Kill times...

The terrain looks better now.

The terrain 3D model data can be generated by Truespace.

Install MAC OS on my desktop.

Finally, I found MAC OS for my Intel CPU based computer which called Ledpard. The install file can be found through torrent. The install process is quite simple and easy but the problem is hard to look for the appropriate one.

What I am doing now?

It is a good chance to candidates who may learn about 3D graphic tools without any payment.

There are many free 3D graphic tools, such as, Google Sketch up, Blender, K3D, MeshLab, etc.

There is one more tool called Truespace which I recently have installed on my desktop. I could draw simple model mush easier.

And of course, I could get the model values using collada dae file format which is xml based text. The above shown picture is a simple plane map editer shows plane lands and fast speed of FPS, etc.

Drawing ground with texture.

The result looks more realistic of the ground. The texture is 16 bits color 565(RGB) bitmap.

If anyone want to try the texture with 16 bits 565 bitmap may use the OPENGL function follow.

Ex) glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB5, width, height, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, data);

Here is no activity for a long time!

This post has not a special content. I wish continue my activity which is related with mobile application development.
I am still using old laptop note book and the new desktop which i was bought recently is next with my laptop note book. The desktop run so fast and has more screen capacity. Run to make my new application....

Creating 3d data values for drawing ground

To create 3d data values for drawing ground have to calculate from center (0f, 0f, 0f). The left picture shows the four parts which are divided by center.
Every x and y values are increased and decreased by 1.0 or -1.0 except z values. The increase and decrease values have a same pattern. According many OpenGL examples from Internet, we can draw rectangle with 4 vertex points. Each vertex point has x, y and z value. Therefore, the program has to generate rectangle points’ value. Of course, the generated file has also color values.

int main(int argc, char **argv)
{
int nwidth = atoi(argv[1]);
int nheight = atoi(argv[2]);

fnCVertextFile(nheight, nwidth);
}

Example) program 8 8
When the program was executed like an example, then the vector values will be generated 16 * 16 sizes.

typedef struct {
float x, y, z;
} M3DPoint;

typedef struct {
M3DPoint left, top, right, bottom;
} M3DRect;

// the function writes structure values and string values to file.
void fprintfex(FILE *fvfile, M3DRect row1, char *value)
{
fprintf(fvfile, "%f %f %f %s\n", row1.left.x, row1.left.y, row1.left.z, value);
fprintf(fvfile, "%f %f %f %s\n", row1.top.x, row1.top.y, row1.top.z, value);
fprintf(fvfile, "%f %f %f %s\n", row1.right.x, row1.right.y, row1.right.z, value);
fprintf(fvfile, "%f %f %f %s\n", row1.bottom.x, row1.bottom.y, row1.bottom.z, value);
}

void fnCVertextFile(int aRow, int aColumn)
{
M3DRect row1;

float nleft = 0.0f;
float ntop = 0.0f;

char value1[] = {"0.3 0.3 0.3"};
char value2[] = {"0.5 0.5 0.5"};
char *value;
bool toggle = false;

FILE *fvfile = fopen("vector.dat", "w");
if(fvfile == NULL) {
printf("file cannot open!\n");
exit(-1);
}

// count of vertex
fprintf(fvfile, "%d\n", aRow * aColumn * 4 * 4);

for(int j = 0; j < aRow; j++)
{
for(int i = 0; i < aColumn; i++)
{
row1.left.x = nleft; row1.left.y = ntop; row1.left.z = 1.5f;
row1.top.x = nleft+1.0f; row1.top.y = ntop; row1.top.z = 1.5f;
row1.right.x = nleft+1.0f; row1.right.y = ntop+1.0f; row1.right.z = 1.5f;
row1.bottom.x = nleft; row1.bottom.y = ntop+1.0f; row1.bottom.z = 1.5f;
value = (toggle) ? value1 : value2;
fprintfex(fvfile, row1, value);
toggle = !toggle;
nleft += 1.0f;
}
ntop += 1.0f;
nleft = 0.0f;
toggle = !toggle;
}

// was ommited below section of source
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