beginning to create pedestal VBO

modes/Pedestal.cc

@@ -0,0 +1,98 @@
+
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <GL/gl.h>
+#include <GL/glu.h>
+
+#include "Pedestal.h"
+#include "glslUtil/glslUtil.h"
+
+#define N_PEDESTAL_LEVELS 4
+#define TOP_LEVEL_SIZE 4
+#define LEVEL_INC_SIZE 1.5
+#define LEVEL_HEIGHT 1
+
+static const GLfloat ped_normals[][3] = {
+    {1, 0, 0},
+    {0, 1, 0},
+    {-1, 0, 0},
+    {0, -1, 0},
+    {0, 0, 1}
+};
+
+Pedestal::Pedestal()
+{
+    m_last_ticks = 0;
+    srand(time(NULL) + getpid());
+}
+
+Pedestal::~Pedestal()
+{
+}
+
+bool Pedestal::expose (GnomeScreensaver & gs)
+{
+    if (m_last_ticks == 0)
+    {
+        m_last_ticks = gs.getTicks();
+        m_start_ticks = m_last_ticks;
+    }
+    uint64_t ticks = gs.getTicks();
+    int elapsed = ticks - m_last_ticks;
+
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    glPushMatrix();
+    glRotatef((ticks - m_start_ticks) * 0.1, 0, 0, 1);
+
+    glRotatef(90.0, 1, 0, 0);
+    m_logobox.draw();
+
+    glPopMatrix();
+
+    m_last_ticks = ticks;
+
+    return true;
+}
+
+bool Pedestal::configure (GnomeScreensaver & gs)
+{
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    gluPerspective(60.0, gs.getAspectRatio() / gs.getNumMonitors(),
+            0.01, 1000.0);
+
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+    gluLookAt(0, -18, 4, 0, 0, 0, 0, 0, 1);
+
+    glViewport(0, 0, gs.getWidth(), gs.getHeight());
+
+    typedef struct {
+        struct {
+            GLfloat pos[3];
+            GLfloat normal[3];
+        } verts[8];
+    } ped_vertex_data_t;
+    ped_vertex_data_t * vdata = new ped_vertex_data_t[N_PEDESTAL_LEVELS];
+    m_ped_vbo_id = guMakeBuffer(GL_ARRAY_BUFFER, GL_STATIC_DRAW,
+            vdata, N_PEDESTAL_LEVELS * sizeof(vdata[0]));
+    for (int i = 0; i < N_PEDESTAL_LEVELS; i++)
+    {
+        float z = i * LEVEL_HEIGHT;
+        float r = TOP_LEVEL_SIZE / 2.0
+            + LEVEL_INC_SIZE * (N_PEDESTAL_LEVELS - 1 - i);
+    }
+    delete[] vdata;
+
+    return true;
+}
+
+bool Pedestal::update (GnomeScreensaver & gs)
+{
+    return true;
+}

modes/Pedestal.h

@@ -0,0 +1,25 @@
+
+#ifndef PEDESTAL_H
+#define PEDESTAL_H
+
+#include "LogoBox.h"
+#include "Mode.h"
+#include "GnomeScreensaver.h"
+
+class Pedestal : public Mode
+{
+    public:
+        Pedestal();
+        ~Pedestal();
+        bool expose (GnomeScreensaver & gs);
+        bool configure (GnomeScreensaver & gs);
+        bool update (GnomeScreensaver & gs);
+    protected:
+        LogoBox m_logobox;
+        uint64_t m_last_ticks;
+        uint64_t m_start_ticks;
+        GLint m_ped_vbo_id;
+};
+
+#endif /* PEDESTAL_H */
+

src/dwss.cc

@@ -35,8 +35,9 @@ static Mode *getMode(GnomeScreensaver & gs)
 #if 0
     return new Starfield(gs);
     return new Spin();
-#endif
     return new Tunnel();
+#endif
+    return new Pedestal();
 }
 
 int main (int argc, char *argv[])