diff --git a/examples/example1/src/example1.d b/examples/example1/src/example1.d index 23bf0dc1..2dac7075 100644 --- a/examples/example1/src/example1.d +++ b/examples/example1/src/example1.d @@ -921,6 +921,10 @@ void main() } static if (ENABLE_OPENGL) { + + import derelict.opengl3.gl3; + import derelict.opengl3.gl; + class MyOpenglWidget : Widget { this() { super("OpenGLView"); @@ -929,9 +933,255 @@ static if (ENABLE_OPENGL) { backgroundDrawable = DrawableRef(new OpenGLDrawable(&doDraw)); } + bool _initCalled; + private void doDraw(DrawBuf buf, Rect rc) { // do some drawing // TODO + Log.d("Draw gears"); + if (!openglEnabled) { + Log.d("OpenGL is disabled"); + return; + } + if (!_initCalled) { + Log.d("Initializing"); + _initCalled = true; + init(); + } + reshape(rc.width, rc.height); + draw(); } } + + + + + import std.math; + static __gshared GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0; + static __gshared GLint gear1, gear2, gear3; + static __gshared GLfloat angle = 0.0; + alias M_PI = std.math.PI; + + /* + * + * Draw a gear wheel. You'll probably want to call this function when + * building a display list since we do a lot of trig here. + * + * Input: inner_radius - radius of hole at center + * outer_radius - radius at center of teeth + * width - width of gear + * teeth - number of teeth + * tooth_depth - depth of tooth + */ + static void + gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width, + GLint teeth, GLfloat tooth_depth) + { + GLint i; + GLfloat r0, r1, r2; + GLfloat angle, da; + GLfloat u, v, len; + + r0 = inner_radius; + r1 = outer_radius - tooth_depth / 2.0; + r2 = outer_radius + tooth_depth / 2.0; + + da = 2.0 * M_PI / teeth / 4.0; + + glShadeModel(GL_FLAT); + + glNormal3f(0.0, 0.0, 1.0); + + /* draw front face */ + glBegin(GL_QUAD_STRIP); + for (i = 0; i <= teeth; i++) { + angle = i * 2.0 * M_PI / teeth; + glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5); + glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5); + if (i < teeth) { + glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5); + glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), + width * 0.5); + } + } + glEnd(); + + /* draw front sides of teeth */ + glBegin(GL_QUADS); + da = 2.0 * M_PI / teeth / 4.0; + for (i = 0; i < teeth; i++) { + angle = i * 2.0 * M_PI / teeth; + + glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5); + glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5); + glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), + width * 0.5); + glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), + width * 0.5); + } + glEnd(); + + glNormal3f(0.0, 0.0, -1.0); + + /* draw back face */ + glBegin(GL_QUAD_STRIP); + for (i = 0; i <= teeth; i++) { + angle = i * 2.0 * M_PI / teeth; + glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5); + glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5); + if (i < teeth) { + glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), + -width * 0.5); + glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5); + } + } + glEnd(); + + /* draw back sides of teeth */ + glBegin(GL_QUADS); + da = 2.0 * M_PI / teeth / 4.0; + for (i = 0; i < teeth; i++) { + angle = i * 2.0 * M_PI / teeth; + + glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), + -width * 0.5); + glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), + -width * 0.5); + glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5); + glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5); + } + glEnd(); + + /* draw outward faces of teeth */ + glBegin(GL_QUAD_STRIP); + for (i = 0; i < teeth; i++) { + angle = i * 2.0 * M_PI / teeth; + + glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5); + glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5); + u = r2 * cos(angle + da) - r1 * cos(angle); + v = r2 * sin(angle + da) - r1 * sin(angle); + len = sqrt(u * u + v * v); + u /= len; + v /= len; + glNormal3f(v, -u, 0.0); + glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5); + glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5); + glNormal3f(cos(angle), sin(angle), 0.0); + glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), + width * 0.5); + glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), + -width * 0.5); + u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da); + v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da); + glNormal3f(v, -u, 0.0); + glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), + width * 0.5); + glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), + -width * 0.5); + glNormal3f(cos(angle), sin(angle), 0.0); + } + + glVertex3f(r1 * cos(0.0), r1 * sin(0.0), width * 0.5); + glVertex3f(r1 * cos(0.0), r1 * sin(0.0), -width * 0.5); + + glEnd(); + + glShadeModel(GL_SMOOTH); + + /* draw inside radius cylinder */ + glBegin(GL_QUAD_STRIP); + for (i = 0; i <= teeth; i++) { + angle = i * 2.0 * M_PI / teeth; + glNormal3f(-cos(angle), -sin(angle), 0.0); + glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5); + glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5); + } + glEnd(); + } + + + static void draw() + { + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + glPushMatrix(); + glRotatef(view_rotx, 1.0, 0.0, 0.0); + glRotatef(view_roty, 0.0, 1.0, 0.0); + glRotatef(view_rotz, 0.0, 0.0, 1.0); + + glPushMatrix(); + glTranslatef(-3.0, -2.0, 0.0); + glRotatef(angle, 0.0, 0.0, 1.0); + glCallList(gear1); + glPopMatrix(); + + glPushMatrix(); + glTranslatef(3.1, -2.0, 0.0); + glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0); + glCallList(gear2); + glPopMatrix(); + + glPushMatrix(); + glTranslatef(-3.1, 4.2, 0.0); + glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0); + glCallList(gear3); + glPopMatrix(); + + glPopMatrix(); + } + + + /* new window size or exposure */ + static void + reshape(int width, int height) + { + GLfloat h = cast(GLfloat) height / cast(GLfloat) width; + + glViewport(0, 0, cast(GLint) width, cast(GLint) height); + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0); + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + glTranslatef(0.0, 0.0, -40.0); + } + + + static void init() + { + static GLfloat[4] pos = [ 5.0, 5.0, 10.0, 0.0 ]; + static GLfloat[4] red = [ 0.8, 0.1, 0.0, 1.0 ]; + static GLfloat[4] green = [ 0.0, 0.8, 0.2, 1.0 ]; + static GLfloat[4] blue = [ 0.2, 0.2, 1.0, 1.0 ]; + + glLightfv(GL_LIGHT0, GL_POSITION, pos.ptr); + glEnable(GL_CULL_FACE); + glEnable(GL_LIGHTING); + glEnable(GL_LIGHT0); + glEnable(GL_DEPTH_TEST); + + /* make the gears */ + gear1 = glGenLists(1); + glNewList(gear1, GL_COMPILE); + glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red.ptr); + gear(1.0, 4.0, 1.0, 20, 0.7); + glEndList(); + + gear2 = glGenLists(1); + glNewList(gear2, GL_COMPILE); + glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green.ptr); + gear(0.5, 2.0, 2.0, 10, 0.7); + glEndList(); + + gear3 = glGenLists(1); + glNewList(gear3, GL_COMPILE); + glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue.ptr); + gear(1.3, 2.0, 0.5, 10, 0.7); + glEndList(); + + glEnable(GL_NORMALIZE); + } + + }