private void applyLight(GL2 gl) {
// Prepare light parameters.
float SHINE_ALL_DIRECTIONS = 1;
float[] lightPos = {0, 40, -100, SHINE_ALL_DIRECTIONS};
float[] lightColorAmbient = {0.2f, 0.2f, 0.2f, 0.5f};
float[] lightColorDiffuse = {1f, 1f, 1f, 0.5f};
float[] lightColorSpecular = {0.8f, 0.8f, 0.8f, 0.5f};
// Set light parameters.
gl.glLightfv(GL2.GL_LIGHT1, GL2.GL_POSITION, lightPos, 0);
gl.glLightfv(GL2.GL_LIGHT1, GL2.GL_AMBIENT, lightColorAmbient, 0);
gl.glLightfv(GL2.GL_LIGHT1, GL2.GL_SPECULAR, lightColorSpecular, 0);
gl.glLightfv(GL2.GL_LIGHT1, GL2.GL_DIFFUSE, lightColorDiffuse, 0);
gl.glLightfv(GL2.GL_LIGHT2, GL2.GL_POSITION, new float[] {0, 15, -40, SHINE_ALL_DIRECTIONS}, 0);
gl.glLightfv(GL2.GL_LIGHT2, GL2.GL_AMBIENT, lightColorAmbient, 0);
gl.glLightfv(GL2.GL_LIGHT2, GL2.GL_SPECULAR, lightColorSpecular, 0);
gl.glLightfv(GL2.GL_LIGHT2, GL2.GL_DIFFUSE, lightColorDiffuse, 0);
// Enable lighting in GL.
gl.glEnable(GL2.GL_LIGHT1);
// gl.glEnable(GL2.GL_LIGHT2);
gl.glEnable(GL2.GL_LIGHTING);
// Set material properties.
// float[] rgba = {0.3f, 0.5f, 1f};
float[] rgba = {0.8f, 0.8f, 1f, 1f};
gl.glMaterialfv(GL2.GL_FRONT, GL2.GL_AMBIENT, rgba, 0);
gl.glMaterialfv(GL2.GL_FRONT, GL2.GL_SPECULAR, rgba, 0);
gl.glMaterialfv(GL2.GL_FRONT, GL2.GL_DIFFUSE, rgba, 0);
gl.glMaterialf(GL2.GL_FRONT, GL2.GL_SHININESS, 20f);
}
private void enableStates(final GL2 gl, final boolean enable) {
if (enable) {
if (null != tex) {
tex.bind(gl);
}
gl.glEnable(GL.GL_DEPTH_TEST);
gl.glDepthFunc(GL.GL_LESS); // default
// gl.glEnable(GL2.GL_TEXTURE_GEN_S);
// gl.glEnable(GL2.GL_TEXTURE_1D);
gl.glEnable(GL.GL_TEXTURE_2D);
gl.glEnable(GL.GL_CULL_FACE);
gl.glEnable(GLLightingFunc.GL_LIGHTING);
gl.glEnable(GLLightingFunc.GL_LIGHT0);
gl.glEnable(GL2.GL_AUTO_NORMAL);
gl.glEnable(GLLightingFunc.GL_NORMALIZE);
gl.glFrontFace(GL.GL_CW);
gl.glCullFace(GL.GL_BACK); // default
gl.glMaterialf(GL.GL_FRONT, GLLightingFunc.GL_SHININESS, 64.0f);
gl.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, GL.GL_REPEAT);
} else {
if (null != tex) {
gl.glBindTexture(tex.getTarget(), 0);
}
gl.glDisable(GL.GL_DEPTH_TEST);
// gl.glDisable(GL2.GL_TEXTURE_GEN_S);
// gl.glDisable(GL2.GL_TEXTURE_1D);
gl.glDisable(GL.GL_TEXTURE_2D);
gl.glDisable(GL.GL_CULL_FACE);
gl.glDisable(GLLightingFunc.GL_LIGHTING);
gl.glDisable(GLLightingFunc.GL_LIGHT0);
gl.glDisable(GL2.GL_AUTO_NORMAL);
gl.glDisable(GLLightingFunc.GL_NORMALIZE);
gl.glFrontFace(GL.GL_CCW); // default
}
}
private void renderRedTeapot(GL2 gl, float x, float y, float z) {
float mat[] = new float[4];
gl.glPushMatrix();
gl.glTranslatef(x, y, z);
mat[0] = 0.1745f;
mat[1] = 0.01175f;
mat[2] = 0.01175f;
mat[3] = 1.0f;
gl.glMaterialfv(GL.GL_FRONT, GL2.GL_SPECULAR, mat, 0);
mat[0] = 0.61424f;
mat[1] = 0.04136f;
mat[2] = 0.04136f;
gl.glMaterialfv(GL.GL_FRONT, GL2.GL_DIFFUSE, mat, 0);
mat[0] = 0.727811f;
mat[1] = 0.626959f;
mat[2] = 0.626959f;
gl.glMaterialfv(GL.GL_FRONT, GL2.GL_SPECULAR, mat, 0);
gl.glMaterialf(GL.GL_FRONT, GL2.GL_SHININESS, 0.6f * 128.0f);
glut.glutSolidTeapot(1.0);
gl.glPopMatrix();
}
@Override
public void display(GLAutoDrawable drawable) {
GL2 gl = drawable.getGL().getGL2();
gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);
gl.glShadeModel(GL2.GL_SMOOTH); // Enable Smooth Shading (Gouraud)
// Display the scene according to the current trackball orientation, scale the scene to fit
// better
tbc.prepareForDisplay(drawable);
gl.glScaled(3, 3, 3);
// Add a light
int lightNumber = 0;
float[] position = {lightPos.x, lightPos.y, lightPos.z, 1};
float[] colour = {
lightColR.getFloatValue(), lightColG.getFloatValue(), lightColB.getFloatValue(), 1
};
float[] acolour = {
colour[0] * ambient.getFloatValue(),
colour[1] * ambient.getFloatValue(),
colour[2] * ambient.getFloatValue()
};
gl.glLightfv(GL2.GL_LIGHT0 + lightNumber, GL2.GL_SPECULAR, colour, 0);
gl.glLightfv(GL2.GL_LIGHT0 + lightNumber, GL2.GL_DIFFUSE, colour, 0);
gl.glLightfv(GL2.GL_LIGHT0 + lightNumber, GL2.GL_AMBIENT, acolour, 0);
gl.glLightfv(
GL2.GL_LIGHT0 + lightNumber,
GL2.GL_POSITION,
position,
0); // transformed by the modelview matrix when glLight is called
gl.glEnable(GL2.GL_LIGHT0 + lightNumber);
// Determine which shader to display the scene with
ShaderState customShader = null;
if (viewingMode == 1) {
stateCheckerboard.useProgram(gl, false);
stateWoodcut.useProgram(gl, false);
stateToon.useProgram(gl, false);
statePerFragment.useProgram(gl, usePerFragment);
if (usePerFragment) customShader = statePerFragment;
else customShader = null;
} else if (viewingMode == 2) {
statePerFragment.useProgram(gl, false);
stateWoodcut.useProgram(gl, false);
stateToon.useProgram(gl, false);
stateCheckerboard.useProgram(gl, useCheckerboard);
if (useCheckerboard) customShader = stateCheckerboard;
else customShader = null;
} else if (viewingMode == 3) {
statePerFragment.useProgram(gl, false);
stateCheckerboard.useProgram(gl, false);
stateToon.useProgram(gl, false);
stateWoodcut.useProgram(gl, useWoodcut);
if (useWoodcut) customShader = stateWoodcut;
else customShader = null;
} else if (viewingMode == 4) {
statePerFragment.useProgram(gl, false);
stateCheckerboard.useProgram(gl, false);
stateWoodcut.useProgram(gl, false);
stateToon.useProgram(gl, useToon);
if (useToon) customShader = stateToon;
else customShader = null;
}
// Setup the uniform values that may be used within the current shader
if (customShader != null) {
// Blinn-Phong uniforms
int specExponentUniformLocation = customShader.getUniformLocation(gl, "shininess");
gl.glUniform1f(specExponentUniformLocation, shininess.getFloatValue());
int ambientUniformLocation = customShader.getUniformLocation(gl, "ambient");
gl.glUniform1f(ambientUniformLocation, ambient.getFloatValue());
// Checkerboard uniforms
int colour1UniformLocation = customShader.getUniformLocation(gl, "Color1");
float[] colour1 = {col1R.getFloatValue(), col1G.getFloatValue(), col1B.getFloatValue()};
gl.glUniform3fv(colour1UniformLocation, 1, colour1, 0);
int colour2UniformLocation = customShader.getUniformLocation(gl, "Color2");
float[] colour2 = {col2R.getFloatValue(), col2G.getFloatValue(), col2B.getFloatValue()};
gl.glUniform3fv(colour2UniformLocation, 1, colour2, 0);
int avgColourUniformLocation = customShader.getUniformLocation(gl, "AvgColor");
float[] avgColour = {
(colour1[0] + colour2[0]) / 2, (colour1[1] + colour2[1]) / 2, (colour1[2] + colour2[2]) / 2
};
gl.glUniform3fv(avgColourUniformLocation, 1, avgColour, 0);
int frequencyUniformLocation = customShader.getUniformLocation(gl, "Frequency");
double frequencyValue = frequency.getValue();
frequencyValue = useIntFrequency.getValue() ? Math.round(frequencyValue) : frequencyValue;
gl.glUniform1f(frequencyUniformLocation, (float) frequencyValue);
int useAveragingUniformLocation = customShader.getUniformLocation(gl, "UseAveraging");
gl.glUniform1i(useAveragingUniformLocation, useAveraging.getValue() ? 1 : 0);
int useSmoothStepUniformLocation = customShader.getUniformLocation(gl, "UseSmoothStep");
gl.glUniform1i(useSmoothStepUniformLocation, useSmoothStep.getValue() ? 1 : 0);
// Woodcut uniforms
int timeUniformLocation = customShader.getUniformLocation(gl, "Time");
gl.glUniform1f(timeUniformLocation, time.getFloatValue());
int lightPositionUniformLocation = customShader.getUniformLocation(gl, "LightPosition");
float[] lightPosition = {lightPos.x, lightPos.y, lightPos.z};
gl.glUniform3fv(lightPositionUniformLocation, 1, lightPosition, 0);
// Toon uniforms
int threshHighUniformLocation = customShader.getUniformLocation(gl, "ThresholdHigh");
gl.glUniform1f(threshHighUniformLocation, thresholdHigh.getFloatValue());
int threshMedUniformLocation = customShader.getUniformLocation(gl, "ThresholdMedium");
gl.glUniform1f(threshMedUniformLocation, thresholdMedium.getFloatValue());
int threshLowUniformLocation = customShader.getUniformLocation(gl, "ThresholdLow");
gl.glUniform1f(threshLowUniformLocation, thresholdLow.getFloatValue());
}
// Draw teapot
gl.glMaterialfv(GL.GL_FRONT, GL2.GL_AMBIENT_AND_DIFFUSE, new float[] {1, 1, 0, 1}, 0);
gl.glMaterialfv(GL.GL_FRONT_AND_BACK, GL2.GL_SPECULAR, new float[] {1, 1, 1, 1}, 0);
gl.glMaterialf(GL.GL_FRONT_AND_BACK, GL2.GL_SHININESS, 50);
glut.glutSolidTeapot(1);
// Draw table
gl.glMaterialfv(GL.GL_FRONT, GL2.GL_AMBIENT_AND_DIFFUSE, new float[] {0, 1, 1, 1}, 0);
gl.glMaterialfv(GL.GL_FRONT_AND_BACK, GL2.GL_SPECULAR, new float[] {1, 1, 1, 1}, 0);
gl.glMaterialf(GL.GL_FRONT_AND_BACK, GL2.GL_SHININESS, 50);
gl.glPushMatrix();
gl.glTranslated(0, -0.8, 0);
gl.glBegin(GL2.GL_TRIANGLE_FAN);
gl.glNormal3d(0, 1, 0);
gl.glTexCoord2d(0, 0);
gl.glVertex3d(-10, 0, -10);
gl.glTexCoord2d(0, 1);
gl.glVertex3d(-10, 0, 10);
gl.glTexCoord2d(1, 1);
gl.glVertex3d(10, 0, 10);
gl.glTexCoord2d(1, 0);
gl.glVertex3d(10, 0, -10);
gl.glEnd();
gl.glPopMatrix();
}
