according to this thread
https://ar.qualcomm.at/arforums/showthread.php?t=834&highlight=image+plane
i deleted the teapot header and replaced it with plane header and included it instead of teapot in plane!! and still teapot appear instead of the blank plane !!
// Did we find any trackables this frame?
for(int tIdx = 0; tIdx < state.getNumActiveTrackables(); tIdx++)
{
// Get the trackable:
const QCAR::Trackable* trackable = state.getActiveTrackable(tIdx);
QCAR::Matrix44F modelViewMatrix =
QCAR::Tool::convertPose2GLMatrix(trackable->getPose());
// Choose the texture based on the target name:
//int textureIndex = (!strcmp(trackable->getName(), "stones")) ? 0 : 1;
//const Texture* const thisTexture = textures[textureIndex];
const Texture* const imgTexture = textures[2];
#ifdef USE_OPENGL_ES_1_1
// Load projection matrix:
glMatrixMode(GL_PROJECTION);
glLoadMatrixf(projectionMatrix.data);
// Load model view matrix:
glMatrixMode(GL_MODELVIEW);
glLoadMatrixf(modelViewMatrix.data);
glTranslatef(0.f, 0.f, kObjectScale);
glScalef(kObjectScale, kObjectScale, kObjectScale);
// Draw object:
glBindTexture(GL_TEXTURE_2D, thisTexture->mTextureID);
glTexCoordPointer(2, GL_FLOAT, 0, (const GLvoid*) &teapotTexCoords[0]);
glVertexPointer(3, GL_FLOAT, 0, (const GLvoid*) &teapotVertices[0]);
glNormalPointer(GL_FLOAT, 0, (const GLvoid*) &teapotNormals[0]);
glDrawElements(GL_TRIANGLES, NUM_TEAPOT_OBJECT_INDEX, GL_UNSIGNED_SHORT,
(const GLvoid*) &teapotIndices[0]);
#else
QCAR::Matrix44F modelViewProjection;
SampleUtils::translatePoseMatrix(0.0f, 0.0f, kObjectScale,
&modelViewMatrix.data[0]);
SampleUtils::scalePoseMatrix(target_size.data[0], target_size.data[1], 1.0f,
&modelViewMatrix.data[0]);
SampleUtils::multiplyMatrix(&projectionMatrix.data[0],
&modelViewMatrix.data[0] ,
&modelViewProjection.data[0]);
glUseProgram(shaderProgramID);
glVertexAttribPointer(vertexHandle, 3, GL_FLOAT, GL_FALSE, 0,
(const GLvoid*) &planeVertices[0]);
glVertexAttribPointer(normalHandle, 3, GL_FLOAT, GL_FALSE, 0,
(const GLvoid*) &planeNormals[0]);
glVertexAttribPointer(textureCoordHandle, 2, GL_FLOAT, GL_FALSE, 0,
(const GLvoid*) &planeTexCoords[0]);
glEnableVertexAttribArray(vertexHandle);
glEnableVertexAttribArray(normalHandle);
glEnableVertexAttribArray(textureCoordHandle);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, imgTexture->mTextureID);
glUniformMatrix4fv(mvpMatrixHandle, 1, GL_FALSE,
(GLfloat*)&modelViewProjection.data[0] );
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT,
(const GLvoid*) &planeIndices[0]);
SampleUtils::checkGlError("ImageTargets renderFrame");
Did you define it as planeTexcoords instead of planeTexCoords?
Make sure the variable names match, of course!
- Kim