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in vec3 position;
in vec2 texcoord;
in vec4 color;
in vec3 normal;
uniform highp mat4 modelMatrix;
uniform highp mat4 viewMatrix;
uniform highp mat4 projMatrix;
uniform highp mat4 extraMatrix;
uniform highp mat4 normalMatrix;
uniform highp vec3 cameraPos;
uniform UBOOL textured;
uniform UBOOL useVertexAlpha;
uniform vec4 uniformColor;
struct shadow_info {
UBOOL _active;
vec3 _color;
vec3 _light;
vec3 _point;
vec3 _normal;
};
uniform shadow_info shadow;
out vec2 Texcoord;
out vec4 Color;
void main() {
vec4 pos = vec4(position, 1.0);
pos = modelMatrix * pos;
// See http://en.wikipedia.org/wiki/Line-plane_intersection
if (UBOOL_TEST(shadow._active)) {
pos /= pos.w;
vec3 l = pos.xyz - shadow._light;
float d = dot(shadow._point - shadow._light, shadow._normal) / dot(l, shadow._normal);
vec3 p = shadow._light + d * l;
pos = vec4(p, 1.0);
}
pos -= vec4(cameraPos * pos.w, 0.0);
pos = viewMatrix * pos;
pos /= pos.w;
pos.z *= -1.0;
vec4 projectedPos = projMatrix * pos;
gl_Position = projectedPos;
if (UBOOL_TEST(shadow._active)) {
Color = vec4(shadow._color, 1.0);
} else {
Color = color;
}
if (!UBOOL_TEST(useVertexAlpha))
Color.a = 1.0;
Color *= uniformColor;
if (UBOOL_TEST(textured)) {
Texcoord = texcoord;
} else {
Texcoord = vec2(0.0, 0.0);
}
}
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