shadow for ms3d file format

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July 17, 2007 08:25 AM

hi ///////////////////////////////////////////////////////////////////// I have this class for ms3d models : ///////////////////////////////////////////////////////////////////// class Model { public: double m_totalFrames,m_FPS; // Mesh struct Mesh { int m_materialIndex; int m_numTriangles; int *m_pTriangleIndices; }; // Material properties struct Material { float m_ambient[4], m_diffuse[4], m_specular[4], m_emissive[4]; float m_shininess; GLuint m_texture; char *m_pTextureFilename; }; // Triangle structure struct Triangle { float m_vertexNormals[3][3]; float m_s[3], m_t[3]; int m_vertexIndices[3]; }; // Vertex structure struct Vertex { char m_boneID; // for skeletal animation float m_location[3]; }; // { NEW } // Animation keyframe information struct Keyframe { int m_jointIndex; float m_time; // in milliseconds float m_parameter[3]; }; // Skeleton bone joint struct Joint { float m_localRotation[3]; float m_localTranslation[3]; Matrix m_absolute, m_relative; int m_numRotationKeyframes, m_numTranslationKeyframes; Keyframe *m_pTranslationKeyframes; Keyframe *m_pRotationKeyframes; int m_currentTranslationKeyframe, m_currentRotationKeyframe; Matrix m_final; int m_parent; }; // { end NEW } public: /* Constructor. */ Model(); /* Destructor. */ virtual ~Model(); /* Load the model data into the private variables. filename Model filename */ virtual bool loadModelData( const char *filename ) = 0; /* Draw the model. */ void draw(int start_f,int end_f,bool looping); /* Called if OpenGL context was lost and we need to reload textures, display lists, etc. */ void reloadTextures(); protected: // { NEW } /* Set the values of a particular keyframe for a particular joint. jointIndex The joint to setup the keyframe for keyframeIndex The maximum number of keyframes time The time in milliseconds of the keyframe parameter The rotation/translation values for the keyframe isRotation Whether it is a rotation or a translation keyframe */ void setJointKeyframe( int jointIndex, int keyframeIndex, float time, float *parameter, bool isRotation ); /* Setup joint matrices. */ void setupJoints(); /* Set looping factor for animation. *///--<i changed it move from protukted to pablic(by sadegh) void setLooping( bool looping ) { m_looping = looping; } /* Advance animation by a frame. */ void advanceAnimation(int start_f ,int end_f,bool looping); /* Restart animation. */ void restart(); // { end NEW } protected: // Meshes used int m_numMeshes; Mesh *m_pMeshes; // Materials used int m_numMaterials; Material *m_pMaterials; // Triangles used int m_numTriangles; Triangle *m_pTriangles; // Vertices Used int m_numVertices; Vertex *m_pVertices; // { NEW } // Joint information int m_numJoints; Joint *m_pJoints; // Timer variable Timer *m_pTimer; // Total animation time double m_totalTime; // Is the animation looping? bool m_looping; // { end NEW } }; #endif // ndef MODEL_H //////////////////////////////////////////////////////////////////////// AND THIS FOR CAST SAHDOW : (in other file ) For a text file (shadow lesson in nehe) //////////////////////////////////////////////////////////////////////// void CastShadow(glObject *o, float *lp){ unsigned int i, j, k, jj; unsigned int p1, p2; sPoint v1, v2; float side; //set visual parameter for (i=0;i<o->nPlanes;i++){ // chech to see if light is in front or behind the plane (face plane) side = o->planes.PlaneEq.a*lp[0]+ o->planes.PlaneEq.b*lp[1]+ o->planes.PlaneEq.c*lp[2]+ o->planes.PlaneEq.d*lp[3]; if (side >0) o->planes.visible = TRUE; else o->planes.visible = FALSE; } glDisable(GL_LIGHTING); glDepthMask(GL_FALSE); glDepthFunc(GL_LEQUAL); glEnable(GL_STENCIL_TEST); glColorMask(0, 0, 0, 0); glStencilFunc(GL_ALWAYS, 1, 0xffffffff); // first pass, stencil operation decreases stencil value glFrontFace(GL_CCW); glStencilOp(GL_KEEP, GL_KEEP, GL_INCR); for (i=0; i<o->nPlanes;i++){ if (o->planes.visible) for (j=0;j<3;j++){ k = o->planes.neigh[j]; if ((!k) || (!o->planes[k-1].visible)){ // here we have an edge, we must draw a polygon p1 = o->planes.p[j]; jj = (j+1)%3; p2 = o->planes.p[jj]; //calculate the length of the vector v1.x = (o->points[p1].x - lp[0])*100; v1.y = (o->points[p1].y - lp[1])*100; v1.z = (o->points[p1].z - lp[2])*100; v2.x = (o->points[p2].x - lp[0])*100; v2.y = (o->points[p2].y - lp[1])*100; v2.z = (o->points[p2].z - lp[2])*100; //draw the polygon glBegin(GL_TRIANGLE_STRIP); glVertex3f(o->points[p1].x, o->points[p1].y, o->points[p1].z); glVertex3f(o->points[p1].x + v1.x, o->points[p1].y + v1.y, o->points[p1].z + v1.z); glVertex3f(o->points[p2].x, o->points[p2].y, o->points[p2].z); glVertex3f(o->points[p2].x + v2.x, o->points[p2].y + v2.y, o->points[p2].z + v2.z); glEnd(); } } } // second pass, stencil operation increases stencil value glFrontFace(GL_CW); glStencilOp(GL_KEEP, GL_KEEP, GL_DECR); for (i=0; i<o->nPlanes;i++){ if (o->planes.visible) for (j=0;j<3;j++){ k = o->planes.neigh[j]; if ((!k) || (!o->planes[k-1].visible)){ // here we have an edge, we must draw a polygon p1 = o->planes.p[j]; jj = (j+1)%3; p2 = o->planes.p[jj]; //calculate the length of the vector v1.x = (o->points[p1].x - lp[0])*100; v1.y = (o->points[p1].y - lp[1])*100; v1.z = (o->points[p1].z - lp[2])*100; v2.x = (o->points[p2].x - lp[0])*100; v2.y = (o->points[p2].y - lp[1])*100; v2.z = (o->points[p2].z - lp[2])*100; //draw the polygon glBegin(GL_TRIANGLE_STRIP); glVertex3f(o->points[p1].x, o->points[p1].y, o->points[p1].z); glVertex3f(o->points[p1].x + v1.x, o->points[p1].y + v1.y, o->points[p1].z + v1.z); glVertex3f(o->points[p2].x, o->points[p2].y, o->points[p2].z); glVertex3f(o->points[p2].x + v2.x, o->points[p2].y + v2.y, o->points[p2].z + v2.z); glEnd(); } } } glFrontFace(GL_CCW); glColorMask(1, 1, 1, 1); //draw a shadowing rectangle covering the entire screen glColor4f(0.0f, 0.0f, 0.0f, 0.4f); glEnable(GL_BLEND); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glStencilFunc(GL_NOTEQUAL, 0, 0xffffffff); glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); glPushMatrix(); glLoadIdentity(); glBegin(GL_TRIANGLE_STRIP); glVertex3f(-0.1f, 0.1f,-0.10f); glVertex3f(-0.1f,-0.1f,-0.10f); glVertex3f( 0.1f, 0.1f,-0.10f); glVertex3f( 0.1f,-0.1f,-0.10f); glEnd(); glPopMatrix(); glDisable(GL_BLEND); glDepthFunc(GL_LEQUAL); glDepthMask(GL_TRUE); glEnable(GL_LIGHTING); glDisable(GL_STENCIL_TEST); glShadeModel(GL_SMOOTH); } #endif // _3DOBJECT_H_ ///////////////////////////////////////////////////////////////////////// NOW I WANT send a pointer as milkshape model class to castshadow function to show shadow ,where of cast shadow most be changed ? ////////////////////////////////////////////////////////////////////////// static Model *pModel CastShadow(&pModel, lp);