I implemented a skybox into my program using a tutorial, and using the provided 6 textures from that tutorial to make a cube map texture, my skybox looked fine. However, ever since then every other skybox texture set I have tried to add has had issues with the edges not blending together. Here is generally how they always end up looking:
here is my code for for loading the textures and the parameters:
glActiveTexture(GL_TEXTURE0);
textureID = SOIL_load_OGL_cubemap(textures[0], textures[1], textures[2], textures[3], textures[4], textures[5], 0, 0, SOIL_LOAD_RGB);
glBindTexture(GL_TEXTURE_CUBE_MAP, textureID);
if (textureID == 0)
{
glGenTextures(1, &textureID);
int width, height;
unsigned char* image;
glBindTexture(GL_TEXTURE_CUBE_MAP, textureID);
for (GLuint i = 0; i < 6; i++)
{
GLuint sID = SOIL_load_OGL_texture(textures[i], 0, 0, 0);
image = SOIL_load_image(textures[i], &width, &height, 0, SOIL_LOAD_RGB);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
SOIL_free_image_data(image);
}
}
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
And code for rendering the skybox:
glDepthMask(GL_FALSE);
shader->bind();
glBindTexture(GL_TEXTURE_CUBE_MAP, textureID);
viewMatrix.r4.x = 0;
viewMatrix.r4.y = 0;
viewMatrix.r4.z = 0;
shader->loadMatrix("viewMatrix", &viewMatrix.m11);
glBindVertexArray(vao);
glEnableVertexAttribArray(0);
glDrawArrays(GL_TRIANGLES, 0, 36);
glBindVertexArray(0);
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
shader->unbind();
glDepthMask(GL_TRUE);
And the shader code
const char vertexShader[] =
"#version 330\r\n"
"in vec3 position;\r\n;"
"out vec3 texCoord;\r\n"
"uniform mat4 projectionMatrix;\r\n"
"uniform mat4 viewMatrix;\r\n"
"void main()\r\n"
"{\r\n"
"gl_Position = projectionMatrix * viewMatrix * vec4(position, 1);\r\n"
"texCoord = position;\r\n"
"}";
const char fragmentShader[] =
"#version 330\r\n"
"in vec3 texCoord;\r\n"
"out vec4 color;\r\n"
"uniform samplerCube sampler;\r\n"
"void main()\r\n"
"{\r\n"
"color = texture(sampler, texCoord);\r\n"
"}";
Does anyone see something that I might be missing that's causing my skybox to not render properly for most cube maps?
