mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-20 22:02:34 +03:00
bc0cb70b13
Developer: Roman Shuvalov git-svn-id: svn://kolibrios.org@5235 a494cfbc-eb01-0410-851d-a64ba20cac60
193 lines
3.5 KiB
C
Executable File
193 lines
3.5 KiB
C
Executable File
#include "rsmx.h"
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#ifdef RS_USE_C_LIBS
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#include <string.h>
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#include <math.h>
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#else
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#include "rsplatform.h"
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#endif
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#include "rsdebug.h"
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// Some matrix and vector stuff
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// by Roman Shuvalov
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rs_vec3_t rs_vec3_sub(rs_vec3_t v1, rs_vec3_t v2) {
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return rs_vec3(v1.x - v2.x, v1.y - v2.y, v1.z - v2.z);
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};
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rs_vec3_t rs_vec3_add(rs_vec3_t v1, rs_vec3_t v2) {
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return rs_vec3( v1.x + v2.x, v1.y + v2.y, v1.z + v2.z );
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};
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rs_vec3_t rs_vec3_mult(rs_vec3_t v, float s) {
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return rs_vec3( v.x * s, v.y * s, v.z * s );
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};
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rs_vec4_t rs_vec4_sub(rs_vec4_t v1, rs_vec4_t v2) {
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rs_vec4_t dest;
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dest.x = v1.x - v2.x;
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dest.y = v1.y - v2.y;
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dest.z = v1.z - v2.z;
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dest.w = v1.z - v2.w;
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return dest;
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};
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rs_vec4_t rs_vec4(float x, float y, float z, float w) {
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rs_vec4_t r;
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r.x = x;
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r.y = y;
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r.z = z;
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r.w = w;
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return r;
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};
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rs_vec3_t rs_vec3(float x, float y, float z) {
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rs_vec3_t r;
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r.x = x;
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r.y = y;
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r.z = z;
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return r;
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};
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float rs_vec4_length_sqr(rs_vec4_t src) {
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return src.x*src.x + src.y*src.y + src.z*src.z + src.w*src.w;
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};
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float rs_vec3_length_sqr(rs_vec3_t src) {
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return src.x*src.x + src.y*src.y + src.z*src.z;
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};
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float rs_vec4_length(rs_vec4_t v) {
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return sqrtf( rs_vec4_length_sqr(v) );
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};
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float rs_vec3_length(rs_vec3_t v) {
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return sqrtf( rs_vec3_length_sqr(v) );
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};
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rs_vec3_t rs_vec3_normalize(rs_vec3_t v) {
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float s = rs_vec3_length(v);
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if (s > 0.00001) {
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return rs_vec3( v.x / s, v.y / s, v.z / s );
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}
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return rs_vec3(0.0, 0.0, 0.0);
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};
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float rs_vec4_dot(rs_vec4_t v1, rs_vec4_t v2) {
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return ( (v1.x) * (v2.x) ) + (v1.y * v2.y) + (v1.z * v2.z) + (v1.w * v2.w);
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};
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float rs_vec3_dot(rs_vec3_t v1, rs_vec3_t v2) {
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return (v1.x) * (v2.x) + (v1.y * v2.y) + (v1.z * v2.z);
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};
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rs_vec3_t rs_vec3_cross(rs_vec3_t u, rs_vec3_t v) {
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rs_vec3_t d;
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d.x = u.y * v.z - u.z * v.y;
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d.y = u.z * v.x - u.x * v.z;
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d.z = u.x * v.y - u.y * v.x;
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return d;
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};
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float rs_vec4_angle(rs_vec4_t u, rs_vec4_t v) {
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return rs_vec4_dot(u, v) / (rs_vec4_length(u) * rs_vec4_length(v) );
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};
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float rs_vec3_cos_angle(rs_vec3_t u, rs_vec3_t v) {
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float ret = rs_vec3_dot(u, v) / (rs_vec3_length(u) * rs_vec3_length(v) );
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return ret;
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};
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float rs_vec3_distance_sqr(rs_vec3_t u, rs_vec3_t v) {
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return rs_vec3_length_sqr( rs_vec3(u.x - v.x, u.y - v.y, u.z - v.z) );
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};
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float rs_clamp(float x, float min1, float max1) {
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if (x < min1) {
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return min1;
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};
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if (x > max1) {
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return max1;
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};
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return x;
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};
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int rs_clamp_i(int x, int min1, int max1) {
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if (x < min1) {
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return min1;
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};
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if (x > max1) {
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return max1;
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};
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return x;
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};
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float rs_exp_interpolate(float v_from, float v_to, float dt) {
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return v_from + ( v_to - v_from ) * ( 1 - exp(-dt/1.0) );
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};
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float rs_max(float x, float y) {
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return x > y ? x : y;
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};
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float rs_min(float x, float y) {
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return x < y ? x : y;
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};
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float rs_sign(float f) {
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return (f >= 0.0) ? 1.0 : -1.0;
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};
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float rs_pow(float f, float p) {
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return rs_sign(f) * pow( fabs(f), p );
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};
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float rs_clamp_angle(float f) { // !!!! only one iteration
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if (f > 2.0*M_PI) {
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return f - 2.0*M_PI;
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};
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if (f < -2.0*M_PI) {
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return f + 2.0*M_PI;
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};
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return f;
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};
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float rs_linear_interpolate(float v_from, float v_to, float t) {
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return v_from*(1.0-t) + v_to*t;
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};
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float rs_fract(float f) {
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float r = floor(f);
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return f - r;
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};
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