@Override
protected void setupShader(DrawContext dc) {
if (shaderProgram == -1) {
initShader(dc);
}
GL gl = dc.getGL().getGL2();
gl.glUseProgram(shaderProgram);
// double minElevation = ((ElevationTesselator)
// dc.getGlobe().getTessellator()).getMinElevation();
// double maxElevation = ((ElevationTesselator)
// dc.getGlobe().getTessellator()).getMaxElevation();
double minElevation = clamp(shaderMinElevation, minElevationClamp, maxElevationClamp);
double maxElevation = clamp(shaderMaxElevation, minElevationClamp, maxElevationClamp);
gl.glUniform1f(minElevationUniform, (float) minElevation);
gl.glUniform1f(maxElevationUniform, (float) maxElevation);
gl.glUniform1f(exaggerationUniform, (float) exaggeration);
gl.glUniform1f(bakedExaggerationUniform, (float) bakedExaggeration);
gl.glUniform1f(opacityUniform, (float) getOpacity());
Matrix modelViewInv = dc.getView().getModelviewMatrix().getInverse();
float[] modelViewInvArray =
new float[] {
(float) modelViewInv.m11,
(float) modelViewInv.m21,
(float) modelViewInv.m31,
(float) modelViewInv.m41,
(float) modelViewInv.m12,
(float) modelViewInv.m22,
(float) modelViewInv.m32,
(float) modelViewInv.m42,
(float) modelViewInv.m13,
(float) modelViewInv.m23,
(float) modelViewInv.m33,
(float) modelViewInv.m43,
(float) modelViewInv.m14,
(float) modelViewInv.m24,
(float) modelViewInv.m34,
(float) modelViewInv.m44
};
gl.glUniformMatrix4fv(oldModelViewInverseUniform, 1, false, modelViewInvArray, 0);
Vec4 eye = dc.getView().getEyePoint();
gl.glUniform3f(eyePositionUniform, (float) eye.x, (float) eye.y, (float) eye.z);
gl.glUniform3f(
sunPositionUniform,
(float) sunPositionNormalized.x,
(float) sunPositionNormalized.y,
(float) sunPositionNormalized.z);
}
protected void initShader(DrawContext dc) {
GL gl = dc.getGL().getGL2();
int v = gl.glCreateShader(GL.GL_VERTEX_SHADER);
int f = gl.glCreateShader(GL.GL_FRAGMENT_SHADER);
String vsrc = "", fsrc = "", line;
try {
BufferedReader brv =
new BufferedReader(
new InputStreamReader(this.getClass().getResourceAsStream("vertexshader.glsl")));
while ((line = brv.readLine()) != null) {
vsrc += line + "\n";
}
BufferedReader brf =
new BufferedReader(
new InputStreamReader(this.getClass().getResourceAsStream("fragmentshader.glsl")));
while ((line = brf.readLine()) != null) {
fsrc += line + "\n";
}
} catch (Exception e) {
e.printStackTrace();
}
gl.glShaderSource(v, 1, new String[] {vsrc}, new int[] {vsrc.length()}, 0);
gl.glCompileShader(v);
gl.glShaderSource(f, 1, new String[] {fsrc}, new int[] {fsrc.length()}, 0);
gl.glCompileShader(f);
shaderProgram = gl.glCreateProgram();
gl.glAttachShader(shaderProgram, v);
gl.glAttachShader(shaderProgram, f);
gl.glLinkProgram(shaderProgram);
gl.glValidateProgram(shaderProgram);
gl.glUseProgram(shaderProgram);
gl.glUniform1i(gl.glGetUniformLocation(shaderProgram, "tex0"), 0);
gl.glUniform1i(gl.glGetUniformLocation(shaderProgram, "tex1"), 1);
minElevationUniform = gl.glGetUniformLocation(shaderProgram, "minElevation");
maxElevationUniform = gl.glGetUniformLocation(shaderProgram, "maxElevation");
minTexElevationUniform = gl.glGetUniformLocation(shaderProgram, "minTexElevation");
maxTexElevationUniform = gl.glGetUniformLocation(shaderProgram, "maxTexElevation");
exaggerationUniform = gl.glGetUniformLocation(shaderProgram, "exaggeration");
bakedExaggerationUniform = gl.glGetUniformLocation(shaderProgram, "bakedExaggeration");
opacityUniform = gl.glGetUniformLocation(shaderProgram, "opacity");
eyePositionUniform = gl.glGetUniformLocation(shaderProgram, "eyePosition");
sunPositionUniform = gl.glGetUniformLocation(shaderProgram, "sunPosition");
oldModelViewInverseUniform = gl.glGetUniformLocation(shaderProgram, "oldModelViewInverse");
}
public void unbind(GL gl) {
gl.glUseProgram(0);
}
public void bind(GL gl) {
gl.glUseProgram(program);
}