create a gldraw.[ch] for models, also introduce few functions

1 files changed, 75 insertions, 499 deletions

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 <GL/glew.h>
-#include <GL/freeglut.h>
-#include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include "math3d.h"
+#include <string.h>
 #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