Reorganize the header files in a way that's easier to document.
This CL does not change any specification found in a .spec file,
it just reorganizes the distribution of the content.
It also changes a few files that included headers that no longer
exist.
Change-Id: I4a290a30ad3bdc31bac7a7be24e7a7dea2af2618
diff --git a/scriptc/rs_matrix.rsh b/scriptc/rs_matrix.rsh
index 3ed35a4..32496db 100644
--- a/scriptc/rs_matrix.rsh
+++ b/scriptc/rs_matrix.rsh
@@ -47,6 +47,110 @@
#ifndef RENDERSCRIPT_RS_MATRIX_RSH
#define RENDERSCRIPT_RS_MATRIX_RSH
+#include "rs_vector_math.rsh"
+
+/*
+ * Computes 6 frustum planes from the view projection matrix
+ *
+ * Parameters:
+ * viewProj matrix to extract planes from
+ * left left plane
+ * right right plane
+ * top top plane
+ * bottom bottom plane
+ * near near plane
+ * far far plane
+ */
+static inline void __attribute__((always_inline, overloadable))
+ rsExtractFrustumPlanes(const rs_matrix4x4* viewProj, float4* left, float4* right, float4* top,
+ float4* bottom, float4* near, float4* far) {
+ // x y z w = a b c d in the plane equation
+ left->x = viewProj->m[3] + viewProj->m[0];
+ left->y = viewProj->m[7] + viewProj->m[4];
+ left->z = viewProj->m[11] + viewProj->m[8];
+ left->w = viewProj->m[15] + viewProj->m[12];
+
+ right->x = viewProj->m[3] - viewProj->m[0];
+ right->y = viewProj->m[7] - viewProj->m[4];
+ right->z = viewProj->m[11] - viewProj->m[8];
+ right->w = viewProj->m[15] - viewProj->m[12];
+
+ top->x = viewProj->m[3] - viewProj->m[1];
+ top->y = viewProj->m[7] - viewProj->m[5];
+ top->z = viewProj->m[11] - viewProj->m[9];
+ top->w = viewProj->m[15] - viewProj->m[13];
+
+ bottom->x = viewProj->m[3] + viewProj->m[1];
+ bottom->y = viewProj->m[7] + viewProj->m[5];
+ bottom->z = viewProj->m[11] + viewProj->m[9];
+ bottom->w = viewProj->m[15] + viewProj->m[13];
+
+ near->x = viewProj->m[3] + viewProj->m[2];
+ near->y = viewProj->m[7] + viewProj->m[6];
+ near->z = viewProj->m[11] + viewProj->m[10];
+ near->w = viewProj->m[15] + viewProj->m[14];
+
+ far->x = viewProj->m[3] - viewProj->m[2];
+ far->y = viewProj->m[7] - viewProj->m[6];
+ far->z = viewProj->m[11] - viewProj->m[10];
+ far->w = viewProj->m[15] - viewProj->m[14];
+
+ float len = length(left->xyz);
+ *left /= len;
+ len = length(right->xyz);
+ *right /= len;
+ len = length(top->xyz);
+ *top /= len;
+ len = length(bottom->xyz);
+ *bottom /= len;
+ len = length(near->xyz);
+ *near /= len;
+ len = length(far->xyz);
+ *far /= len;
+}
+
+/*
+ * Checks if a sphere is withing the 6 frustum planes
+ *
+ * Parameters:
+ * sphere float4 representing the sphere
+ * left left plane
+ * right right plane
+ * top top plane
+ * bottom bottom plane
+ * near near plane
+ * far far plane
+ */
+static inline bool __attribute__((always_inline, overloadable))
+ rsIsSphereInFrustum(float4* sphere, float4* left, float4* right, float4* top, float4* bottom,
+ float4* near, float4* far) {
+ float distToCenter = dot(left->xyz, sphere->xyz) + left->w;
+ if (distToCenter < -sphere->w) {
+ return false;
+ }
+ distToCenter = dot(right->xyz, sphere->xyz) + right->w;
+ if (distToCenter < -sphere->w) {
+ return false;
+ }
+ distToCenter = dot(top->xyz, sphere->xyz) + top->w;
+ if (distToCenter < -sphere->w) {
+ return false;
+ }
+ distToCenter = dot(bottom->xyz, sphere->xyz) + bottom->w;
+ if (distToCenter < -sphere->w) {
+ return false;
+ }
+ distToCenter = dot(near->xyz, sphere->xyz) + near->w;
+ if (distToCenter < -sphere->w) {
+ return false;
+ }
+ distToCenter = dot(far->xyz, sphere->xyz) + far->w;
+ if (distToCenter < -sphere->w) {
+ return false;
+ }
+ return true;
+}
+
/*
* rsMatrixGet: Get one element
*