, 0.0f, 0.0f); - glTranslatef(0.1f, 0.1f, 0.21f); - gluSphere(pObj, 0.02f, 26, 13); - - glTranslatef(-0.2f, 0.0f, 0.0f); - gluSphere(pObj, 0.02f, 26, 13); - - /* nose */ - glColor3f(1.0f, 0.3f, 0.3f); - glTranslatef(0.1f, -0.12f, 0.0f); - gluCylinder(pObj, 0.04f, 0.0f, 0.3f, 26, 13); - glPopMatrix(); - - /* hat */ - glPushMatrix(); - glColor3f(0.0f, 0.0f, 0.0f); - glTranslatef(0.0f, 1.17f, 0.0f); - glRotatef(-90.0f, 1.0f, 0.0f, 0.0f); - gluCylinder(pObj, 0.17f, 0.17f, 0.4f, 26, 13); - - /* hat brim */ - glDisable(GL_CULL_FACE); - gluDisk(pObj, 0.17f, 0.28f, 26, 13); - glEnable(GL_CULL_FACE); - - glTranslatef(0.0f, 0.0f, 0.40f); - gluDisk(pObj, 0.0f, 0.17f, 26, 13); - glPopMatrix(); - glPopMatrix(); - - /* delete the quadric */ - gluDeleteQuadric(pObj); -} - -/* this screws up the rendering, possibly becasue it's glut? */ -void gltDrawFigures(void) -{ - glDisable(GL_TEXTURE_2D); - glDisable(GL_LIGHTING); - glPushMatrix(); - /* scale the figures */ - glScalef(0.02f, 0.02f, 0.02f); - - /* draw red cube */ - glColor3f(1.0f, 0.0f, 0.0f); - glPushMatrix(); - glutSolidCube(48.0f); - glPopMatrix(); - - /* draw green sphere */ - glColor3f(0.0f, 1.0f, 0.0f); - glPushMatrix(); - glTranslatef(-60.0f, 0.0f, 0.0f); - glutSolidSphere(25.0f, 50, 50); - glPopMatrix(); - - /* draw magenta torus */ - glColor3f(1.0f, 0.0f, 1.0f); - glPushMatrix(); - glTranslatef(0.0f, 0.0f, 60.0f); - glutSolidTorus(8.0f, 16.0f, 50, 50); - glPopMatrix(); - - /* draw yellow cone */ - glColor3f(1.0f, 1.0f, 0.0f); - glPushMatrix(); - glRotatef(-90.0f, 1.0f, 0.0f, 0.0f); - glTranslatef(60.0f, 0.0f, -24.0f); - glutSolidCone(25.0f, 50.0f, 50, 50); - glPopMatrix(); - - /* draw cyan teapot */ - glColor3f(0.0f, 1.0f, 1.0f); - glPushMatrix(); - glTranslatef(0.0f, 0.0f, -60.0f); - glutSolidTeapot(25.0f); - glPopMatrix(); - glPopMatrix(); - glEnable(GL_LIGHTING); - glEnable(GL_TEXTURE_2D); -} - -void gltDrawTriangle(void) -{ - M3DVector3f vNormal; - M3DVector3f vCorners[5] = { - { 0.0f, 0.6f, 0.0f }, /* top 0 */ - { -0.5f, -0.2f, -.50f }, /* back left 1 */ - { 0.5f, -0.2f, -0.50f }, /* back right 2 */ - { 0.5f, -0.2f, 0.5f }, /* front right 3 */ - { -0.5f, -0.2f, 0.5f } /* front left 4 */ - }; - - glBegin(GL_TRIANGLES); - /* bottom section - two triangles */ - glNormal3f(0.0f, -1.0f, 0.0f); - - /* map texture to geometry */ - glTexCoord2f(1.0f, 1.0f); - glVertex3fv(vCorners[2]); - glTexCoord2f(0.0f, 1.0f); - glVertex3fv(vCorners[4]); - glTexCoord2f(0.0f, 0.0f); - glVertex3fv(vCorners[1]); - glTexCoord2f(1.0f, 1.0f); - glVertex3fv(vCorners[2]); - glTexCoord2f(1.0f, 0.0f); - glVertex3fv(vCorners[3]); - glTexCoord2f(0.0f, 0.0f); - glVertex3fv(vCorners[4]); - - /* front face */ - m3dFindNormalf(vNormal, vCorners[0], vCorners[4], vCorners[3]); - glNormal3fv(vNormal); - glTexCoord2f(0.5f, 1.0f); - glVertex3fv(vCorners[0]); - glTexCoord2f(0.0f, 0.0f); - glVertex3fv(vCorners[4]); - glTexCoord2f(1.0f, 0.0f); - glVertex3fv(vCorners[3]); - - /* left face */ - m3dFindNormalf(vNormal, vCorners[0], vCorners[1], vCorners[4]); - glNormal3fv(vNormal); - glTexCoord2f(0.5f, 1.0f); - glVertex3fv(vCorners[0]); - glTexCoord2f(0.0f, 0.0f); - glVertex3fv(vCorners[1]); - glTexCoord2f(1.0f, 0.0f); - glVertex3fv(vCorners[4]); - - /* back face */ - m3dFindNormalf(vNormal, vCorners[0], vCorners[2], vCorners[1]); - glNormal3fv(vNormal); - glTexCoord2f(0.5f, 1.0f); - glVertex3fv(vCorners[0]); - glTexCoord2f(0.0f, 0.0f); - glVertex3fv(vCorners[2]); - glTexCoord2f(1.0f, 0.0f); - glVertex3fv(vCorners[1]); - - /* right face */ - m3dFindNormalf(vNormal, vCorners[0], vCorners[3], vCorners[2]); - glNormal3fv(vNormal); - glTexCoord2f(0.5f, 1.0f); - glVertex3fv(vCorners[0]); - glTexCoord2f(0.0f, 0.0f); - glVertex3fv(vCorners[3]); - glTexCoord2f(1.0f, 0.0f); - glVertex3fv(vCorners[2]); - glEnd(); -} - -void gltDrawGround(void) -{ - GLfloat fExtent = 20.0f; - GLfloat fStep = 0.5f; - GLfloat y = -0.4f; - GLfloat iLine; - - glLineWidth(1.0f); - glBegin(GL_LINES); - for (iLine = -fExtent; iLine <= fExtent; iLine += fStep) - { - glVertex3f(iLine, y, fExtent); - glVertex3f(iLine, y, -fExtent); - glVertex3f(fExtent, y, iLine); - glVertex3f(-fExtent, y, iLine); - } - glEnd(); -} - -void gltDrawUnitAxes(void) -{ - GLUquadricObj *pObj; /* temporary, used for quadrics */ - - /* measurements */ - float fAxisRadius = 0.025f; - float fAxisHeight = 1.0f; - float fArrowRadius = 0.06f; - float fArrowHeight = 0.1f; - - /* setup the quadric object */ - pObj = gluNewQuadric(); - gluQuadricDrawStyle(pObj, GLU_FILL); - gluQuadricNormals(pObj, GLU_SMOOTH); - gluQuadricOrientation(pObj, GLU_OUTSIDE); - gluQuadricTexture(pObj, GLU_FALSE); - - /* draw the blue z axis first with arrowed head */ - glColor3f(0.0f, 0.0f, 1.0f); - gluCylinder(pObj, fAxisRadius, fAxisRadius, fAxisHeight, 10, 1); - glPushMatrix(); - glTranslatef(0.0f, 0.0f, 1.0f); - gluCylinder(pObj, fArrowRadius, 0.0f, fArrowHeight, 10, 1); - glRotatef(180.0f, 1.0f, 0.0f, 0.0f); - gluDisk(pObj, fAxisRadius, fArrowRadius, 10, 1); - glPopMatrix(); - - /* draw the red x axis 2nd with arrowed head */ - glColor3f(1.0f, 0.0f, 0.0f); - glPushMatrix(); - glRotatef(90.0f, 0.0f, 1.0f, 0.0f); - gluCylinder(pObj, fAxisRadius, fAxisRadius, fAxisHeight, 10, 1); - glPushMatrix(); - glTranslatef(0.0f, 0.0f, 1.0f); - gluCylinder(pObj, fArrowRadius, 0.0f, fArrowHeight, 10, 1); - glRotatef(180.0f, 0.0f, 1.0f, 0.0f); - gluDisk(pObj, fAxisRadius, fArrowRadius, 10, 1); - glPopMatrix(); - glPopMatrix(); - - /* draw the green y axis 3rd with arrowed head */ - glColor3f(0.0f, 1.0f, 0.0f); - glPushMatrix(); - glRotatef(-90.0f, 1.0f, 0.0f, 0.0f); - gluCylinder(pObj, fAxisRadius, fAxisRadius, fAxisHeight, 10, 1); - glPushMatrix(); - glTranslatef(0.0f, 0.0f, 1.0f); - gluCylinder(pObj, fArrowRadius, 0.0f, fArrowHeight, 10, 1); - glRotatef(180.0f, 1.0f, 0.0f, 0.0f); - gluDisk(pObj, fAxisRadius, fArrowRadius, 10, 1); - glPopMatrix(); - glPopMatrix(); - - /* white sphere at origin */ - glColor3f(1.0f, 1.0f, 1.0f); - gluSphere(pObj, 0.05f, 15, 15); - - /* delete the quadric */ - gluDeleteQuadric(pObj); -} - -/* draw a torus (doughnut), using the current 1d texture for light shading */ -void gltDrawTorus(GLfloat majorRadius, GLfloat minorRadius, GLint numMajor, - GLint numMinor) -{ - M3DVector3f vNormal; - double majorStep = 2.0f * M3D_PI / numMajor; - double minorStep = 2.0f * M3D_PI / numMinor; - int i, j; - - for (i = 0; i < numMajor; ++i) - { - double a0 = i * majorStep; - double a1 = a0 + majorStep; - GLfloat x0 = (GLfloat) cos(a0); - GLfloat y0 = (GLfloat) sin(a0); - GLfloat x1 = (GLfloat) cos(a1); - GLfloat y1 = (GLfloat) sin(a1); - - glBegin(GL_TRIANGLE_STRIP); - for (j = 0; j <= numMinor; ++j) - { - double b = j * minorStep; - GLfloat c = (GLfloat) cos(b); - GLfloat r = minorRadius * c + majorRadius; - GLfloat z = minorRadius * (GLfloat) sin(b); - - glTexCoord2f((float) (i) / (float) (numMajor), (float) (j) \ - / (float) (numMinor)); - vNormal[0] = x0 * c; - vNormal[1] = y0 * c; - vNormal[2] = z / minorRadius; - m3dNormalizeVectorf(vNormal); - glNormal3fv(vNormal); - glVertex3f(x0 * r, y0 * r, z); - - glTexCoord2f((float) (i + 1) / (float) (numMajor), (float) (j) \ - / (float) (numMinor)); - vNormal[0] = x1 * c; - vNormal[1] = y1 * c; - vNormal[2] = z / minorRadius; - m3dNormalizeVectorf(vNormal); - glNormal3fv(vNormal); - glVertex3f(x1 * r, y1 * r, z); - } - glEnd(); - } -} - -void gltDrawJet(void) +#ifdef _WIN32 +/* this function is insane in a good way */ +char *strsep(char **stringp, const char *delim) { - M3DVector3f vNormal; - - /* nose cone, points straight down, set material color */ - /* follow few lines use manual approach */ - glBegin(GL_TRIANGLES); - glNormal3f(0.0f, -1.0f, 0.0f); - glNormal3f(0.0f, -1.0f, 0.0f); - glVertex3f(0.0f, 0.0f, 60.0f); - glVertex3f(-15.0f, 0.0f, 30.0f); - glVertex3f(15.0f, 0.0f, 30.0f); - - /* verticies for this panel */ - { - M3DVector3f vPoints[3] = { { 15.0f, 0.0f, 30.0f }, - { 0.0f, 15.0f, 30.0f }, - { 0.0f, 0.0f, 60.0f } }; - - /* calculate the normal for the plane */ - m3dFindNormalf(vNormal, vPoints[0], vPoints[1], vPoints[2]); - glNormal3fv(vNormal); - glVertex3fv(vPoints[0]); - glVertex3fv(vPoints[1]); - glVertex3fv(vPoints[2]); - } - - { - M3DVector3f vPoints[3] = { { 0.0f, 0.0f, 60.0f }, - { 0.0f, 15.0f, 30.0f }, - { -15.0f, 0.0f, 30.0f } }; - - m3dFindNormalf(vNormal, vPoints[0], vPoints[1], vPoints[2]); - glNormal3fv(vNormal); - glVertex3fv(vPoints[0]); - glVertex3fv(vPoints[1]); - glVertex3fv(vPoints[2]); - } - - /* body of the plane */ - { - M3DVector3f vPoints[3] = { { -15.0f, 0.0f, 30.0f }, - { 0.0f, 15.0f, 30.0f }, - { 0.0f, 0.0f, -56.0f }}; - - m3dFindNormalf(vNormal, vPoints[0], vPoints[1], vPoints[2]); - glNormal3fv(vNormal); - glVertex3fv(vPoints[0]); - glVertex3fv(vPoints[1]); - glVertex3fv(vPoints[2]); - } + char *result; - { - M3DVector3f vPoints[3] = { { 0.0f, 0.0f, -56.0f }, - { 0.0f, 15.0f, 30.0f }, - { 15.0f, 0.0f, 30.0f } }; - - m3dFindNormalf(vNormal, vPoints[0], vPoints[1], vPoints[2]); - glNormal3fv(vNormal); - glVertex3fv(vPoints[0]); - glVertex3fv(vPoints[1]); - glVertex3fv(vPoints[2]); - } - - glNormal3f(0.0f, -1.0f, 0.0f); - glVertex3f(15.0f, 0.0f, 30.0f); - glVertex3f(-15.0f, 0.0f, 30.0f); - glVertex3f(0.0f, 0.0f, -56.0f); - - /* left wing, large triangle for bottom of wing */ - { - M3DVector3f vPoints[3] = { { 0.0f, 2.0f, 27.0f }, - { -60.0f, 2.0f, -8.0f }, - { 60.0f, 2.0f, -8.0f } }; - - m3dFindNormalf(vNormal, vPoints[0], vPoints[1], vPoints[2]); - glNormal3fv(vNormal); - glVertex3fv(vPoints[0]); - glVertex3fv(vPoints[1]); - glVertex3fv(vPoints[2]); - } - - { - M3DVector3f vPoints[3] = { { 60.0f, 2.0f, -8.0f }, - { 0.0f, 7.0f, -8.0f }, - { 0.0f, 2.0f, 27.0f } }; - - m3dFindNormalf(vNormal, vPoints[0], vPoints[1], vPoints[2]); - glNormal3fv(vNormal); - glVertex3fv(vPoints[0]); - glVertex3fv(vPoints[1]); - glVertex3fv(vPoints[2]); - } - - { - M3DVector3f vPoints[3] = { { 60.0f, 2.0f, -8.0f }, - { -60.0f, 2.0f, -8.0f }, - { 0.0f, 7.0f, -8.0f } }; - - m3dFindNormalf(vNormal, vPoints[0], vPoints[1], vPoints[2]); - glNormal3fv(vNormal); - glVertex3fv(vPoints[0]); - glVertex3fv(vPoints[1]); - glVertex3fv(vPoints[2]); - } - - { - M3DVector3f vPoints[3] = { { 0.0f, 2.0f, 27.0f }, - { 0.0f, 7.0f, -8.0f }, - { -60.0f, 2.0f, -8.0f } }; - - m3dFindNormalf(vNormal, vPoints[0], vPoints[1], vPoints[2]); - glNormal3fv(vNormal); - glVertex3fv(vPoints[0]); - glVertex3fv(vPoints[1]); - glVertex3fv(vPoints[2]); - } - - /* tail section */ - /* bottom of back fin */ - glNormal3f(0.0f, -1.0f, 0.0f); - glVertex3f(-30.0f, -0.50f, -57.0f); - glVertex3f(30.0f, -0.50f, -57.0f); - glVertex3f(0.0f, -0.50f, -40.0f); - - { - M3DVector3f vPoints[3] = { { 0.0f, -0.5f, -40.0f }, - { 30.0f, -0.5f, -57.0f }, - { 0.0f, 4.0f, -57.0f } }; - - m3dFindNormalf(vNormal, vPoints[0], vPoints[1], vPoints[2]); - glNormal3fv(vNormal); - glVertex3fv(vPoints[0]); - glVertex3fv(vPoints[1]); - glVertex3fv(vPoints[2]); - } - - { - M3DVector3f vPoints[3] = { { 0.0f, 4.0f, -57.0f }, - { -30.0f, -0.5f, -57.0f }, - { 0.0f, -0.5f, -40.0f } }; - - m3dFindNormalf(vNormal, vPoints[0], vPoints[1], vPoints[2]); - glNormal3fv(vNormal); - glVertex3fv(vPoints[0]); - glVertex3fv(vPoints[1]); - glVertex3fv(vPoints[2]); - } - - { - M3DVector3f vPoints[3] = { { 30.0f, -0.5f, -57.0f }, - { -30.0f, -0.5f, -57.0f }, - { 0.0f, 4.0f, -57.0f } }; - - m3dFindNormalf(vNormal, vPoints[0], vPoints[1], vPoints[2]); - glNormal3fv(vNormal); - glVertex3fv(vPoints[0]); - glVertex3fv(vPoints[1]); - glVertex3fv(vPoints[2]); - } + if ((stringp == NULL) || (*stringp == NULL)) + return NULL; - { - M3DVector3f vPoints[3] = { { 0.0f, 0.5f, -40.0f }, - { 3.0f, 0.5f, -57.0f }, - { 0.0f, 25.0f, -65.0f } }; - - m3dFindNormalf(vNormal, vPoints[0], vPoints[1], vPoints[2]); - glNormal3fv(vNormal); - glVertex3fv(vPoints[0]); - glVertex3fv(vPoints[1]); - glVertex3fv(vPoints[2]); - } + result = *stringp; - { - M3DVector3f vPoints[3] = { { 0.0f, 25.0f, -65.0f }, - { -3.0f, 0.5f, -57.0f }, - { 0.0f, 0.5f, -40.0f } }; - - m3dFindNormalf(vNormal, vPoints[0], vPoints[1], vPoints[2]); - glNormal3fv(vNormal); - glVertex3fv(vPoints[0]); - glVertex3fv(vPoints[1]); - glVertex3fv(vPoints[2]); - } + while (**stringp && !strchr(delim, **stringp)) + ++*stringp; - { - M3DVector3f vPoints[3] = { { 3.0f, 0.5f, -57.0f }, - { -3.0f, 0.5f, -57.0f }, - { 0.0f, 25.0f, -65.0f } }; - - m3dFindNormalf(vNormal, vPoints[0], vPoints[1], vPoints[2]); - glNormal3fv(vNormal); - glVertex3fv(vPoints[0]); - glVertex3fv(vPoints[1]); - glVertex3fv(vPoints[2]); - } + if (**stringp) + *(*stringp)++ = '\0'; + else + *stringp = NULL; - glEnd(); + return result; } +#endif -- cgit v1.2.3