I’m currently learning computer graphics using OpenGL. I’ve designed a basic lamp. The plan is to animate it to jump around.
Animated gif
This lamp was made by implementing the following hierarchy structure
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public void render(GL2 gl) { double baseWidth = 1.0; double baseHeight = baseWidth*0.1; double baseLength = baseWidth; double lowerArmLength = 1.5; double lowerArmRadius = 0.1; double lowerArmRotation = 10; double upperArmLength = 1.0; double upperArmRadius = lowerArmRadius; double upperArmRotation = 45; double jointRadius = baseWidth*0.2; double coneSize = 0.7*baseWidth; double coneRotation = 270; double armSpacing = 0.1; double jumpX = 0; double jumpY = 0; double jumpZ = 0; int stacks = 100; int slices = 100; gl.glClear(GL2.GL_COLOR_BUFFER_BIT|GL2.GL_DEPTH_BUFFER_BIT); gl.glLoadIdentity(); camera.view(glu); // Orientate the camera //doLight(gl); // Place the lights //doLight1(g1); if (axes.getSwitchedOn()) axes.display(gl, glut); if (objectsOn) { // Render the objects //float[] matDiffuse = {0.9f, 0.9f, 0.9f, 1.0f}; // use glMaterialfv. There is no glMaterialdv //gl.glMaterialfv(GL2.GL_FRONT_AND_BACK, GL2.GL_DIFFUSE, matDiffuse, 0); gl.glPushMatrix(); gl.glTranslated(jumpX,jumpY,jumpZ); //Draw base gl.glPushMatrix(); gl.glScaled(baseWidth,baseHeight,baseLength); gl.glRotated(90,-1,0,0); cylinder.renderImmediateMode(gl); gl.glPopMatrix(); // Draw bottom joint gl.glPushMatrix(); gl.glScaled(baseWidth*0.4,jointRadius,baseWidth*0.4); gl.glRotated(90,-1,0,0); cylinder.renderImmediateMode(gl); gl.glPopMatrix(); gl.glRotated(lowerArmRotation,1,0,0); //Draw lower strength arm gl.glPushMatrix(); gl.glTranslated(armSpacing*baseWidth,lowerArmLength*0.5+baseHeight,0); gl.glRotated(90,0,0,1); gl.glScaled(lowerArmRadius,armSpacing*baseWidth*2,lowerArmRadius); gl.glRotated(90,-1,0,0); cylinder.renderImmediateMode(gl); gl.glPopMatrix(); //Draw lower arms gl.glPushMatrix(); gl.glTranslated(baseWidth*-armSpacing,baseHeight,0); gl.glScaled(lowerArmRadius,lowerArmLength,lowerArmRadius); gl.glRotated(90,-1,0,0); cylinder.renderImmediateMode(gl); gl.glPopMatrix(); gl.glPushMatrix(); gl.glTranslated(baseWidth*armSpacing,baseHeight,0); gl.glScaled(lowerArmRadius,lowerArmLength,lowerArmRadius); gl.glRotated(90,-1,0,0); cylinder.renderImmediateMode(gl); gl.glPopMatrix(); gl.glTranslated(0,lowerArmLength,0); gl.glRotated(upperArmRotation,1,0,0); //Draw middle joint gl.glPushMatrix(); glut.glutSolidSphere(jointRadius,slices,stacks); gl.glPopMatrix(); //Draw upper arms gl.glPushMatrix(); gl.glTranslated(baseWidth*armSpacing,0,0); gl.glScaled(upperArmRadius,upperArmLength,upperArmRadius); gl.glRotated(90,-1,0,0); cylinder.renderImmediateMode(gl); gl.glPopMatrix(); gl.glPushMatrix(); gl.glTranslated(baseWidth*-armSpacing,0,0); gl.glScaled(upperArmRadius,upperArmLength,upperArmRadius); gl.glRotated(90,-1,0,0); cylinder.renderImmediateMode(gl); gl.glPopMatrix(); gl.glTranslated(0,upperArmLength,0); //Draw cone structure gl.glPushMatrix(); gl.glRotated(coneRotation,1,0,0); gl.glTranslated(0,-coneSize,0); gl.glPushMatrix(); gl.glPushMatrix(); gl.glTranslated(0,coneSize-0.9*0.8*coneSize,0); gl.glScaled(coneSize*0.6,coneSize*0.8,coneSize*0.6); gl.glRotated(90,-1,0,0); cylinder.renderImmediateMode(gl); gl.glPopMatrix(); gl.glPushMatrix(); gl.glTranslated(0,coneSize,0); gl.glRotated(30,0,0,1); gl.glTranslated(-0.05*coneSize,0,0); gl.glScaled(0.4*coneSize,0.2*coneSize,0.1*coneSize); cube.renderImmediateMode(gl); gl.glPopMatrix(); gl.glPopMatrix(); gl.glRotated(90,-1,0,0);//Cone upright gl.glDisable(GL2.GL_CULL_FACE); glut.glutSolidCone(coneSize,coneSize,slices,stacks); gl.glEnable(GL2.GL_CULL_FACE); doLight1(gl); gl.glPopMatrix(); gl.glPopMatrix(); } } |
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