Textures | GameDev.net

injunjoe · 2003-11-20T23:28:37+00:00

Hello all, I am having trouble mapping trextures correctly to triangles using a glDrawElements. Maybe I am not defining the texture array correctly. I am using just a standard array. TextArray[]={ 0.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0} I don''t know if opengl has support to define each text array parameter for each index triangle within my triangle array. Can anyone help. Thanks

sorry, here is an example

GLfloat pCorners[] = {GetBaseUnitX() * -0.25f, 0.0f, GetBaseUnitZ() * 0.5f, // 0 Boot
GetBaseUnitX() * -0.25f, GetBaseUnitY() * 0.5f, GetBaseUnitZ() * 0.5f, // 1
GetBaseUnitX() * 1.25f, GetBaseUnitY() * 0.5f, GetBaseUnitZ() * 0.5f, // 2
GetBaseUnitX() * 1.25f, 0.0f, GetBaseUnitZ() * 0.5f, // 3
GetBaseUnitX() * 1.5f, 0.0f, GetBaseUnitZ() * 0.25f, // 4
GetBaseUnitX() * 1.5f, GetBaseUnitY() * 0.5f, GetBaseUnitZ() * 0.25f, // 5
GetBaseUnitX() * 1.5f, 0.0f, GetBaseUnitZ() * -0.25f, // 6
GetBaseUnitX() * 1.5f, GetBaseUnitY() * 0.5f, GetBaseUnitZ() * -0.25f, // 7
GetBaseUnitX() * 1.25f, GetBaseUnitY() * 0.5f, GetBaseUnitZ() * -0.5f, // 8
GetBaseUnitX() * 1.25f, 0.0f, GetBaseUnitZ() * -0.5f, // 9
GetBaseUnitX() * -0.25f, 0.0f, GetBaseUnitZ() * -0.5f, // 10
GetBaseUnitX() * -0.25f, GetBaseUnitY() * 0.5f, GetBaseUnitZ() * -0.5f, // 11
GetBaseUnitX() * 1.25f, GetBaseUnitY() * 0.75f, GetBaseUnitZ() * -0.25f,// 12
GetBaseUnitX() * 1.25f, GetBaseUnitY() * 0.75f, GetBaseUnitZ() * 0.25f, // 13
GetBaseUnitX() * 0.75f, GetBaseUnitY() * 0.75f, GetBaseUnitZ() * -0.25f,// 14
GetBaseUnitX() * 0.75f, GetBaseUnitY() * 0.75f, GetBaseUnitZ() * 0.25f, // 15
GetBaseUnitX() * 0.5f, GetBaseUnitY(), GetBaseUnitZ() * -0.25f, // 16
GetBaseUnitX() * 0.5f, GetBaseUnitY(), GetBaseUnitZ() * 0.25f, // 17
GetBaseUnitX() * 0.5f, GetBaseUnitY() * 0.5f, GetBaseUnitZ() * 0.5f, // 18
GetBaseUnitX() * 0.5f, GetBaseUnitY() * 0.5f, GetBaseUnitZ() * -0.5f, // 19
GetBaseUnitX() * 0.25f, GetBaseUnitY() * 0.5f, GetBaseUnitZ() * 0.5f, // 20
GetBaseUnitX() * 0.25f, GetBaseUnitY() * 0.5f, GetBaseUnitZ() * -0.5f, // 21
GetBaseUnitX() * -0.25f, GetBaseUnitY() * 0.5f, GetBaseUnitZ() * 0.5f, // 22
GetBaseUnitX() * -0.25f, GetBaseUnitY() * 2.0f, GetBaseUnitZ() * 0.5f, // 23
GetBaseUnitX() * 0.25f, GetBaseUnitY() * 2.0f, GetBaseUnitZ() * 0.5f, // 24
GetBaseUnitX() * 0.5f, GetBaseUnitY() * 2.0f, GetBaseUnitZ() * 0.25f, // 25
GetBaseUnitX() * 0.5f, GetBaseUnitY() * 2.0f, GetBaseUnitZ() * -0.25f, // 26
GetBaseUnitX() * 0.25f, GetBaseUnitY() * 2.0f, GetBaseUnitZ() * -0.5f, // 27
GetBaseUnitX() * 0.25f, GetBaseUnitY() * 0.0f, GetBaseUnitZ() * -0.5f, // 28
GetBaseUnitX() * -0.25f, GetBaseUnitY() * 2.0f, GetBaseUnitZ() * -0.5f, // 29
GetBaseUnitX() * -0.25f, GetBaseUnitY() * 0.0f, GetBaseUnitZ() * -0.5f, // 30
GetBaseUnitX() * -0.5f, GetBaseUnitY() * 2.0f, GetBaseUnitZ() * -0.25f, // 31
GetBaseUnitX() * -0.5f, GetBaseUnitY() * 0.0f, GetBaseUnitZ() * -0.25f, // 32
GetBaseUnitX() * -0.5f, GetBaseUnitY() * 2.0f, GetBaseUnitZ() * 0.25f, // 33
GetBaseUnitX() * -0.5f, GetBaseUnitY() * 0.0f, GetBaseUnitZ() * 0.25f}; // 34

GLubyte pIndexes[] = {0, 3, 2, 1, // Right Bottom
3, 4, 5, 2, // Right Front Bottom
4, 6, 7, 5, // Front Bottom
6, 9, 8, 7, // Left Front Bottom
9, 10, 11, 8, // Left Bottom
5, 7, 12, 13, // Top Front Angle
13, 12, 14, 15, // Top
14, 16, 17, 15, // Top Back Angle
18, 2, 13, 15, // Right Angle
19, 14, 12, 8, // Left Angle
18, 15, 17, 20, // Right Angle Back
19, 14, 16, 21, // Left Angle Back
5, 13, 13, 2, // Right Angle Front
8, 12, 12, 7, // Left Angle Front
22, 20, 24, 23, // Heal Right Side
24, 20, 17, 25, // Heal Right Front Side
17, 16, 26, 25, // Heal Front Side
16, 28, 27, 26, // Heal Left Front Side
28, 30, 29, 27, // Heal Left Side
30, 32, 31, 29, // Heal Left Back Side
32, 34, 33, 31, // Heal Back Side
34, 0, 23, 33}; // Heal Right Back Side

GLfloat norm_coords[22][3];

GLfloat tex_coords[] = { 0.0, 0.0,
0.0, 1.0,
1.0, 1.0,
1.0, 0.0 };

GLfloat pv[3][3];
GLfloat ov[3];

for (int intN = 0; intN < 22; intN++)
{
pv[0][0] = pCorners[pIndexes[intN * 4] * 3];
pv[0][1] = pCorners[pIndexes[intN * 4] * 3 + 1];
pv[0][2] = pCorners[pIndexes[intN * 4] * 3 + 2];

pv[1][0] = pCorners[pIndexes[intN * 4 + 1] * 3];
pv[1][1] = pCorners[pIndexes[intN * 4 + 1] * 3 + 1];
pv[1][2] = pCorners[pIndexes[intN * 4 + 1] * 3 + 2];

pv[2][0] = pCorners[pIndexes[intN * 4 + 2] * 3];
pv[2][1] = pCorners[pIndexes[intN * 4 + 2] * 3 + 1];
pv[2][2] = pCorners[pIndexes[intN * 4 + 2] * 3 + 2];

calcNormal(pv,ov);

norm_coords[intN][0] = ov[0];
norm_coords[intN][1] = ov[1];
norm_coords[intN][2] = ov[2];
};

// Boot
glPushMatrix();

if (BuildSide == oRight)
{
glTranslatef(0.0f, GetBaseUnitY() * -8.0f, GetBaseUnitZ() * 1.0f);
}
else
{
glTranslatef(0.0f, GetBaseUnitY() * -8.0f, GetBaseUnitZ() * -1.0f);
}

glEnable(GL_TEXTURE_2D);

glColor3ub(150,100,150);

LoadTexture(BlackLeather);

glEnableClientState ( GL_TEXTURE_COORD_ARRAY );
glTexCoordPointer (2, GL_FLOAT, 0, tex_coords );

glEnableClientState(GL_NORMAL_ARRAY);
glNormalPointer(GL_FLOAT, 0, norm_coords);

glEnableClientState ( GL_VERTEX_ARRAY );
glVertexPointer(3, GL_FLOAT, 0, pCorners);

glDrawElements(GL_QUADS, 88, GL_UNSIGNED_BYTE, pIndexes);

glPopMatrix();

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