void LoadTextures(final GL gl) {
// There is only one texture needed here--we'll set up a basic
// checkerboard--which is used to modulate the diffuse channel in the
// fragment shader.
final int[] handle = new int[1];
gl.glGenTextures(1, handle, 0);
// Basic OpenGL texture state setup
gl.glBindTexture(GL.GL_TEXTURE_2D, handle[0]);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_GENERATE_MIPMAP_SGIS, GL.GL_TRUE);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR_MIPMAP_LINEAR);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, GL.GL_CLAMP_TO_EDGE);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_T, GL.GL_CLAMP_TO_EDGE);
// Fill in the texture map.
final int RES = 512;
final float[] data = new float[RES * RES * 4];
int dp = 0;
for (int i = 0; i < RES; ++i)
for (int j = 0; j < RES; ++j) {
if ((i / 32 + j / 32) % 2 != 0) {
data[dp++] = .7f;
data[dp++] = .7f;
data[dp++] = .7f;
} else {
data[dp++] = .1f;
data[dp++] = .1f;
data[dp++] = .1f;
}
data[dp++] = 1.0f;
}
gl.glTexImage2D(
GL.GL_TEXTURE_2D,
0,
GL.GL_RGBA,
RES,
RES,
0,
GL.GL_RGBA,
GL.GL_FLOAT,
FloatBuffer.wrap(data));
// Tell Cg which texture handle should be associated with the sampler2D
// parameter to the fragment shader.
CgGL.cgGLSetTextureParameter(
CgGL.cgGetNamedParameter(fragmentProgram, "diffuseMap"), handle[0]);
}
public static Object createCGResource(int type, CGcontext context, String source, int profile) {
Object id = null;
if (type == CG_CONTEXT) {
id = CgGL.cgCreateContext();
cgContexts.add((CGcontext) id);
} else if (type == CG_PROGRAM) {
id = CgGL.cgCreateProgram(context, CgGL.CG_SOURCE, source, profile, null, null);
cgPrograms.add((CGprogram) id);
} else if (type == CG_EFFECT) {
id = CgGL.cgCreateEffect(context, source, null);
cgEffects.add((CGeffect) id);
}
return id;
}
public static void deleteCGResource(Object id, int type) {
if (type == CG_CONTEXT) {
if (cgContexts.contains(id)) {
CgGL.cgDestroyContext((CGcontext) id);
cgContexts.remove(id);
}
} else if (type == CG_PROGRAM) {
if (cgPrograms.contains(id)) {
CgGL.cgDestroyProgram((CGprogram) id);
cgPrograms.remove(id);
}
} else if (type == CG_EFFECT) {
if (cgEffects.contains(id)) {
CgGL.cgDestroyEffect((CGeffect) id);
cgEffects.remove(id);
}
}
}
void ChooseProfiles() {
// Make sure that the appropriate profiles are available on the
// user's system.
if (CgGL.cgGLIsProfileSupported(CgGL.CG_PROFILE_ARBVP1)) vertexProfile = CgGL.CG_PROFILE_ARBVP1;
else // try VP30
if (CgGL.cgGLIsProfileSupported(CgGL.CG_PROFILE_VP30)) vertexProfile = CgGL.CG_PROFILE_VP30;
else {
System.out.println("Neither arbvp1 or vp30 vertex profiles supported on this system.\n");
System.exit(1);
}
if (CgGL.cgGLIsProfileSupported(CgGL.CG_PROFILE_ARBFP1))
fragmentProfile = CgGL.CG_PROFILE_ARBFP1;
else // try FP30
if (CgGL.cgGLIsProfileSupported(CgGL.CG_PROFILE_FP30)) fragmentProfile = CgGL.CG_PROFILE_FP30;
else {
System.out.println("Neither arbfp1 or fp30 fragment profiles supported on this system.\n");
System.exit(1);
}
}
public void init(final GLAutoDrawable drawable) {
// Use debug pipeline
// drawable.setGL(new DebugGL(drawable.getGL()));
final GL gl = drawable.getGL();
// Basic Cg setup; register a callback function for any errors
// and create an initial context
// cgSetErrorCallback(handleCgError); // not yet exposed in Cg binding
context = CgGL.cgCreateContext();
// Do one-time setup only once; setup Cg programs and textures
// and set up OpenGL state.
ChooseProfiles();
LoadCgPrograms();
LoadTextures(gl);
gl.glEnable(GL.GL_DEPTH_TEST);
}
void DrawGeometry(final GL gl) {
// Cache the sphere positions, normals, texture coordinates, and
// vertex indices in a local array; we only need to fill them in the
// first time through this function.
final int nu = 30, nv = 30;
final int nTris = 2 * (nu - 1) * (nv - 1), nVerts = nu * nv;
if (P == null) {
int u, v;
P = BufferUtil.newFloatBuffer(3 * nVerts);
N = BufferUtil.newFloatBuffer(3 * nVerts);
uv = BufferUtil.newFloatBuffer(2 * nVerts);
// Fill in the position, normal, and texture coordinate arrays.
// Just loop over all of the vertices, compute their parametreic
// (u,v) coordinates (which we use for texture coordinates as
// well), and call the ParametricEval() function, which turns (u,v)
// coordinates into positions and normals on the surface of the
// object.
int pp = 0, np = 0, uvp = 0;
for (v = 0; v < nv; ++v) {
final float fv = (float) v / (float) (nv - 1);
for (u = 0; u < nu; ++u) {
final float fu = (float) u / (float) (nu - 1);
uv.put(uvp, fu);
uv.put(uvp + 1, fv);
ParametricEval(fu, fv, pp, P, np, N);
pp += 3;
np += 3;
uvp += 2;
}
}
// Now fill in the vertex index arrays
indices = BufferUtil.newIntBuffer(3 * nTris);
int ip = 0;
for (v = 0; v < nv - 1; ++v)
for (u = 0; u < nu - 1; ++u) {
indices.put(ip++, VERTEX(u, v, nu));
indices.put(ip++, VERTEX(u + 1, v, nu));
indices.put(ip++, VERTEX(u + 1, v + 1, nu));
indices.put(ip++, VERTEX(u, v, nu));
indices.put(ip++, VERTEX(u + 1, v + 1, nu));
indices.put(ip++, VERTEX(u, v + 1, nu));
}
// Tell Cg which of these data pointers are associated with which
// parameters to the vertex shader, so that when we call
// cgGLEnableClientState() and then glDrawElements(), the shader
// gets the right input information.
CGparameter param = CgGL.cgGetNamedParameter(vertexProgram, "Pobject");
CgGL.cgGLSetParameterPointer(param, 3, GL.GL_FLOAT, 0, P);
param = CgGL.cgGetNamedParameter(vertexProgram, "Nobject");
CgGL.cgGLSetParameterPointer(param, 3, GL.GL_FLOAT, 0, N);
param = CgGL.cgGetNamedParameter(vertexProgram, "TexUV");
CgGL.cgGLSetParameterPointer(param, 2, GL.GL_FLOAT, 0, uv);
}
// And now, each time through, enable the bindings to the parameters
// that we set up the first time through
CGparameter param = CgGL.cgGetNamedParameter(vertexProgram, "Pobject");
CgGL.cgGLEnableClientState(param);
param = CgGL.cgGetNamedParameter(vertexProgram, "Nobject");
CgGL.cgGLEnableClientState(param);
param = CgGL.cgGetNamedParameter(vertexProgram, "TexUV");
CgGL.cgGLEnableClientState(param);
// Enable the texture parameter as well.
param = CgGL.cgGetNamedParameter(fragmentProgram, "diffuseMap");
CgGL.cgGLEnableTextureParameter(param);
// And now, draw the geometry.
gl.glDrawElements(GL.GL_TRIANGLES, 3 * nTris, GL.GL_UNSIGNED_INT, indices);
// Be a good citizen and disable the various bindings we set up above.
param = CgGL.cgGetNamedParameter(vertexProgram, "Pobject");
CgGL.cgGLDisableClientState(param);
param = CgGL.cgGetNamedParameter(vertexProgram, "Nobject");
CgGL.cgGLDisableClientState(param);
param = CgGL.cgGetNamedParameter(vertexProgram, "TexUV");
CgGL.cgGLDisableClientState(param);
param = CgGL.cgGetNamedParameter(fragmentProgram, "diffuseMap");
CgGL.cgGLDisableTextureParameter(param);
}
void LoadCgPrograms() {
assert CgGL.cgIsContext(context);
// Load and compile the vertex program from demo_vert.cg; hold on to the
// handle to it that is returned.
try {
vertexProgram =
CgGL.cgCreateProgramFromStream(
context,
CgGL.CG_SOURCE,
getClass()
.getClassLoader()
.getResourceAsStream("demos/cg/runtime_ogl_vertex_fragment/demo_vert.cg"),
vertexProfile,
null,
null);
} catch (final IOException e) {
throw new RuntimeException("Error loading Cg vertex program", e);
}
if (!CgGL.cgIsProgramCompiled(vertexProgram)) CgGL.cgCompileProgram(vertexProgram);
// Enable the appropriate vertex profile and load the vertex program.
CgGL.cgGLEnableProfile(vertexProfile);
CgGL.cgGLLoadProgram(vertexProgram);
// And similarly set things up for the fragment program.
try {
fragmentProgram =
CgGL.cgCreateProgramFromStream(
context,
CgGL.CG_SOURCE,
getClass()
.getClassLoader()
.getResourceAsStream("demos/cg/runtime_ogl_vertex_fragment/demo_frag.cg"),
fragmentProfile,
null,
null);
} catch (final IOException e) {
throw new RuntimeException("Error loading Cg fragment program", e);
}
if (!CgGL.cgIsProgramCompiled(fragmentProgram)) CgGL.cgCompileProgram(fragmentProgram);
CgGL.cgGLEnableProfile(fragmentProfile);
CgGL.cgGLLoadProgram(fragmentProgram);
}
// display callback function
public void display(final GLAutoDrawable drawable) {
final GL gl = drawable.getGL();
// The usual OpenGL stuff to clear the screen and set up viewing.
gl.glClearColor(.25f, .25f, .25f, 1.0f);
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
gl.glMatrixMode(GL.GL_PROJECTION);
gl.glLoadIdentity();
glu.gluPerspective(30.0f, 1.0f, .1f, 100);
gl.glMatrixMode(GL.GL_MODELVIEW);
gl.glLoadIdentity();
glu.gluLookAt(4, 4, -4, 0, 0, 0, 0, 1, 0);
// Make the object rotate a bit each time the display function
// is called
gl.glRotatef(curTime, 0, 1, 0);
// Now make sure that the vertex and fragment programs, loaded
// in LoadCgPrograms() are bound.
CgGL.cgGLBindProgram(vertexProgram);
CgGL.cgGLBindProgram(fragmentProgram);
// Bind uniform parameters to vertex shader
CgGL.cgGLSetStateMatrixParameter(
CgGL.cgGetNamedParameter(vertexProgram, "ModelViewProj"),
CgGL.CG_GL_MODELVIEW_PROJECTION_MATRIX,
CgGL.CG_GL_MATRIX_IDENTITY);
CgGL.cgGLSetStateMatrixParameter(
CgGL.cgGetNamedParameter(vertexProgram, "ModelView"),
CgGL.CG_GL_MODELVIEW_MATRIX,
CgGL.CG_GL_MATRIX_IDENTITY);
CgGL.cgGLSetStateMatrixParameter(
CgGL.cgGetNamedParameter(vertexProgram, "ModelViewIT"),
CgGL.CG_GL_MODELVIEW_MATRIX,
CgGL.CG_GL_MATRIX_INVERSE_TRANSPOSE);
// We can also go ahead and bind varying parameters to vertex shader
// that we just want to have the same value for all vertices. The
// vertex shader could be modified so that these were uniform for
// better efficiency, but this gives us flexibility for the future.
final float Kd[] = {.7f, .2f, .2f}, Ks[] = {.9f, .9f, .9f};
CgGL.cgGLSetParameter3fv(CgGL.cgGetNamedParameter(vertexProgram, "diffuse"), Kd, 0);
CgGL.cgGLSetParameter3fv(CgGL.cgGetNamedParameter(vertexProgram, "specular"), Ks, 0);
// Now bind uniform parameters to fragment shader
final float lightPos[] = {3, 2, -3};
CgGL.cgGLSetParameter3fv(CgGL.cgGetNamedParameter(fragmentProgram, "Plight"), lightPos, 0);
final float lightColor[] = {1, 1, 1};
CgGL.cgGLSetParameter3fv(
CgGL.cgGetNamedParameter(fragmentProgram, "lightColor"), lightColor, 0);
CgGL.cgGLSetParameter1f(CgGL.cgGetNamedParameter(fragmentProgram, "shininess"), 40);
// And finally, enable the approprate texture for fragment shader; the
// texture was originally set up in LoadTextures().
CgGL.cgGLEnableTextureParameter(CgGL.cgGetNamedParameter(fragmentProgram, "diffuseMap"));
// And go ahead and draw the scene geometry
DrawGeometry(gl);
// Disable the texture now that we're done with it.
CgGL.cgGLDisableTextureParameter(CgGL.cgGetNamedParameter(fragmentProgram, "diffuseMap"));
++curTime;
}
// Releases any remaining OpenGL resources (including CG resources).
public static void deleteAllGLResources() {
if (!glTextureObjects.isEmpty()) {
Object[] glids = glTextureObjects.toArray();
for (int i = 0; i < glids.length; i++) {
int id = ((Integer) glids[i]).intValue();
int[] temp = {id};
gl.glDeleteTextures(1, temp, 0);
}
glTextureObjects.clear();
}
if (!glVertexBuffers.isEmpty()) {
Object[] glids = glVertexBuffers.toArray();
for (int i = 0; i < glids.length; i++) {
int id = ((Integer) glids[i]).intValue();
int[] temp = {id};
gl.glDeleteBuffersARB(1, temp, 0);
}
glVertexBuffers.clear();
}
if (!glFrameBuffers.isEmpty()) {
Object[] glids = glFrameBuffers.toArray();
for (int i = 0; i < glids.length; i++) {
int id = ((Integer) glids[i]).intValue();
int[] temp = {id};
gl.glDeleteFramebuffersEXT(1, temp, 0);
}
glFrameBuffers.clear();
}
if (!glRenderBuffers.isEmpty()) {
Object[] glids = glRenderBuffers.toArray();
for (int i = 0; i < glids.length; i++) {
int id = ((Integer) glids[i]).intValue();
int[] temp = {id};
gl.glDeleteRenderbuffersEXT(1, temp, 0);
}
glRenderBuffers.clear();
}
if (!glslPrograms.isEmpty()) {
Object[] glids = glslPrograms.toArray();
for (int i = 0; i < glids.length; i++) {
int id = ((Integer) glids[i]).intValue();
gl.glDeleteProgram(id);
}
glslPrograms.clear();
}
if (!glslShaders.isEmpty()) {
Object[] glids = glslShaders.toArray();
for (int i = 0; i < glids.length; i++) {
int id = ((Integer) glids[i]).intValue();
gl.glDeleteShader(id);
}
glslShaders.clear();
}
if (!cgContexts.isEmpty()) {
Object[] glids = cgContexts.toArray();
for (int i = 0; i < glids.length; i++) {
Object id = glids[i];
CgGL.cgDestroyContext((CGcontext) id);
}
cgContexts.clear();
}
if (!cgPrograms.isEmpty()) {
Object[] glids = cgPrograms.toArray();
for (int i = 0; i < glids.length; i++) {
Object id = glids[i];
CgGL.cgDestroyProgram((CGprogram) id);
}
cgPrograms.clear();
}
if (!cgEffects.isEmpty()) {
Object[] glids = cgEffects.toArray();
for (int i = 0; i < glids.length; i++) {
Object id = glids[i];
CgGL.cgDestroyEffect((CGeffect) id);
}
cgEffects.clear();
}
}