48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
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#include "sphere.h"
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struct Sphere makeSphere(vec3 center, float radius, vec3 albedo)
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{
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struct Sphere s;
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s.cr[0] = center[0];
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s.cr[1] = center[1];
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s.cr[2] = center[2];
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s.cr[3] = radius;
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glm_vec3_copy(albedo, s.albedo);
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return s;
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}
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void updateSphereUniform(GLuint shaderProgram, struct Sphere sphere)
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{
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int scrloc, saloc;
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scrloc = glGetUniformLocation(shaderProgram, "_sphere.cr");
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saloc = glGetUniformLocation(shaderProgram, "_sphere.albedo");
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glUniform4fv(scrloc, 1, sphere.cr);
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glUniform3fv(saloc, 1, sphere.albedo);
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updateSphereUniforms(shaderProgram, &sphere, 0);
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}
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void updateSphereUniforms(GLuint shaderProgram, struct Sphere *spheres, int count)
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{
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// set sphere count
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int loc = glGetUniformLocation(shaderProgram, "_activeSpheres");
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glUniform1i(loc, count);
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// each sphere takes up two uniform locations
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const int stride = 2;
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// first location in the array
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loc = glGetUniformLocation(shaderProgram, "_spheres[0].cr");
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for (int i = 0; i < count; i++)
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{
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struct Sphere s = spheres[i];
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glUniform4fv(loc+i*stride, 1, s.cr);
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glUniform3fv(loc+i*stride+1, 1, s.albedo);
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}
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}
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