diff options
Diffstat (limited to 'lib/tqwtplot3d/src/qwt3d_lighting.cpp')
| -rw-r--r-- | lib/tqwtplot3d/src/qwt3d_lighting.cpp | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/lib/tqwtplot3d/src/qwt3d_lighting.cpp b/lib/tqwtplot3d/src/qwt3d_lighting.cpp new file mode 100644 index 0000000..2f368a0 --- /dev/null +++ b/lib/tqwtplot3d/src/qwt3d_lighting.cpp @@ -0,0 +1,192 @@ +#if defined(_MSC_VER) /* MSVC Compiler */
+#pragma warning ( disable : 4305 )
+#pragma warning ( disable : 4786 )
+#endif
+
+#include <float.h>
+#include "qwt3d_plot.h"
+
+using namespace Qwt3D;
+
+namespace {
+inline GLenum lightEnum(unsigned idx)
+{
+ switch(idx) {
+ case 0:
+ return GL_LIGHT0;
+ case 1:
+ return GL_LIGHT1;
+ case 2:
+ return GL_LIGHT2;
+ case 3:
+ return GL_LIGHT3;
+ case 4:
+ return GL_LIGHT4;
+ case 5:
+ return GL_LIGHT5;
+ case 6:
+ return GL_LIGHT6;
+ case 7:
+ return GL_LIGHT7;
+ default:
+ return GL_LIGHT0;
+ }
+}
+
+}
+
+void Plot3D::enableLighting(bool val)
+{
+ if (lighting_enabled_ == val)
+ return;
+
+ lighting_enabled_ = val;
+ makeCurrent();
+ if (val)
+ glEnable(GL_LIGHTING);
+ else
+ glDisable(GL_LIGHTING);
+
+ if (!initializedGL())
+ return;
+ updateGL();
+}
+
+void Plot3D::disableLighting(bool val)
+{
+ enableLighting(!val);
+}
+
+bool Plot3D::lightingEnabled() const
+{
+ return lighting_enabled_;
+}
+
+/**
+ \param light light number [0..7]
+ \see setLight
+*/
+void Plot3D::illuminate(unsigned light)
+{
+ if (light>7)
+ return;
+ lights_[light].unlit = false;
+}
+/**
+ \param light light number [0..7]
+ \see setLight
+*/
+void Plot3D::blowout(unsigned light)
+{
+ if (light>7)
+ return;
+ lights_[light].unlit = false;
+}
+
+/**
+ Sets GL material properties
+*/
+void Plot3D::setMaterialComponent(GLenum property, double r, double g, double b, double a)
+{
+ GLfloat rgba[4] = {(GLfloat)r, (GLfloat)g, (GLfloat)b, (GLfloat)a};
+ makeCurrent();
+ glMaterialfv(GL_FRONT_AND_BACK, property, rgba);
+}
+
+/**
+ This function is for convenience. It sets GL material properties with the equal r,g,b values
+ and a blending alpha with value 1.0
+*/
+void Plot3D::setMaterialComponent(GLenum property, double intensity)
+{
+ setMaterialComponent(property,intensity,intensity,intensity,1.0);
+}
+
+/**
+ Sets GL shininess
+*/
+void Plot3D::setShininess(double exponent)
+{
+ makeCurrent();
+ glMaterialf(GL_FRONT, GL_SHININESS, exponent);
+}
+
+/**
+ Sets GL light properties for light 'light'
+*/
+void Plot3D::setLightComponent(GLenum property, double r, double g, double b, double a, unsigned light)
+{
+ GLfloat rgba[4] = {(GLfloat)r, (GLfloat)g, (GLfloat)b, (GLfloat)a};
+ makeCurrent();
+ glLightfv(lightEnum(light), property, rgba);
+}
+
+/**
+ This function is for convenience. It sets GL light properties with the equal r,g,b values
+ and a blending alpha with value 1.0
+*/
+void Plot3D::setLightComponent(GLenum property, double intensity, unsigned light)
+{
+ setLightComponent(property,intensity,intensity,intensity,1.0, lightEnum(light));
+}
+
+/**
+ Set the rotation angle of the light source. If you look along the respective axis towards ascending values,
+ the rotation is performed in mathematical \e negative sense
+ \param xVal angle in \e degree to rotate around the X axis
+ \param yVal angle in \e degree to rotate around the Y axis
+ \param zVal angle in \e degree to rotate around the Z axis
+ \param light light number
+*/
+void Plot3D::setLightRotation( double xVal, double yVal, double zVal, unsigned light )
+{
+ if (light>7)
+ return;
+ lights_[light].rot.x = xVal;
+ lights_[light].rot.y = yVal;
+ lights_[light].rot.z = zVal;
+}
+
+/**
+ Set the shift in light source (world) coordinates.
+ \param xVal shift along (world) X axis
+ \param yVal shift along (world) Y axis
+ \param zVal shift along (world) Z axis
+ \param light light number
+ \see setViewportShift()
+*/
+void Plot3D::setLightShift( double xVal, double yVal, double zVal, unsigned light )
+{
+ if (light>7)
+ return;
+ lights_[light].shift.x = xVal;
+ lights_[light].shift.y = yVal;
+ lights_[light].shift.z = zVal;
+}
+
+void Plot3D::applyLight(unsigned light)
+{
+ if (lights_[light].unlit)
+ return;
+
+ glEnable(lightEnum(light));
+ glLoadIdentity();
+
+ glRotatef( lights_[light].rot.x-90, 1.0, 0.0, 0.0 );
+ glRotatef( lights_[light].rot.y , 0.0, 1.0, 0.0 );
+ glRotatef( lights_[light].rot.z , 0.0, 0.0, 1.0 );
+ GLfloat lightPos[4] = { lights_[light].shift.x, lights_[light].shift.y, lights_[light].shift.z, 1.0};
+ GLenum le = lightEnum(light);
+ glLightfv(le, GL_POSITION, lightPos);
+}
+
+void Plot3D::applyLights()
+{
+ glMatrixMode( GL_MODELVIEW );
+ glPushMatrix();
+ for (unsigned i=0; i<8; ++i)
+ {
+ applyLight(i);
+ }
+ glPopMatrix();
+}
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